Entity Framework in stock market - entity

public List<StockMarket> ReadAllRecords(string TxtFilePath, string TxtFileName)
{
List<StockMarket> Stock = new List<StockMarket>();
String[] a = File.ReadAllLines(TxtFilePath + TxtFileName);
foreach (var b in a)
{
String[] d = b.Split(',');
StockMarket S = new StockMarket();
S.ProductId = d[0];
S.ProductName = d[1];
S.StockId = d[2];
S.StockName = d[3];
S.StockPrice = d[4];
S.NumberofStocks = d[5];
S.Currency = d[6];
Stock.Add(S);
}
return Stock;
}
public List<StockMarket> GetValidRecords(List<StockMarket> Stock, string ErrorFilePath, string ErrorFileName)
{
List<StockMarket> Valid = new List<StockMarket>();
List<StockMarket> InValid = new List<StockMarket>();
foreach (var s in Stock)
{
bool ValidRecord = true;
if (String.IsNullOrEmpty(s.ProductId) || !s.ProductId.All(Char.IsDigit))
{
ValidRecord = false;
}
if (!s.ProductName.StartsWith("ABC") || s.ProductName.Length != 6)
{
ValidRecord = false;
}
if (String.IsNullOrEmpty(s.StockId) || !s.StockId.All(Char.IsDigit))
{
ValidRecord = false;
}
if (!s.StockName.StartsWith("SBC") || s.StockName.Length != 7)
{
ValidRecord = false;
}
if (string.IsNullOrEmpty(s.StockPrice))
{
ValidRecord = false;
}
if (string.IsNullOrEmpty(s.NumberofStocks) || !s.NumberofStocks.All(char.IsDigit))
{
ValidRecord = false;
}
if (!(s.Currency.Equals("INR") || s.Currency.Equals("USD") || s.Currency.Equals("EUR")))
{
ValidRecord = false;
}
if (ValidRecord)
{
Valid.Add(s);
}
else
{
InValid.Add(s);
}
}
LogErrorRecord(InValid, ErrorFilePath, ErrorFileName);
return Valid;
}
public List<StockMarket> CalculateTotalPrice(List<StockMarket> Stock)
{
foreach (var s in Stock)
{
if (s.Currency.Equals("INR"))
{
s.TotalPrice = (Convert.ToDouble(s.StockPrice) * Convert.ToDouble(s.NumberofStocks) * 1).ToString();
}
else if (s.Currency.Equals("USD"))
{
s.TotalPrice = (Convert.ToDouble(s.StockPrice) * Convert.ToDouble(s.NumberofStocks) * 0.5).ToString();
}
else if (s.Currency.Equals("EUR"))
{
s.TotalPrice = (Convert.ToDouble(s.StockPrice) * Convert.ToDouble(s.NumberofStocks) * 0.75).ToString();
}
}
return Stock;
}
public void LogErrorRecord(List<StockMarket> InvalidStock, string ErrorFilePath, string ErrorFileName)
{
List<String> InvalidItems = new List<string>();
foreach (var I in InvalidStock)
{
InvalidItems.Add(I.ProductId + " " + I.ProductName + " " + I.StockId + " " + I.StockName + " " + I.StockPrice + " " + I.NumberofStocks + " " + I.Currency);
}
File.AppendAllLines(ErrorFilePath + ErrorFileName, InvalidItems);
}
public void SavetoDB(List<StockMarket> Stock, SqlConnection connection)
{
String Query = "insert into StockMarket(ProductId,Productname,StockId,StockName,StockPrice,NumberofStocks,Currency,TotalPrice) Values(#ProductId,#ProductName,#StockId,#StockName,#StockPrice,#NumberofStocks,#Currency,#TotalPrice)";
connection.Open();
foreach (var a in Stock)
{
SqlCommand cmd = new SqlCommand(Query, connection);
cmd.Parameters.Add("#ProductId", a.ProductId);
cmd.Parameters.Add("#ProductName", a.ProductName);
cmd.Parameters.Add("#StockId", a.StockId);
cmd.Parameters.Add("#StockName", a.StockName);
cmd.Parameters.Add("#StockPrice", a.StockPrice);
cmd.Parameters.Add("#NumberofStocks", a.NumberofStocks);
cmd.Parameters.Add("#Currency", a.Currency);
cmd.Parameters.Add("#TotalPrice", a.TotalPrice);
int b = cmd.ExecuteNonQuery();
}
connection.Close();
}
public void SaveDistinctProductName(List<StockMarket> Stock, SqlConnection connection)
{
String Query = "if not exists( select * from Product where ProductId = #ProductId) begin insert into Product (ProductId,ProductName) Values(#ProductId,#ProductName)end";
connection.Open();
foreach (var a in Stock)
{
SqlCommand cmd = new SqlCommand(Query, connection);
cmd.Parameters.Add("#ProductId", a.ProductId);
cmd.Parameters.Add("#ProductName", a.ProductName);
int b = cmd.ExecuteNonQuery();
}
connection.Close();
}
public void SaveDistinctStockName(List<StockMarket> Stock, SqlConnection connection)
{
String Query = "if not exists( select * from Stock where StockId = #StockId) begin insert into Stock (StockId,StockName) Values(#StockId,#StockName)end";
connection.Open();
foreach (var a in Stock)
{
SqlCommand cmd = new SqlCommand(Query, connection);
cmd.Parameters.Add("#StockId", a.StockId);
cmd.Parameters.Add("#StockName", a.StockName);
int b = cmd.ExecuteNonQuery();
}
connection.Close();
}
Entity Framework allows you to create a model by writing code or using boxes and lines in the EF Designer. Both of these approaches can be used to target an existing database or create a new database. This short video explains the differences and how to find the one that is right for you.
Please let me know the overview of the code

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text;
namespace EmployeeValidation
{
public class Program
{
public static void Main()
{
/*
* Pass the file path, file names and connection string if any in this method alone.
* Do not hardcode in any other methods
*/
SqlConnection connection = new SqlConnection(#"Data Source=NA03OSDVP00746\SQLEXPRESS;Initial Catalog=DBEmployeeValidation;Integrated Security=True");
EmployeeValidator empValidator = new EmployeeValidator();
empValidator.ProcessData(#"D:\Employee_Validator\Input File\", "Emp_122014.xml", #"D:\Employee_Validator\Error File\", "Emp_122014.xml", connection);
}
}
}
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Data;
using System.Collections;
using System.Xml.Linq;
using System.Linq;
using System.Text.RegularExpressions;
using System.Data.Linq;
using System.Globalization;
using System.Xml.Serialization;
using System.IO;
namespace EmployeeValidation
{
public class EmployeeValidator
{
/*
* Do not remove the attached TestProject. It is meant for auto evaluation of your source code.
* Do not attach any test classess to the attached test project.
* Do not attach any new test projects.
* You are not required to write any automated test cases. You are supposed to write only the code.
*/
public void ProcessData(string xmlFilePath, string xmlFileName,string errorFilePath, string errorFileName, SqlConnection connection)
{
//Do your logic here
//Step 1
//ReadAllEmployeesFromXmlFile
List<Employee> lstemp = new List<Employee>();
List<Employee> validemp = new List<Employee>();
lstemp = ReadAllEmployeesFromXmlFile(xmlFilePath,xmlFileName);
validemp = PickValidEmployees(lstemp);
SaveValidEmployeesToDB(validemp, connection);
ReadfromDBtoTxt(connection);
//Step 2
//PickValidEmployees
//Step 3
//SaveValidEmployeesToDataBase
}
public List<Employee> ReadAllEmployeesFromXmlFile(string xmlFilePath, string xmlFileName)
{
//Read the employee details from the xml file and return it in List collection
//Do not hardcode the filename and the file path here
//Do not return the date with time appended to it.
