i m making wcf service for login. my code for accesssing db data using linq is :
var result = from detail in dc.tbl_User_Masters where detail.User_Type_Id == 2
select new UserVerification
{
Uname = detail.User_Login_Name,
Password = detail.User_Pwd
};
where UserVerification is class which has Uname and Password properties stored..now how to check that variable that if they are null then we'll not allow login...i dont know how to do that with linq..
You probably need to filter on the user/password you're trying to authenticate:
var givenUname = "robertpaulson";
var givenPassword = "bob";
var result = (
from detail in dc.tbl_User_Masters
where detail.User_Type_Id == 2
where detail.User_Login_Name == givenUname && detail.User_Pwd == givenPassword
select detail
).SingleOrDefault();
Now result will either be null or have the details for the authenticated user.
You don't have to do that in Linq. You have completed your linq part.
You may use
if (result == null) {//code for stoping the login process}
or
if (result.UserName == null) {//code for stoping the login process}
Related
I'm trying to create login page using react front-end and ASP .NET core Back-end.
SO while a user login to the system I have to use the query like
Select * from UserLogin where email="asbhf#gmail.com"
so that my API URL should be
https://localhost:44383/api/UserLogins?email="asbhf#gmail.com"
So that, I tried this code in my UserLoginController.cs
// GET: api/UserLogins?email="asd#gmail.com"
public async Task<IActionResult> GetUserLogin([FromRoute] string email)
{
if (email == null)
{
return NotFound();
}
string query = "SELECT * FROM UserLogin WHERE email = #email";
var UserLogin = await _context.UserLogin
.FromSql(query, email)
.Include(d => d.Username)
.AsNoTracking()
.FirstOrDefaultAsync();
if (UserLogin == null)
{
return NotFound();
}
return Ok(UserLogin);
}
but, It won't print any out put as I expect. Could you please give me any hint to solve my issue.
Firstly , The Include method specifies the related objects to include in the query results. It can be used to retrieve some information from the database and also want to include related entities , not specify the fields to return. For more details , you could refer to here.
Secondly , there are some errors in your data query section , try the following modification:
string query = $"SELECT Username FROM UserLogin WHERE email = #email";
var p1 = new SqlParameter("#email", email);
var UserLogin = await _context.UserLogin
.FromSql(query, p1)
.AsNoTracking()
.FirstOrDefaultAsync();
You could take a look at Executing Raw SQL Queries for the usage of FromSql.
I refer write sql query for entityframework
So my working code is
var UserLogin = _context.UserLogin.Where(c => c.Email == email);
I need to check if users logging into the console application I am making are part of a DL (let's call it DL-A).
Some users aren't directly part of DL-A, but of other DLs that are a member of DL-A. The code that I have working only checks the groups of which the user is directly a member of. How do I check this?
PrincipalContext ctx = new PrincipalContext(ContextType.Domain, domain);
UserPrincipal user = UserPrincipal.FindByIdentity(ctx, username);
GroupPrincipal group = GroupPrincipal.FindByIdentity(ctx, "DL-A");
if (user != null)
{
if (user.IsMemberOf(group))
{
...
}
}
One way you can see if the user is a member of a nested group is get all the users from a group recursively. I am using user and group from your code:
....
if (group != null)
{
var users = group.GetMembers(true); //this will get nested users
var contains = users.Contains(user);
if (contains)
{
//user found
}
}
...
I have to register a plugin on Quick Find search on "Artilce" entity. When user enter any thing in quick find text box on Article entity at that time my plugin execute and return filter the data based on our business logic.
1.What event is fired when we find using quick find.
2.What message passes when this event is fired.
I have tried registering the plugin on RetrieveMultiple message but this is not triggered when we click on search in quick find.
Please help.
We have a Plugin registered on the RetrieveMultiple. We had a business requirement to search for the records, using WildCard by default.