string employeefile = xmlFilePath + xmlFileName;
List<Employee> empdetail = new List<Employee>();
XElement getelementfile = XElement.Load(employeefile);
IEnumerable<XElement> items = getelementfile.Elements();
foreach (var item in items)
{
string _EmployeeId = item.Element("EmployeeId").Value;
string _EmployeeName = item.Element("EmployeeName").Value;
string _EmailId = item.Element("EmailId").Value;
string _DateOfJoining = item.Element("DateOfJoining").Value;
empdetail.Add(new Employee(){ EmployeeId= _EmployeeId,
EmployeeName= _EmployeeName,
EmailId=_EmailId,
DateOfJoining=_DateOfJoining
});
}
return empdetail;
}
public List<Employee> PickValidEmployees(List<Employee> employees)
{
//Pick the valid employees from the List collection
//Return the valid employees in a List
List<Employee> valid = new List<Employee>();
List<Employee> Invalid = new List<Employee>();
List<string> empnum = new List<string>();
bool isvalid = true;
foreach(Employee em in employees)
{
Regex rgxisnumeric = new Regex(#"^\d$");
Regex rgxisalphanumeric=new Regex( #"^\d*[a-zA-Z]{1,}\d*");
Regex rgxemail = new Regex(#"^([\w\.\-]+)#([\w\-]+)((\.(\w){2,3})+)$");
Regex rgxDate= new Regex(#"^((0[1-9]|1[0-2])\/((0|1)[0-9]|2[0-9]|3[0-1])\/((19|20)\d\d))$");
if (!empnum.Contains(em.EmployeeId))
{
empnum.Add(em.EmployeeId);
isvalid = true;
}
else
{
isvalid = false;
}
int empname;
isvalid= isvalid && (!string.IsNullOrEmpty(em.EmployeeId)) && (rgxisnumeric.IsMatch(em.EmployeeId));
isvalid= isvalid && (int.TryParse(em.EmployeeName, out empname)== false);
isvalid= isvalid && (!string.IsNullOrEmpty(em.EmployeeName)) && (rgxisalphanumeric.IsMatch(em.EmployeeName));
isvalid= isvalid && (!string.IsNullOrEmpty(em.EmailId)) && (rgxemail.IsMatch(em.EmailId));
isvalid= isvalid && (!string.IsNullOrEmpty(em.DateOfJoining)) && (rgxDate.IsMatch(em.DateOfJoining));
if(isvalid)
{
DateTime dt;
isvalid= isvalid && DateTime.TryParseExact(em.DateOfJoining,"MM/dd/yyyy",new CultureInfo("en-US"),DateTimeStyles.None, out dt);
}
if(isvalid)
{
valid.Add(em);
}
else
{
Invalid.Add(em);
}
}
SaveInValidEmployeesTotxt(Invalid);
return valid;//Return only valid employees in List
}
public void SaveValidEmployeesToDB(List<Employee> employees, SqlConnection connection)
{
//Do not Prefix Database name in the SQL Query. Query should be "Insert into SBA.TableName"
//Should not be "Insert into DatabaseName.SBA.TableName"
//Do not hardcode the connection string here
SqlConnection conn = connection;
foreach(Employee emp in employees)
{
string command = "Insert into SBA.Employees (EmployeeId,EmployeeName,EmailId,DateOfJoining) values (#EmployeeId,#EmployeeName,#EmailId,#DateOfJoining)";
SqlCommand cmd = new SqlCommand(command, conn);
conn.Open();
cmd.Parameters.AddWithValue("#EmployeeId",emp.EmployeeId);
cmd.Parameters.AddWithValue("#EmployeeName",emp.EmployeeName);
cmd.Parameters.AddWithValue("#EmailId",emp.EmailId);
cmd.Parameters.AddWithValue("#DateOfJoining",DateTime.Parse(emp.DateOfJoining).ToString("MM/dd/yyyy"));
cmd.ExecuteNonQuery();
conn.Close();
}
}
public void SaveInValidEmployeesTotxt(List<Employee> Invalid)
{
string invalidpath = #"D:\Employee_Validator\Error File\Emp_122014.xml";
XmlSerializer serialise = new XmlSerializer(typeof(List<Employee>));
TextWriter writeinvalid = new StreamWriter(invalidpath);
serialise.Serialize(writeinvalid,Invalid);
}
public void ReadfromDBtoTxt(SqlConnection connection)
{
string newfilepath = #"D:\Employee_Validator\DBtoTXT\EmpoValid_" + DateTime.Now.ToString("MMyyyy") + ".txt";
List<Employee> dbtotextlist = new List<Employee>();
if (!File.Exists(newfilepath))
{
var g= File.Create(newfilepath);
g.Close();
}
SqlCommand cmd = new SqlCommand("Select * from SBA.Employees",connection);
connection.Open();
SqlDataReader readdata = cmd.ExecuteReader();
while (readdata.Read())
{
dbtotextlist.Add(new Employee
{
EmployeeId = readdata["EmployeeId"].ToString(),
EmployeeName = readdata["EmployeeName"].ToString(),
EmailId = readdata["EmailId"].ToString(),
DateOfJoining = readdata["DateOfJoining"].ToString()
});
}
sconnection.Close();
StreamWriter sw = File.AppendText(newfilepath);
foreach(Employee s in dbtotextlist)
{
sw.WriteLine(s.EmployeeId+","+s.EmployeeName+","+s.EmailId+","+ DateTime.Parse(s.DateOfJoining).ToString("MM/dd/yyyy"));
}
sw.Flush();
sw.Close();
}
}
}

static void Main(string[] args)
{
SqlConnection connectionObject = new SqlConnection(#"Data Source=NA03OSDVP00746\SQLEXPRESS;Initial Catalog= DBFXCalculation;Integrated Security=True");
Main fxcalculatorobj = new Main();
fxcalculatorobj.ProcessData(#"D:\frameworksample\Input File\", "TradeOrders_032013.txt",
#"D:\frameworksample\ErrorLog\", "InvalidRecords_032014.txt", connectionObject,
#"D:\frameworksample\Archive\", "TradeOrders_032013_Processed.txt");
/*
* Pass the file path, file names and connection string in this method alone.
* Do not hardcode in any other methods
*/
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data.SqlClient;
using System.Globalization;
using System.Text.RegularExpressions;
using System.Reflection;
namespace frameworksample
{
class Main
{
public void ProcessData(string sourceFolder, string fileName, string errorLogFilePath,
string errorLogFileName, SqlConnection connectionObject,
string archiveFilePath, string archiveFileName)
{
//Step 1:ReadAllDataFromInputFile
List<Trade> trades = ReadAllDataFromInputFile(sourceFolder, fileName);
//Step 2:PickValidTradeDetails;
List<Trade> validateTrade = PickValidTradeDetails(trades, errorLogFilePath, errorLogFileName);
//Step 3: SaveValidRecordsToDB
SaveValidRecordsToDB(validateTrade, connectionObject);
//Step 4:CalculateFXRate
List<FXRate> fxRates = CalculateFXRate(connectionObject);
//Step 5:SaveFXRate
//List<FXRate> fxRates = new List<FXRate>();
SaveFXRate(fxRates, connectionObject);
//Step 6:CopyToArchive
CopyToArchive(archiveFilePath, archiveFileName);
//Validate data
}
public List<Trade> ReadAllDataFromInputFile(string sourceFolder, string fileName)
{
List<Trade> trades = new List<Trade>();
//Do your logic to read file and storing it into list of trades ..here..
//Do not hardcode the filename and the file path here
using(StreamReader sr= File.OpenText(sourceFolder+fileName))
{
string s="";
while((s=sr.ReadLine())!=null)
{
if(s.Contains(','))
{
string[] splited= s.Split(',');
Trade tradeitem= new Trade();
tradeitem.TradeId= splited[0];
tradeitem.ISIN= splited[1];
tradeitem.TradeDate= splited[2];
tradeitem.MaturityDate= splited[3];
tradeitem.SchemeName= splited[4];
tradeitem.TradeType= splited[5];
tradeitem.Currency= splited[6];
tradeitem.Amount= splited[7];
trades.Add(tradeitem);
}
}
}
return trades;
}
public List<Trade> PickValidTradeDetails(List<Trade> trades, string errorLogFilePath, string errorLogFileName)
{
//email: \w+([-+.']\w+)*#\w+([-.]\w+)*\.\w+([-.]\w+)* ,,,, \b[A-Z0-9._%+-]+#[A-Z0-9.-]+\.[A-Z]{2,4}\b
// Step 1 : filter the valid trades and invalid trades, save the invalid
List<Trade> validTrades = new List<Trade>(); //identify all the valid trades and assign.
//Do not hardcode the filename and the file path here
List<Trade> invalidTrade = new List<Trade>();
bool isValid = true;
foreach (Trade x in trades)
{
isValid=(!string.IsNullOrEmpty(x.TradeId));
Regex rgxtradeid = new Regex(#"\bTR\d{3}\b");
isValid = isValid && rgxtradeid.IsMatch(x.TradeId);
isValid=(isValid && (!string.IsNullOrEmpty(x.ISIN)));
Regex rgxisin = new Regex(#"\bISIN\d{3}\b");
isValid = (rgxisin.IsMatch(x.ISIN));
Regex rgxdate = new Regex("((0[1-9]|1[0-2])\\/((0|1)[0-9]|2[0-9]|3[0-1])\\/((19|20)\\d\\d))$");
DateTime dt;
isValid = (isValid && (!string.IsNullOrEmpty(x.TradeDate)) && (rgxdate.IsMatch(x.TradeDate)));
isValid = (isValid && (!string.IsNullOrEmpty(x.MaturityDate)) && (rgxdate.IsMatch(x.MaturityDate)));
if (isValid)
{
DateTime MD = DateTime.Parse(x.MaturityDate);
DateTime TD = DateTime.Parse(x.TradeDate);
int year = MD.Year - TD.Year;
isValid = isValid && (year > 5);
isValid = isValid && (!string.IsNullOrEmpty(x.TradeType));
isValid = isValid && (x.Currency.Equals("GBP") || x.Currency.Equals("EUR") || x.Currency.Equals("USD") || x.Currency.Equals("INR"));
isValid = isValid && (!string.IsNullOrEmpty(x.Amount));
int i;
bool isnumeric = int.TryParse(x.Amount, out i);
isValid = isValid && (isnumeric);
}
if(isValid)
{
Trade val= new Trade();
val.TradeId= x.TradeId;
val.ISIN= x.ISIN;
val.TradeDate= x.TradeDate;
val.MaturityDate= x.MaturityDate;
val.SchemeName= x.SchemeName;
val.TradeType= x.TradeType;
val.Currency= x.Currency;
val.Amount= x.Amount;
validTrades.Add(val);
}
else
{
Trade valerror= new Trade();
valerror.TradeId= x.TradeId;
valerror.ISIN= x.ISIN;
valerror.TradeDate= x.TradeDate;
valerror.MaturityDate= x.MaturityDate;
valerror.SchemeName= x.SchemeName;
valerror.TradeType= x.TradeType;
valerror.Currency= x.Currency;
valerror.Amount= x.Amount;
invalidTrade.Add(valerror);
}
}
SaveInvalidRecordsToLogFile(invalidTrade, errorLogFilePath, errorLogFileName);
// SaveInvalidRecordsToLogFile(List<Trades>); // pass all the invalid trades to log...
return validTrades;
}
public bool SaveInvalidRecordsToLogFile(List<Trade> invalidTrades, string errorLogFilePath, string errorLogFileName)
{
//Do your logic here
//Do not hardcode the filename and the file path here
if (invalidTrades != null && invalidTrades.Count > 0)
{
string errorLogfile = errorLogFilePath + errorLogFileName;
try
{
if (!File.Exists(errorLogfile))
{
var invalidfile = File.Create(errorLogfile);
invalidfile.Close();
}
using (StreamWriter swinvalid = File.AppendText(errorLogfile))
{
swinvalid.WriteLine("TradeId|ISIN|TradeDate|MaturityDate|Tradetype|Currency|Amount");
foreach (Trade ivt in invalidTrades)
{
swinvalid.WriteLine(ivt.TradeId + "," + ivt.ISIN + "," + ivt.TradeDate + "," + ivt.MaturityDate + "'" + ivt.TradeType + "," + ivt.Currency + "," + ivt.Amount);
}
}
}
catch (Exception ex)
{
throw new FXCalculatorException(ex.Message);
}
}
return true;
}
public bool SaveValidRecordsToDB(List<Trade> validTrades, SqlConnection sqlConnectionObject)
{
//Do your logic here to upload to DB table
//Do not hardcode the connection string here
//Do not create the redundant connection Object for SqlConnection, use the conncetionObject given in the method parameter.
//Do not Prefix Database name in the SQL Query. Query should be "Insert into SBA.TableName"
//Should not be "Insert into DatabaseName.SBA.TableName"
//var ConnectionString = sqlConnectionObject.ConnectionString;
if (validTrades.Count > 0 && validTrades != null)
{
SqlConnection conn = sqlConnectionObject;
conn.Open();
foreach (Trade valid in validTrades)
{
SqlCommand cmd = new SqlCommand(("Insert into SBA.Trade_Details (TradeID,ISIN,TradeDate,MaturityDate,SchemeName,TradeType,Currency,Amount) values (#TradeID,#ISIN,#TradeDate,#MaturityDate,#SchemeName,#TradeType,#Currency,#Amount)"),conn);
cmd.Parameters.Add("#TradeID",valid.TradeId);
cmd.Parameters.Add("#ISIN", valid.ISIN);
cmd.Parameters.Add("#TradeDate", valid.TradeDate);
cmd.Parameters.Add("#MaturityDate", valid.MaturityDate);
cmd.Parameters.Add("#SchemeName", valid.SchemeName);
cmd.Parameters.Add("#TradeType", valid.TradeType);
cmd.Parameters.Add("#Currency", valid.Currency);
cmd.Parameters.Add("#Amount", valid.Amount);
cmd.ExecuteNonQuery();
}
conn.Close();
}
return true;
}
public List<FXRate> CalculateFXRate(SqlConnection sqlConnectionObject)
{
// TODO :Read the Trade details for TradeType FX from database and calculate the rates.
// Calculate the rate for each trade and add in a list of FXRates.
//Do not Prefix Database name in the SQL Query. Query should be "Insert into SBA.TableName"
//Should not be "Insert into DatabaseName.SBA.TableName"
//List<FXRate> FxRates = null; // assign list of FXRates;
//Do not hardcode the connection string here
//Do not create the redundant connection Object for SqlConnection, use the conncetionObject given in the method parameter.
List<FXRate> FxRates = new List<FXRate>();
List<Trade> trades = new List<Trade>();
try
{
SqlConnection conne = sqlConnectionObject;
string queryString = "Select * from SBA.Trade_Details";
SqlCommand cmd = new SqlCommand(queryString, conne);
conne.Open();
SqlDataReader datareader = cmd.ExecuteReader();
while (datareader.Read())
{
Trade validfx = new Trade{TradeId = datareader["TradeId"].ToString(),ISIN = datareader["ISIN"].ToString(),TradeDate = datareader["TradeDate"].ToString(),
MaturityDate = datareader["MaturityDate"].ToString(),SchemeName = datareader["SchemeName"].ToString(),TradeType = datareader["TradeType"].ToString(),
Currency = datareader["Currency"].ToString(), Amount = datareader["Amount"].ToString()};
trades.Add(validfx);
}
conne.Close();
foreach (Trade trad_para_to_calc_fx in trades)
{
FXRate fx = new FXRate();
fx.TradeId = trad_para_to_calc_fx.TradeId;
fx.Currency = trad_para_to_calc_fx.Currency;
fx.Amount = trad_para_to_calc_fx.Amount;
float amount = float.Parse(fx.Amount, CultureInfo.InvariantCulture.NumberFormat);
if (trad_para_to_calc_fx.Currency == "USD")
{
fx.AppliedFXRate = float.Parse("0.5",CultureInfo.InvariantCulture.NumberFormat).ToString();
float app_fx_rate = float.Parse("0.5",CultureInfo.InvariantCulture.NumberFormat);
fx.CalculatedFXRate = ((app_fx_rate) * (amount)).ToString();
}
if (trad_para_to_calc_fx.Currency == "GBP")
{
fx.AppliedFXRate = float.Parse("0.6", CultureInfo.InvariantCulture.NumberFormat).ToString();
float app_fx_rate = float.Parse("0.7",CultureInfo.InvariantCulture.NumberFormat);
fx.CalculatedFXRate = ((app_fx_rate) * (amount)).ToString();
}
if (trad_para_to_calc_fx.Currency == "EUR")
{
fx.AppliedFXRate = float.Parse("0.7", CultureInfo.InvariantCulture.NumberFormat).ToString();
float app_fx_rate = float.Parse("0.7",CultureInfo.InvariantCulture.NumberFormat);
fx.CalculatedFXRate = ((app_fx_rate) * (amount)).ToString();
}
if (trad_para_to_calc_fx.Currency == "INR")
{
fx.AppliedFXRate = float.Parse("1", CultureInfo.InvariantCulture.NumberFormat).ToString();
float app_fx_rate = float.Parse("1",CultureInfo.InvariantCulture.NumberFormat);
fx.CalculatedFXRate = ((app_fx_rate) * (amount)).ToString();
}
FxRates.Add(fx);
}
}
catch (Exception ex)
{
throw new FXCalculatorException(ex.Message);
}
return FxRates;
}
public bool SaveFXRate(List<FXRate> fxRates, SqlConnection sqlConnectionObject)
{
//Do your logic here to upload to DB table
//Do not hardcode the connection string here
//Do not create the redundant connection Object for SqlConnection, use the conncetionObject given in the method parameter.