Plugin Registration Details:
Message: RetrieveMultiple
Primary Entity:None
Secondary Entity:None
Pre-Operation
Code:
public const String QueryLiteral = "Query";
public const String LIKE = "%";
public void Execute(IServiceProvider serviceProvider)
{
String ParentEntity = String.Empty;
String OriginalSearch = String.Empty;
// Obtain the execution context from the service provider.
var ContextInstance = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
// Get a reference to the Organization service.
IOrganizationService ServiceInstance =
((IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory))).
CreateOrganizationService(ContextInstance.InitiatingUserId);
// Critical Point here - NOTICE that the InputParameters Contains the word Query
if (ContextInstance.Depth < 2 && ContextInstance.InputParameters.Contains(QueryLiteral) &&
ContextInstance.InputParameters[QueryLiteral] is QueryExpression)
{
QueryExpression QueryPointer = (ContextInstance.InputParameters[QueryLiteral] as QueryExpression);
//Verify the conversion worked as expected - if not, everything else is useless
if (null != QueryPointer)
{
// Check if the request is coming from any Search View
// We know this b/c Criteria isn't null and the Filters Count > 1
if (null != QueryPointer.Criteria && QueryPointer.Criteria.Filters.Count > 1)
{
ParentEntity = ContextInstance.PrimaryEntityName;
OriginalSearch = QueryPointer.Criteria.Filters[1].Conditions[0].Values[0].ToString();
OriginalSearch = String.Format(CultureInfo.CurrentCulture,
"{0}{1}", LIKE, OriginalSearch);
}
ConditionExpression NewCondition = null;
FilterExpression NewFilter = null;
if (null != QueryPointer.Criteria)
{
//Change the default 'BeginsWith'Operator to 'Contains/Like' operator in the basic search query
foreach (FilterExpression FilterSet in QueryPointer.Criteria.Filters)
{
foreach (ConditionExpression ConditionSet in FilterSet.Conditions)
{
if (ConditionSet.Operator == ConditionOperator.Like)
{
if (OriginalSearch != "")
ConditionSet.Values[0] = OriginalSearch;
else
{
OriginalSearch = QueryPointer.Criteria.Filters[0].Conditions[0].Values[0].ToString();
OriginalSearch = String.Format(CultureInfo.CurrentCulture,
"{0}{1}", LIKE, OriginalSearch);
ConditionSet.Values[0] = OriginalSearch;
}
}
}
}
}
}
ContextInstance.InputParameters[QueryLiteral] = QueryPointer;
}
}
Check details on this Post: http://www.williamgryan.mobi/?p=596
We have raised a ticket with Microsoft to address this situaation.
The solution they provided was to modify the Database to make the message
SearchByTitleKbArticleRequest available in the plugin registration tool.
I currently dont remember the table that we updated a flag against these messages.
After updating the table we were able to register the plugin against the message
SearchByTitleKbArticleRequest
Then the plugin triggered and we modified the entity collection returned from there.
So I have a standard service reference proxy calss for MS CRM 2013 (i.e. right-click add reference etc...) I then found the limitation that CRM data calls limit to 50 results and I wanted to get the full list of results. I found two methods, one looks more correct, but doesn't seem to work. I was wondering why it didn't and/or if there was something I'm doing incorrectly.
Basic setup and process
crmService = new CrmServiceReference.MyContext(new Uri(crmWebServicesUrl));
crmService.Credentials = System.Net.CredentialCache.DefaultCredentials;
var accountAnnotations = crmService.AccountSet.Where(a => a.AccountNumber = accountNumber).Select(a => a.Account_Annotation).FirstOrDefault();
Using Continuation (something I want to work, but looks like it doesn't)
while (accountAnnotations.Continuation != null)
{
accountAnnotations.Load(crmService.Execute<Annotation>(accountAnnotations.Continuation.NextLinkUri));
}
using that method .Continuation is always null and accountAnnotations.Count is always 50 (but there are more than 50 records)
After struggling with .Continutation for a while I've come up with the following alternative method (but it seems "not good")
var accountAnnotationData = accountAnnotations.ToList();
var accountAnnotationFinal = accountAnnotations.ToList();
var index = 1;
while (accountAnnotationData.Count == 50)
{
accountAnnotationData = (from a in crmService.AnnotationSet
where a.ObjectId.Id == accountAnnotationData.First().ObjectId.Id
select a).Skip(50 * index).ToList();
accountAnnotationFinal = accountAnnotationFinal.Union(accountAnnotationData).ToList();
index++;
}
So the second method seems to work, but for any number of reasons it doesn't seem like the best. Is there a reason .Continuation is always null? Is there some setup step I'm missing or some nice way to do this?