//Do not Prefix Database name in the SQL Query. Query should be "Insert into SBA.TableName"
//Should not be "Insert into DatabaseName.SBA.TableName"
try
{
if (fxRates.Count > 0 && fxRates != null)
{
SqlConnection conne = sqlConnectionObject;
conne.Open();
foreach(FXRate calculated in fxRates)
{
SqlCommand cmd = new SqlCommand("Insert into SBA.FX_Rate (TradeId,Currency,Amount,AppliedFXRate,CalculatedFXRate) values (#TradeId,#Currency,#Amount,#AppliedFXRate,#CalculatedFXRate)", conne);
cmd.Parameters.AddWithValue("#TradeId", calculated.TradeId);
cmd.Parameters.AddWithValue("#Currency",calculated.Currency);
cmd.Parameters.AddWithValue("#Amount",calculated.Amount);
cmd.Parameters.AddWithValue("#AppliedFXRate",calculated.AppliedFXRate);
cmd.Parameters.AddWithValue("#CalculatedFXRate", calculated.CalculatedFXRate);
cmd.ExecuteNonQuery();
}
conne.Close();
}
}
catch (Exception ex)
{
throw new FXCalculatorException(ex.Message);
}
return true;
}
public bool CopyToArchive(string sourcePathWithFileName, string targetPathWithFileName)
{
//Do your logic here
//Do not hardcode the filename and the file path here
try
{
string inputpath="";
string input="";
FileInfo[] files;
DirectoryInfo Di;
string targetFile = sourcePathWithFileName + targetPathWithFileName;
Di = new DirectoryInfo(#"D:\frameworksample\");
files = Di.GetFiles("*.txt", SearchOption.AllDirectories);
foreach (FileInfo di1 in files)
{
if (di1.Name == "TradeOrders_032013.txt")
{
inputpath = di1.DirectoryName.ToString();
input = inputpath+"\\" + di1.Name.ToString();
}
}
if (!Directory.Exists(sourcePathWithFileName))
{
Directory.CreateDirectory(sourcePathWithFileName);
var targetfilecreation = File.Create(targetFile);
targetfilecreation.Close();
}
else
{
File.Delete(targetFile);
Directory.Delete(sourcePathWithFileName, true);
Directory.CreateDirectory(sourcePathWithFileName);
var targetfilecreation =File.Create(targetFile);
targetfilecreation.Close();
}
System.IO.File.Copy(input, targetFile, true);
}
catch (Exception ex)
{
throw new FXCalculatorException(ex.Message);
}
//File.Copy(sourcePathWithFileName + "\\" + targetPathWithFileName, true);
return true;
}
private void ProcessData(Main main)
{
throw new NotImplementedException();
}
//internal void ProcessData(string p, string p_2, string p_3, string p_4, System.Data.SqlClient.SqlConnection connectionObject, string p_5, string p_6)
//{
// throw new NotImplementedException();
//}
}
}

Related

Is it possible to return an array of dictionaries?

I wrote a function that will return a single sql record as a dictionary. Is it possible to return an array of dictionaries so I can return multiple records in this way?
public static async Task<Dictionary<string, string>> SQLMultiRecordToDictionary(string TableName, string SearchField, string SearchValue)
{
Dictionary<string, string> QueryResult = new Dictionary<string, string>();
// is TableName sane
if (!IsTextSane(TableName)) { return QueryResult; }
//
await using (var connection = new SqliteConnection("Data Source=" + dbFullPathName))
{
connection.Open();
SqliteCommand sqlcmd = connection.CreateCommand();
sqlcmd.CommandText = "SELECT * FROM " + TableName + " WHERE " + SearchField + "=#SearchValue";
sqlcmd.Parameters.AddWithValue("#SearchValue", SearchValue);
SqliteDataReader sqlreader = sqlcmd.ExecuteReader();
// generate dictionary keys with blank values
// this prevents key not existing issues when no record is returned
// i prefer no/blank values in the keys when no record returned for this project
for (int i = 0; i < sqlreader.FieldCount; i++)
{
QueryResult.Add(sqlreader.GetName(i), ""); // blank value
}
// add the values to the keys
while (sqlreader.Read())
{
for (int i = 0; i <= sqlreader.FieldCount - 1; i++)
{
QueryResult[sqlreader.GetName(i)] = sqlreader.GetString(i);
}
}
return QueryResult;
}
}
The working end result thanks to Tisa:
public static async Task<List<Dictionary<string, string>>> SQLMultiRecordToDictionaryList(string TableName, string SearchField, string SearchValue)
{
List<Dictionary<string, string>> QueryResult = new List<Dictionary<string, string>>();
Dictionary<string, string> SQLRecord = new Dictionary<string, string>();
//
// is TableName sane, if not return nothing
if (!IsTextSane(TableName)) { return QueryResult; }
//
await using (var connection = new SqliteConnection("Data Source=" + dbFullPathName))
{
connection.Open();
SqliteCommand sqlcmd = connection.CreateCommand();
sqlcmd.CommandText = "SELECT * FROM " + TableName + " WHERE " + SearchField + "=#SearchValue";
sqlcmd.Parameters.AddWithValue("#SearchValue", SearchValue);
SqliteDataReader sqlreader = sqlcmd.ExecuteReader();
// generate dictionary keys with blank values if no rows
// this prevents key not existing issues when no record is returned
// i prefer no/blank values in the keys when no record returned for this project
if (!sqlreader.HasRows)
{
for (int i = 0; i < sqlreader.FieldCount; i++)
{
SQLRecord.Add(sqlreader.GetName(i), ""); // blank value
}
QueryResult.Add(SQLRecord);
}
//
// add the values to the keys if there are rows (this doesn't run if no rows returned)
while (sqlreader.Read())
{
SQLRecord = new Dictionary<string, string>();
for (int i = 0; i <= sqlreader.FieldCount - 1; i++)
{
SQLRecord.Add(sqlreader.GetName(i), sqlreader.GetString(i));
}
QueryResult.Add(SQLRecord);
}
return QueryResult;
}
}

Entity framework in order

Sourcefile and file name are the source path . Archive folder and the archive filename is the destination folder . The value of the input file should be moved to the destination file.Getting error while copying file from source to destination. Showing "File has been already created". Please let me know how to find the directory of a source file without hardcode. How can I write the valid details in another file in the XML Format.
using System; using System.Collections.Generic;using System.IO;
using System.Linq;using System.Security; using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Xml.Serialization;
using System.Xml;
using System.Xml.Linq;
using System.Text.RegularExpressions;
using EmployeeValidation;
using static EmployeeValidation.FundsValidatorException;
namespace FundsValidator
{
public class empValidator
{
public bool ProcessData(string sourceFolder, string fileName, string archiveFolder, string archiveFileName, SqlConnection connection)
{
List<Order> Orders = ReadAllDataFromInputFile(sourceFolder,fileName);
//Step 2
//SetValidationFlag
List<Order> ValidOrder = SetValidationFlag(Orders);
//Step 3
//InsertOrderData
bool insertBit = InsertOrderData(ValidOrder, connection);
//Step 4
//GetProductsCommission
DataTable dtprodcomm = GetProductsCommission(connection);
//Step 5
//archive file
bool archive = CopyToArchive( sourceFileName, sourceFilePath, archiveFileName, archiveFilePath)
return true;
}
public List<Order> ReadAllDataFromInputFile(string sourceFolder, string fileName)
{
List<Order> inputlist = null;
{
try
{
inputlist = new List<Order>();
var inputlines = File.ReadAllLines(sourceFolder + fileName);
foreach (var item in inputlines)
{
string[] datas = item.Split(',');
Order orderdetails = new Order()
{
OrderId = datas[0],
SalesPersonId = datas[1],
OrderDate = Convert.ToDateTime(datas[2]).ToShortDateString(),
ModelNbr = datas[3],
Quantity = datas[4],
CustomerId = datas[5],
DeliveryDate = datas[6]
};
inputlist.Add(orderdetails);
}
}
catch(OrderProcessorException)
{
throw new OrderProcessorException();
}
}
return inputlist;
}
public List<Order> SetValidationFlag(List<Order> Orders)
{
List<Order> validList = null;
validList = new List<Order>();
int num = 0;
DateTime dtOrderdate;
DateTime dtdeliverydate;
if (Orders != null && Orders.Count >0)
{
foreach(var item in Orders)
{
if(int.TryParse(item.OrderId, out num) &&
item.SalesPersonId.StartsWith("SP") && item.SalesPersonId.Substring(2).Length == 3 && int.TryParse(item.SalesPersonId.Substring(2), out num) &&
DateTime.TryParse(item.OrderDate, out dtOrderdate) &&
item.ModelNbr.StartsWith("ML") && item.ModelNbr.Substring(2).Length == 3 && int.TryParse(item.ModelNbr.Substring(2), out num) &&
int.TryParse(item.Quantity, out num) && DateTime.TryParse(item.DeliveryDate, out dtdeliverydate) && (Convert.ToDateTime(item.DeliveryDate) - Convert.ToDateTime(item.OrderDate)).TotalDays > 7)
{
item.ValidFlag = "V";
}
else
{
item.ValidFlag = "E";
}
validList.Add(item);
}
}
return validList;
}
public bool InsertOrderData(List<Order> Orders, SqlConnection connectionString)
{
bool bret = true;
{
if(Orders !=null && Orders.Count >0)
{
foreach(var item in Orders)
{
using (SqlCommand command = connectionString.CreateCommand())
{
command.CommandText = "Insert into SBA.Orders(OrderId,SalesPersonId,OrderDate,ModelNbr,Quantity,CustomerId,Deliverydate,ValidFlag) Values('" + item.OrderId + "','" + item.SalesPersonId + "','" + item.OrderDate + "','" + item.ModelNbr + "','" + item.Quantity + "','" + item.CustomerId + "','" + item.DeliveryDate + "','" + item.ValidFlag + "')";
command.Connection = connectionString;
connectionString.Open();
int count = command.ExecuteNonQuery();
connectionString.Close();
if (count > 0)
{
bret = true;
}
else
bret = false;
}
}
}
else
{
bret = false;
}
}
return bret;
}
public DataTable GetProductsCommission(SqlConnection connectionString)
{
DataTable dtProductsCommission = null;
using (SqlCommand command = connectionString.CreateCommand())
{
command.CommandText = "Select ModelNbr,Commission_Percentage,Base_Price from SBA.Product_Commission";
command.Connection = connectionString;
connectionString.Open();
SqlDataAdapter da = new SqlDataAdapter(command);
DataSet ds = new DataSet();
da.Fill(ds);
dtProductsCommission = ds.Tables[0];
}
return dtProductsCommission;
}
public bool InsertCommissionData(List<Order> Orders, DataTable dtProductsCommission, SqlConnection connectionString)
{
bool bret = true;
if (Orders != null && Orders.Count > 0 && dtProductsCommission.Rows.Count > 0)
{
foreach (var item in Orders)
{
if (item.ValidFlag == "V")
{
foreach (DataRow dr in dtProductsCommission.Rows)
{
float commamt = Convert.ToInt32(dr["Commission_Percentage"]) * Convert.ToInt32(dr["Base_Price"]) * Convert.ToInt32(item.Quantity);
using (SqlCommand cmd = connectionString.CreateCommand())
{
cmd.CommandText = "Insert into SBA.Order_Commission(OrderId,CommissionAmt) Values('" + item.OrderId + "','" + commamt + "')";
connectionString.Open();
cmd.ExecuteNonQuery();
connectionString.Close();
bret = true;
}
}
}
}
}
else
{
bret = false;
}
return bret;
}
public bool CopyToArchive(string sourceFileName, string sourceFilePath, string archiveFileName, string archiveFilePath)
{
bool bret = true;
if(!File.Exists(archiveFilePath + archiveFileName))
{
File.Copy(sourceFilePath + sourceFileName, archiveFilePath + archiveFileName);
}
else
{
File.Delete(archiveFilePath + archiveFileName);
File.Copy(sourceFilePath + sourceFileName, archiveFilePath + archiveFileName);
}
return bret;
}
}
}
I have fixed this problem.Please refer this program for more details
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Data;
using System.Xml.Serialization;
using System.Text.RegularExpressions;
using System.Xml;
namespace EmployeeValidation
{
public class FundsValidator
{
public void ProcessData(string FilePath, string FileName, SqlConnection connection, string errorFilename, string errorFilepath)
{
List<Funds> Alllstfunds = new List<Funds>();
List<Funds> Validlstfunds = new List<Funds>();
Alllstfunds= ReadValuesfromInputfile(FilePath, FileName);
Validlstfunds = GetValidFunds(Alllstfunds, errorFilename, errorFilepath);
SaveValidListToDB(Validlstfunds,connection);
List<Funds> Removeddup= GerPerFundDetails(Validlstfunds);
CalculateNavandSaveToDatabase(Removeddup,connection);
}
public List<Funds> ReadValuesfromInputfile(string FilePath, string FileName)
{
List<Funds> AllListfunds = new List<Funds>();
string s1= null;
StreamReader sw = File.OpenText(FilePath + FileName);
while ((s1 = sw.ReadLine()) != null)
{
Funds fund = new Funds();
string[] s = s1.Split(',');
fund.FundsID = s[0].ToString();
fund.SubfundID = s[1].ToString();
fund.Asset = s[2].ToString();
fund.La = s[3].ToString();
fund.o = s[4].ToString();
AllListfunds.Add(fund);
}
return AllListfunds;
}
public List<Funds> GetValidFunds(List<Funds> Alllstfunds, string errorFilename,string errorFilepath)
{
try
{
List<Funds> validlist = new List<Funds>();
List<Funds> Invalid = new List<Funds>();
foreach (Funds x in Alllstfunds)
{
bool valid = true;
valid = valid && (!string.IsNullOrEmpty(x.FundsID) && x.FundsID.StartsWith("F")) && x.FundsID.Length == 4 && x.FundsID.Substring(1).Length == 3 && x.FundsID.Substring(1).All(char.IsDigit);
valid = valid && (!string.IsNullOrEmpty(x.SubfundID)) && x.SubfundID.StartsWith("SF") && x.SubfundID.Length == 5 && x.SubfundID.Substring(2).Length == 3 && x.SubfundID.Substring(2).All(char.IsDigit);
valid = valid && (!string.IsNullOrEmpty(x.Asset)) && x.Asset.All(char.IsDigit);
valid = valid && (!string.IsNullOrEmpty(x.La)) && x.La.All(char.IsDigit);
valid = valid && (!string.IsNullOrEmpty(x.o)) && x.o.All(char.IsDigit);
if (valid)
{
validlist.Add(x);
}
else
{
Invalid.Add(x);
}
}
SaveInValidinErrorTxt(Invalid, errorFilename, errorFilepath);
return validlist;
}
catch (Exception ex)
{
throw new FundsValidatorException(ex.Message);
}
}
public void SaveInValidinErrorTxt(List<Funds> Invalid,string errorFilename,string errorFilepath)
{
if (Invalid.Count > 0 && Invalid != null)
{
if (!File.Exists(errorFilepath + errorFilename))
{
var i=File.Create(errorFilepath + errorFilename);
i.Close();
}
StreamWriter sw = File.AppendText(errorFilepath+errorFilename);
foreach (Funds f in Invalid)
{
sw.WriteLine(f.FundsID+","+f.SubfundID+","+f.Asset+","+f.La+","+f.o);
}
sw.Flush();
sw.Close();
}
}
public void SaveValidListToDB(List<Funds> Validlstfunds, SqlConnection connection)
{
try
{
foreach (Funds f in Validlstfunds)
{
connection.Open();
SqlCommand cmd = new SqlCommand(("Insert into SBA.Fund_Details (FundId,SubFundId,Assets,Liabilities,OutstandingShares) Values ( '" + f.FundsID + "','" + f.SubfundID + "','" + f.Asset + "','" + f.La + "','" + f.o + "')"), connection);
int i = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
connection.Close();
}
}
catch (Exception ex)
{
throw new FundsValidatorException(ex.Message);
}
}
public List<Funds> GerPerFundDetails(List<Funds> Validlists)
{
List<string> s = new List<string>();
List<Funds> RemoveDup = new List<Funds>();
String[] r = (from a in Validlists
select a.FundsID).Distinct().ToArray();
foreach (String x in r)
{
int assetnum = 0;
int lanum = 0;
int onum=0;
foreach (Funds q in Validlists)
{
if (x.ToString() == q.FundsID)
{
assetnum = assetnum + int.Parse(q.Asset);
lanum=lanum+int.Parse(q.La);
onum=onum+int.Parse(q.o);
}
}
Funds f= new Funds();
f.FundsID=x.ToString();
f.Asset=assetnum.ToString();
f.La=lanum.ToString();
f.o= onum.ToString();
RemoveDup.Add(f);
}
return RemoveDup;
}
public void CalculateNavandSaveToDatabase(List<Funds> Removeddup,SqlConnection connection)
{