The way to get the records from CRM is to use paging here is an example with a query expression but you can also use fetchXML if you want
// Query using the paging cookie.
// Define the paging attributes.
// The number of records per page to retrieve.
int fetchCount = 3;
// Initialize the page number.
int pageNumber = 1;
// Initialize the number of records.
int recordCount = 0;
// Define the condition expression for retrieving records.
ConditionExpression pagecondition = new ConditionExpression();
pagecondition.AttributeName = "address1_stateorprovince";
pagecondition.Operator = ConditionOperator.Equal;
pagecondition.Values.Add("WA");
// Define the order expression to retrieve the records.
OrderExpression order = new OrderExpression();
order.AttributeName = "name";
order.OrderType = OrderType.Ascending;
// Create the query expression and add condition.
QueryExpression pagequery = new QueryExpression();
pagequery.EntityName = "account";
pagequery.Criteria.AddCondition(pagecondition);
pagequery.Orders.Add(order);
pagequery.ColumnSet.AddColumns("name", "address1_stateorprovince", "emailaddress1", "accountid");
// Assign the pageinfo properties to the query expression.
pagequery.PageInfo = new PagingInfo();
pagequery.PageInfo.Count = fetchCount;
pagequery.PageInfo.PageNumber = pageNumber;
// The current paging cookie. When retrieving the first page,
// pagingCookie should be null.
pagequery.PageInfo.PagingCookie = null;
Console.WriteLine("#\tAccount Name\t\t\tEmail Address");while (true)
{
// Retrieve the page.
EntityCollection results = _serviceProxy.RetrieveMultiple(pagequery);
if (results.Entities != null)
{
// Retrieve all records from the result set.
foreach (Account acct in results.Entities)
{
Console.WriteLine("{0}.\t{1}\t\t{2}",
++recordCount,
acct.EMailAddress1,
acct.Name);
}
}
// Check for more records, if it returns true.
if (results.MoreRecords)
{
// Increment the page number to retrieve the next page.
pagequery.PageInfo.PageNumber++;
// Set the paging cookie to the paging cookie returned from current results.
pagequery.PageInfo.PagingCookie = results.PagingCookie;
}
else
{
// If no more records are in the result nodes, exit the loop.
break;
}
}
I am developing a wcf service for Windows 8 APP. But I'm choked up at one point.
The following method, it is coming data in the database using entity. But this the data returns back to a class type. My question , if result is null what can I sent person who will this method
public AnketorDTO AnketorBul(string tc, string pass)
{
_entity = new AnketDBEntities();
var result = (from i in _entity.Anketors
where i.TC == tc
where i.Sifre == pass
select i).ToList();
if (!result.Any())
-->>> return new AnketorDTO();
Anketor anketor = result.First();
return Converter.ConvertAnketorToAnketorDTO(anketor);
}
with this methot I SENT it by creating a new class type but part which use this methot does not work because the values become null. how can we prevent it.
Client :
AnketorDTO anketor = await client.AnketorBulAsync(txtKullanici.Text, txtSifre.Password);
**if (anketor != null)
lblError.Text = anketor.Adi;**
else
lblError.Text = "Hata";
Can you try this method to see, if it works?
_entity = new AnketDBEntities();
var result = _entity.Anketors.FirstOrDefault(yourexpressions);