List<Funds> NAVClaculated = new List<Funds>();
foreach(Funds item in Removeddup)
{
item.NAV= (float)(Math.Round(((float.Parse(item.Asset) - float.Parse(item.La))/(float.Parse(item.o))),2));
NAVClaculated.Add(item);
}
foreach (Funds f in NAVClaculated)
{
connection.Open();
SqlCommand cmd = new SqlCommand(("Insert into SBA.Nav_Report (FundId,Assets,Liabilities,OutstandingShares,Nav) Values ( '" + f.FundsID + "','" + f.Asset + "','" + f.La + "','" + f.o +"','"+f.NAV+ "')"), connection);
int i = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
connection.Close();
}
}
}
}
namespace Tarriffs
{
public class Tariff
{
public string UserId { get; set; }
public string UserName { get; set; }
public string Category { get; set; }
public string LastMeterReading { get; set; }
public string CurrentMeterReading { get; set; }
public string ReadingDate { get; set; }
public string NoofUnits { get; set; }
public string CalculatedAmount { get; set; }
}
class Program
{
static void Main(string[] args)
{
string inputfile = #"D:\Tarriffs\Input file\Tarriff_0919.txt";
List<Tariff> read = new List<Tariff>();
StreamReader sr = File.OpenText(inputfile);
string s= null;
while((s= sr.ReadLine())!=null)
{
string[] item = s.Split(',');
Tariff tar = new Tariff();
tar.UserId= item[0];
tar.UserName= item[1];
tar.Category= item[2];
tar.LastMeterReading= item[3];
tar.CurrentMeterReading= item[4];
tar.ReadingDate= item[5];
bool valid = validandlogger(tar.UserId, tar.UserName, tar.Category, tar.LastMeterReading, tar.CurrentMeterReading, tar.ReadingDate);
if (valid)
{
double[] tarriffcalculation = tarriffcalc(tar.LastMeterReading, tar.CurrentMeterReading);
Tariff final = new Tariff();
final.UserId = item[0];
final.UserName = item[1];
final.NoofUnits = tarriffcalculation[0].ToString();
final.CalculatedAmount = tarriffcalculation[1].ToString();
SqlConnection conn= new SqlConnection(#"Data Source=NA03OSDVP00746\SQLEXPRESS;Initial Catalog=DBTarriffValidation;Integrated Security=True");
conn.Open();
SqlCommand cmd = new SqlCommand("Insert into dbo.custom values ('" + final.UserId + "','" + final.UserName + "','" + final.NoofUnits + "','" + final.CalculatedAmount + "')", conn);
int i = cmd.ExecuteNonQuery();
conn.Close();
}
}
}
public static bool validandlogger(string UserId, string UserName, string Category, string LastMeterReading, string CurrentMeterReading, string ReadingDate)
{
bool valid = true;
DateTime dt;
Regex name = new Regex("^[a-zA-Z0-9]{6}$");
valid = valid && (!string.IsNullOrEmpty(UserId)) && UserId.All(char.IsDigit);
valid = valid && (!string.IsNullOrEmpty(UserName)) && name.IsMatch(UserName);
string[] vcategory = { "COM", "DOM", "OTD" };
valid = valid && vcategory.Contains(Category);
valid = valid && LastMeterReading.All(char.IsDigit);
valid = valid && CurrentMeterReading.All(char.IsDigit);
valid = valid && DateTime.TryParseExact(ReadingDate, "MM/dd/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out dt);
if (!valid)
{
string errortextfile = #"D:\Tarriffs\Error_log\";
string errorfile = "Error_"+DateTime.Now.ToString("MMyyyy")+".txt";
if (!File.Exists(errortextfile + errorfile))
{
var i = File.Create(errortextfile + errorfile);
i.Close();
}
StreamWriter sw = File.AppendText(errortextfile + errorfile);
sw.WriteLine(UserId + "," + UserName + "," + Category + "," + LastMeterReading + "," + CurrentMeterReading + "," + ReadingDate);
sw.Flush();
sw.Close();
}
else
{
return true;
}
return false;
}
public static double[] tarriffcalc(string LastMeterReading, string CurrentMeterReading)
{
int LMeterReading = 0;
int CMeterReading = 0;
LMeterReading = int.Parse(LastMeterReading);
CMeterReading = int.Parse(CurrentMeterReading);
int units = CMeterReading - LMeterReading;
double totalamount = 0;
if (units <= 100)
{
var baserate = 20;
totalamount = (units * 1) + baserate;
}
else if (units <= 200)
{
var baserate = 20;
totalamount = (units * 1.5) + baserate;
}
else if (units <= 500)
{
var baserate = 40;
totalamount = 250 +((units-200)*3)+baserate;
}
else if (units > 500)
{
var baserate = 40;
totalamount = 1700 + ((units - 500) * 5.75) + baserate;
}
return new double[] {units,totalamount};
}
}
}

"Out Of Memory" exception while exporting from SQL Server to Excel, using EPPlus library

I'm using the EPPlus .NET library in order to export data from SQL Server to an Excel file.
I'm using the SqlConnection class to read the data. For every row of the SqlDataReader cursor, I iterate through all the excel cells for the corresponding row, and enter the data from the reader.
The issue is that I'm getting an "out of memory" error when im using this function for large tables. I need a method to create some kind of a buffer inside the Read CURSOR.
A concise code example:
Dim sqlConnection As SqlConnection = New SqlConnection()
sqlConnection.ConnectionString = sqlConnectionString.ConnectionString 'connectionstring built before
Dim query As SqlCommand = New SqlCommand(query...)
Dim newFileStream As New FileStream("c:\junk\test.xlsx", System.IO.FileMode.Create,System.IO.FileAccess.ReadWrite)
Using excelApp As New ExcelPackage(newFileStream)
sqlConnection.Open()
Dim sqlReader As SqlDataReader = query.ExecuteReader()
Dim numOfColumns As Byte = sqlReader.FieldCount()
Dim rowNumber As Integer = 1
While sqlReader.Read()
Dim currentColumn As Byte
For currentColumn = 1 To numOfColumns
ws.Cells(rowNumber,currentColumn).Value = sqlReader.Item(currentColumn - 1)
Next
rowNumber += 1
End While
excelApp.Save()
End Using
newFileStream.Close()
Since you will have to split the files anyway when you hit Excel's limits, here's some code that reads from the database in chunks into multiple Excel files:
static class Program
{
private static string _dataSource;
private static string _database;
private static string _table;
private static string _outputPath;
private static int _batchSize;
public static void Main()
{
try
{
_dataSource = ConfigurationManager.AppSettings["DataSource"];
_database = ConfigurationManager.AppSettings["Database"];
_table = ConfigurationManager.AppSettings["Table"];
_outputPath = ConfigurationManager.AppSettings["OutputPath"];
_batchSize = int.Parse(ConfigurationManager.AppSettings["BatchSize"]);
CreateExcel(_dataSource, _database, _table, _outputPath, "SELECT * FROM " + _table);
}
catch (Exception e)
{
Console.WriteLine(e);
}
Console.WriteLine("All done!");
}
public static void CreateExcel(string dataSource, string databaseName, string tableName, string outputFilePath, string queryNoParameters)
{
var sqlConnectionString = new SqlConnectionStringBuilder
{
DataSource = dataSource,
InitialCatalog = databaseName,
IntegratedSecurity = true
};
using (var connection = new SqlConnection(sqlConnectionString.ConnectionString))
{
connection.Open();
using (var command = new SqlCommand { Connection = connection, CommandType = CommandType.Text, CommandText = queryNoParameters })
using (var sqlReader = command.ExecuteReader())
{
int i = 0;
while (WriteExcelFile(tableName, GetFileInfo(databaseName, tableName, outputFilePath, i++),
sqlReader, sqlReader.FieldCount, _batchSize))
{
Console.WriteLine("Reading next batch...");
}
}
}
}
private static bool WriteExcelFile(string tableName, FileInfo fileInfo, IDataReader sqlReader, int numOfColumns, int count)
{
using (var excelPackage = new ExcelPackage(fileInfo))
{
ExcelWorksheet worksheet = excelPackage.Workbook.Worksheets.Add(tableName);
Console.WriteLine("Populating header row...");
for (var currentColumn = 1; currentColumn <= numOfColumns; currentColumn++)
{
worksheet.Cells[1, currentColumn].Value = sqlReader.GetName(currentColumn - 1);
worksheet.Column(currentColumn).Style.Numberformat.Format =
TranslateSystemtypeToExceltype(sqlReader.GetFieldType(currentColumn - 1));
}
Console.WriteLine("Reading data rows...");
int rowNumber = 2;
while (rowNumber <= count + 1 && sqlReader.Read())
{
for (var currentColumn = 1; currentColumn <= numOfColumns; currentColumn++)
worksheet.Cells[rowNumber, currentColumn].Value = sqlReader[currentColumn - 1];
rowNumber++;
}
if (rowNumber == 2) //nothing read
{
Console.WriteLine("Nothing to read, reached end of table!");
return false;
}
Console.WriteLine("Saving Excel file...");
excelPackage.Save();
return rowNumber == count + 2; //in which case we want to read more
}
}
private static FileInfo GetFileInfo(string databaseName, string tableName, string outputFilePath, int i)
{
return new FileInfo(Path.Combine(outputFilePath,
Path.ChangeExtension(
string.Format("{0}_{1}_{2}", databaseName, tableName.Replace('.', '-'), i), "xlsx")));
}
public static string TranslateSystemtypeToExceltype(Type sysType)
{
if (sysType == typeof(string))
return "#";
if (sysType == typeof(DateTime))
return "dd/MM/YYYY";
if (sysType == typeof(Decimal))
return "0.000";
if (sysType == typeof(bool))
return "#";
if (sysType == typeof(int))
return "0";
if (sysType == typeof(short))
return "0";
if (sysType == typeof(double))
return "0.000";
return "General";
}
}

Rewriting from MonoTouch Application to MonoDroid

I'm going to rewrite the application from Monotouh to Monodroid application for android. Correct me if I'm wrong. The logic remains the same as in MonoTouch or change anything? If something changes, please tell me, what?
As far as I understand, only GIU changes. Thanks in advance!
So, this is my code where i call data from my server:
namespace Mobile{
public static class SiteHelper
{
public static string DbPath = Path.Combine (Environment.GetFolderPath (Environment.SpecialFolder.Personal), "Sql_1.4.sqlite");
public const string TempDbPath = "./Sql.sqlite";
public static UIView View { get; set; }
public static BaseController Controller { get; set; }
private static event NIHandler _noInternetHandler;
private static bool _noInternetShoved = false;
public static string SiteDomain = "http://mysite.com"; //files which connecting to the DB on server (.asx files)
private delegate void NIHandler ();
public static XDocument DoRequest (string Request)
{
if (_noInternetHandler != null) {
foreach (var del in _noInternetHandler.GetInvocationList()) {
_noInternetHandler -= del as NIHandler;
}
}
if (Controller != null)
_noInternetHandler += new NIHandler (Controller.PushThenNoInternet);
string CryptoString = "";
string Language = "ru";
using (MD5 md5Hash = MD5.Create()) {
string hashKey = Guid.NewGuid ().ToString ().Substring (0, 4);
CryptoString = Request + (Request.Contains ("?") ? "&" : "?") + "hash=" + GetMd5Hash (
md5Hash,
"myprogMobhash_" + hashKey
) + "&hashKey=" + hashKey + "&language=" + Language;
UIActivityIndicatorView _preloader = null;
if (Controller != null) {
Controller.InvokeOnMainThread (delegate() {
_preloader = new UIActivityIndicatorView (UIActivityIndicatorViewStyle.Gray);
if (View != null && Request.IndexOf ("login.ashx") == -1
&& Request.IndexOf ("yandex") == -1
&& Request.IndexOf ("GetDialogMessages") == -1) {
lock (_preloader) {
if (_preloader != null && !_preloader.IsAnimating)
_preloader.HidesWhenStopped = true;
_preloader.Frame = new RectangleF (150, 170, 30, 30);
_preloader.Transform = MonoTouch.CoreGraphics.CGAffineTransform.MakeScale ((float)1.3, (float)1.3);
_preloader.StartAnimating ();
View.Add (_preloader);
}
}
});
}
/*ctx.GetText(Resource.String.SiteAddress)*/
Stream Stream = null;
try {
HttpWebRequest request = new HttpWebRequest (new Uri (SiteDomain + "/FolderWithFiles/" + CryptoString));
request.Timeout = 8000;
Stream = request.GetResponse ().GetResponseStream ();
_noInternetShoved = false;
if (_noInternetHandler != null)
_noInternetHandler -= new NIHandler (Controller.PushThenNoInternet);
} catch (WebException) {
if (_noInternetHandler != null)
_noInternetHandler.Invoke ();
var resp = new XDocument (new XElement ("Response",
new XElement ("status", "error"),
new XElement ("error", "Отсутствует интернет"))
);
return resp;
}
StreamReader Sr = new StreamReader (Stream);
string Resp = Sr.ReadToEnd ();
XDocument Response = XDocument.Parse (Resp.Substring (0, Resp.IndexOf ("<html>") == -1 ? Resp.Length : Resp.IndexOf ("<!DOCTYPE html>")));
string Hash = Response.Descendants ().Where (x => x.Name == "hash")
.FirstOrDefault ().Value;
string HashKey = Response.Descendants ().Where (x => x.Name == "hashKey")
.FirstOrDefault ().Value;
Sr.Close ();
Stream.Close ();
if (Controller != null && _preloader != null) {
Controller.InvokeOnMainThread (delegate() {
lock (_preloader) {
_preloader.StopAnimating ();
_preloader.RemoveFromSuperview ();
}
});
}
if (VerifyMd5Hash (
md5Hash,
"mobileSitehash_" + HashKey,
Hash
))
return Response;
else
throw new Exception ();
}
}
public static XDocument DoWriteFileRequest (string Request, byte[] file)
{
string CryptoString = "";
string Language = "ru";
using (MD5 md5Hash = MD5.Create()) {
string hashKey = Guid.NewGuid ().ToString ().Substring (0, 4);
CryptoString = Request + (Request.Contains ("?") ? "&" : "?") + "hash=" + GetMd5Hash (
md5Hash,
"mobileMobhash_" + hashKey
) + "&hashKey=" + hashKey + "&language=" + Language;
HttpWebRequest Req = (HttpWebRequest)WebRequest.Create (SiteDomain + "/misc/mobile/" + CryptoString);
Req.Method = "POST";
Stream requestStream = Req.GetRequestStream ();
requestStream.Write (file, 0, file.Length);
requestStream.Close ();
Stream Stream = Req.GetResponse ().GetResponseStream ();
StreamReader Sr = new StreamReader (Stream);
string Resp = Sr.ReadToEnd ();
XDocument Response = XDocument.Parse (Resp);
string Hash = Response.Descendants ().Where (x => x.Name == "hash")
.FirstOrDefault ().Value;
string HashKey = Response.Descendants ().Where (x => x.Name == "hashKey")
.FirstOrDefault ().Value;
Sr.Close ();
Stream.Close ();
if (VerifyMd5Hash (
md5Hash,
"mobileSitehash_" + HashKey,
Hash
))
return Response;
else
throw new Exception ();
}
}
public static string GetMd5Hash (MD5 md5Hash, string input)
{
// Convert the input string to a byte array and compute the hash.
byte[] data = md5Hash.ComputeHash (Encoding.UTF8.GetBytes (input));
// Create a new Stringbuilder to collect the bytes
// and create a string.
StringBuilder sBuilder = new StringBuilder ();
// Loop through each byte of the hashed data
// and format each one as a hexadecimal string.
for (int i = 0; i < data.Length; i++) {
sBuilder.Append (data [i].ToString ("x2"));
}
// Return the hexadecimal string.2
return sBuilder.ToString ();
}
//Geting the info for my app
public static List<PackageListModel> GetUserPackages (int UserID)
{
List<PackageListModel> Events = new List<PackageListModel> ();
string Req = "SomeFile.ashx?UserID=" + UserID;
XDocument XmlAnswer = DoRequest (Req);
if (XmlAnswer.Descendants ("status").First ().Value == "ok") {
foreach (var el in XmlAnswer.Descendants ("Response").First ().Descendants().Where(x=>x.Name == "Event")) {
PackageListModel Event = null;
Event = new PackageListModel ()
{
ID = int.Parse(el.Attribute("ID").Value),
Title = el.Element("Title").Value,
Date = el.Element("Date").Value,
Price = el.Element("Price").Value,
ImageUrl = el.Element("ImageUrl").Value,
Location = el.Element("Location").Value
};
Events.Add (Event);
}
}
return Events;
}
//Получить пользовательские поездки
public static List<TransporterListModel> GetUserTransporters (int UserID)
{
List<TransporterListModel> Events = new List<TransporterListModel> ();
string Req = "SomeFile.ashx?UserID=" + UserID;
XDocument XmlAnswer = DoRequest (Req);
if (XmlAnswer.Descendants ("status").First ().Value == "ok") {
foreach (var el in XmlAnswer.Descendants ("Response").First ().Descendants().Where(x=>x.Name == "Event")) {
TransporterListModel Event = null;
Event = new TransporterListModel ()
{
ID = int.Parse(el.Attribute("ID").Value),
Date = el.Element("Date").Value,
Price = el.Element("Price").Value,
TransportsStr = el.Element("Transports").Value,
Location = el.Element("Location").Value
};
Events.Add (Event);
}
}
return Events;
}
}
}
}
I think you should read this.
In brief - you can reuse application logic that not depends on platform-specific parts, so working with database/server can be shared between MonoTouch and Mono for Android.

How to create a new table in a database with program that uses entity framework?

I have a piece of software out in the field and I need to add a new table to it. I have the table in my entity framework and new clients get the table. How to I update the others?
ADDED: To make it clear my development and new clients have the table. How to update the older clients databases is the question?
Since it is in my model it seems I should just call a create method and everything should happen under the hood.
_context.NewTable.CreateTable();
But think that I will have to write a sql command string to see if table exists and if it doesn't to create the table.
IDVisitorEntities _context = new IDVisitorEntities ();
String cmd = IF NOT EXISTS ( SELECT [name]
FROM sys.tables
WHERE [name] = NewTable )
CREATE TABLE NewTable (
ID int IDENITY,
NAME VARCHAR(40))
_context.NewTable.CommandText (cmd);
I want to only run this one time if the table doesn't exist. So that doesn't solve that problem. I really don't know what to do.
ADDED 5/6/2013
I'm thinking that EF has the Property Collection for each table and that might hold a clue. Might have to use ICustomTypeDescriptor ... Anyone else have any thoughts?
Added 7/15/2013
I started building it, at my new job, here is a sample. I need to create a file(s) with the partial classes and have the abstract and interface applied to them. It has a long way to go but this is a start...
namespace DataModelMAXFM
{
public abstract class ATable
{
private ArrayList _columns = new ArrayList();
private ArrayList colsToAdd = new ArrayList();
public ArrayList Columns
{
get
{
return _columns;
}
}
public bool TableCreate(SqlConnection sqlConn)
{
//assuming table needs to be created (already checked)
//get column list
//use for loop to create query string
// run command
ITable thisItable;
if (Columns.Count <= 0) //generate column list if not already created
{
if (!ColumnList())
return false;
}
if (this is ITable)
{
thisItable = (ITable) this;
}
else
{
throw new Exception("");
}
StringBuilder sb = new StringBuilder("CREATE TABLE " + thisItable.GetTableName() + " (");
bool flgFirst = true; // to allow for proper comma placement
foreach (PropertyInfo prop in Columns)
{
String propType = this.GetDataType(prop);
if (propType == String.Empty)//check to make sure datatype found a match, EF to SQL
{
return false;
}
if (!flgFirst)
{
sb.Append(", ");
}
else
{
flgFirst = false;
}
sb.Append(prop.Name + " " + propType);
}
// add right parentheses
sb.Append(")");
//now run query created above
SqlCommand com;
try
{
com = new SqlCommand(sb.ToString(), sqlConn);
com.ExecuteNonQuery();
}
catch (Exception e)
{
Console.WriteLine("TableCreate e:" + e.ToString());
return false;
}
return true;
}
public bool TableExists(SqlConnection sqlConn)
{
SqlDataReader sdr = null;
SqlCommand com;
ITable thisItable;
try
{
//create and execute command
if (this is ITable)
thisItable = (ITable)this;
else
{
throw new Exception("");
}
com = new SqlCommand("Select * from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = " + thisItable.GetTableName(), sqlConn);
sdr = com.ExecuteReader();
if (!sdr.HasRows)//ie table does not exist
{
return false;
}
}
catch (Exception e)
{
Console.WriteLine("TableCreate e:" + e.ToString());
return false;
}
//close datareader
try
{
sdr.Close();
}
catch (Exception e)
{
Console.WriteLine("close sqldatareader TableExists e: " + e.ToString());
}
return true;
}
public bool ColumnList()
{
bool flgListCreated = false;
PropertyInfo[] propList = typeof(TransactionCategory).GetProperties();
foreach (PropertyInfo prop in propList)
{
if (prop.CanRead && prop.CanWrite)
{
MethodInfo mget = prop.GetGetMethod(false);
MethodInfo mset = prop.GetSetMethod(false);
// Get and set methods have to be public
if (mget == null)
{
continue;
}
if (mset == null)
{
continue;
}
Columns.Add(prop);
if (!flgListCreated)
{
flgListCreated = true;
}
}
}
return flgListCreated;
}
public bool ColumnsExist(SqlConnection sqlConn)
{
ITable thisItable;
if (Columns.Count <= 0)
{
if (!ColumnList())
return false;
}
//2013-07-10 create basic connection and data reader
if (this is ITable)
thisItable = (ITable)this;
else
{
throw new Exception("");
}
SqlDataReader sdr = null;
SqlCommand com;
foreach (PropertyInfo prop in Columns)
{
try
{
//create and execute command
com = new SqlCommand("Select * from INFORMATION_SCHEMA.COLUMNS where TABLE_NAME = " + thisItable.GetTableName() + " and COLUMN_NAME = " + prop.Name, sqlConn);
sdr = com.ExecuteReader();
//if no rows returned to datareader == column does not exist, add to ArrayList of columns to add
if (!sdr.HasRows)
colsToAdd.Add(prop);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
return false;
}
}
//close datareader
try
{
sdr.Close();
}
catch (Exception e)
{
Console.WriteLine("close sqldatareader ColumnsExist e: " + e.ToString());
}
if (colsToAdd.Count == 0)
return false;
//returns true only if method worked and found columns to add to DB
return true;
}
public bool ColumnsCreate(SqlConnection sqlConn)
{
ITable thisItable;
StringBuilder sb = new StringBuilder();
if (colsToAdd.Count <= 0)
{
if (!ColumnsExist(sqlConn)) //2013-07-08 - MAXIMUS\58398(BJH) //if no columns, attempt to create list
return false; // if Column list was not created, return false
}
// add a array of the alter table
if (this is ITable)
thisItable = (ITable)this;
else
{
throw new Exception();
}
sb.Append("ALTER TABLE " + thisItable.GetTableName() + " ADD ( ");
bool flgFirst = true; // allows for no leading comma on first entry
String propType;
foreach (PropertyInfo prop in colsToAdd)
{
//make sure SQL datatype can be determined from EF data
propType = this.GetDataType(prop);
if (propType == String.Empty)
throw new Exception("no datatype match found " + prop.Name + " " + prop.PropertyType.ToString());
if (!flgFirst)
{
sb.Append(", ");
}
else
{
flgFirst = false;
}
sb.Append(prop.Name + " " + propType);
}
sb.Append(" )");
SqlCommand com;
try
{
com = new SqlCommand(sb.ToString(), sqlConn);
com.ExecuteNonQuery();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
return false;
}
return true;
}
public bool ColumnsUpdate(SqlConnection sqlConn)
{
if (ColumnsExist(sqlConn))
return ColumnsCreate(sqlConn);
else
return false;
}
//method to convert from EF to SQL datatypes, see noted issues
public String GetDataType(PropertyInfo pi)
{
String s = "";
String pistr = pi.PropertyType.ToString();
switch (pistr)
{
case "Byte[]":
s = "binary";
break;
case "Boolean":
s = "bit";
break;
case "String Char[]": // also maps to other options such as nchar, ntext, nvarchar, text, varchar
s = "char";
break;
case "DateTime":
s = "datetime";
break;
case "DateTimeOffset":
s = "datetimeoffset";
break;
case "Decimal":
s = "decimal";
break;
case "Double":
s = "float";
break;
case "Int16":
s = "smallint";
break;
case "Int32":
s = "int";
break;
case "Int64":
s = "bigint";
break;
case "Single":
s = "real";
break;
case "TimeSpan":
s = "time";
break;
case "Byte":
s = "tinyint";
break;
case "Guid":
s = "uniqueidentifier";
break;
case "Xml":
s = "xml";
break;
default:
Console.WriteLine("No datatype match found for " + pi.ToString() + " " + pi.PropertyType.ToString());
return String.Empty;
}
return s;
}
}
public interface ITable
{
int ID
{
get;
}
bool TableUpdate(SqlConnection sqlConn);
bool TableStoredProceduresCreate(SqlConnection sqlConn);
bool TableStoredProceduresDrop(SqlConnection sqlConn);
bool TableCreateTriggers(SqlConnection sqlConn);
bool TableCreateViews(SqlConnection sqlConn);
DataTable GetDataTable();
DateTime dtTableImplemented
{
get;
}
String GetTableName();
}
}
How to I update the others?
And how do you upgrade code of others to require that table? Probably by using some patch or upgrade package and this package should create your table as well.
Since it is in my model it seems I should just call a create method and everything should happen under the hood.
No. EF itself has nothing to define database schema (Except creating SQL script for whole database creation). What you are looking for is possible with EF Migrations but that is feature of EF 4.3 and newer when using code first and DbContext API.