How to append new node to existing node in xml - vb.net

Following is my xml file code
<XMLFile>
<EMail>
<From>
<Address>dddd#acd.com</Address>
</From>
<Receipent> <To>eeee#qwe.com</To> </Receipent>
<Subject>fffffsadasd</Subject>
<Body>ggggasdsd</Body>
</EMail>
</XMLFile>
i hve a sent button.On clicking that button each time i want to append Enail node and correponding childnodes to existing xml file.
In sent buttonclick i hve written following code.
Dim currNode As XmlNode
Dim doc As New XmlDocument
doc.LoadXml(("<XMLFile>" + " <EMail></EMail>" + "</XMLFile>"))
Dim docFrag As XmlDocumentFragment = doc.CreateDocumentFragment()
docFrag.InnerXml = "<From>" + " <Address>" + txtFrom.Text + " </Address>" + "</From>"
currNode = doc.DocumentElement.FirstChild
currNode.InsertAfter(docFrag, currNode.LastChild)
docFrag.InnerXml = "<Receipent>" + " <To>" + txtTo.Text + " </To>" + "</Receipent>"
currNode = doc.DocumentElement.FirstChild
currNode.InsertAfter(docFrag, currNode.LastChild)
docFrag.InnerXml = "<Subject>" + txtSubject.Text + "</Subject>"
currNode = doc.DocumentElement.FirstChild
currNode.InsertAfter(docFrag, currNode.LastChild)
docFrag.InnerXml = "<Body>" + txtBody.Text + "</Body>"
currNode = doc.DocumentElement.FirstChild
currNode.InsertAfter(docFrag, currNode.LastChild)
doc.Save("C:\xmlmailfile.xml")
What modification i have to make in button click


Something like this should do it. An XMLTextWriter might be better for your purposes though:
Private Function GenerateXML(ByVal emails As List(Of Email)) As String
Dim sb As New System.Text.StringBuilder
Using sw As New IO.StringWriter(sb), xt As New Xml.XmlTextWriter(sw)
xt.WriteStartElement("xmlDoc")
For i As Integer = 0 To emails.Count - 1
xt.WriteStartElement("email")
xt.WriteStartElement("From")
xt.WriteElementString("address", emails(i).From)
xt.WriteEndElement()
xt.WriteStartElement("Receipent")
xt.WriteElementString("to", emails(i).Recipient)
xt.WriteEndElement()
xt.WriteElementString("subject", emails(i).Subject)
xt.WriteElementString("body", emails(i).Body)
xt.WriteEndElement()
Next
xt.WriteEndElement()
End Using
Return sb.ToString
End Function
EDIT:
This need error handling etc, but should work for you. There are some cases where it will break (such as if a file exists but is empty) which you will need to solve yourself.
Module consoleTestApp
Private _path As String = "c:\output.xml"
//Just pretend these are text boxes
Public txtFrom As String
Public txtRecipient As String
Public txtSubject As String
Public txtBody As String
Sub Main()
txtFrom = "from1"
txtRecipient = "rec1"
txtSubject = "subj1"
txtBody = "body1"
AddNewEmail()
txtFrom = "from2"
txtRecipient = "rec2"
txtSubject = "subj2"
txtBody = "body2"
AddNewEmail()
End Sub
Private Sub AddNewEmail()
If Not IO.File.Exists(_path) Then
Using xt As New Xml.XmlTextWriter(_path, System.Text.Encoding.UTF8)
xt.WriteStartElement("xmlDoc")
xt.WriteEndElement()
End Using
End If
Dim xD As New Xml.XmlDocument
xD.Load(_path)
Dim xN As Xml.XmlNode = xD.CreateNode(Xml.XmlNodeType.Element, String.Empty, "email", String.Empty)
xN.InnerXml = GenerateXML()
xD.SelectSingleNode("//xmlDoc").AppendChild(xN)
xD.Save(_path)
End Sub
Private Function GenerateXML() As String
Dim sb As New System.Text.StringBuilder
Using sw As New IO.StringWriter(sb), xt As New Xml.XmlTextWriter(sw)
xt.WriteStartElement("From")
xt.WriteElementString("address", txtFrom)
xt.WriteEndElement()
xt.WriteStartElement("Receipent")
xt.WriteElementString("to", txtRecipient)
xt.WriteEndElement()
xt.WriteElementString("subject", txtSubject)
xt.WriteElementString("body", txtBody)
End Using
Return sb.ToString
End Function
End Module

Related

Unable to cast object of type 'System.Object' to type (MyClass) Vb.Net

I am using this code to store the object of my class "Device" to Object but I am getting the "system.invalidcastexception" Exception. I cast it in the same way in other classes and there it worked but here it is not working
Public Class Device
Inherits MainDevice
Private TestData As New SortedList(Of Integer, DataVPAA)
Public Sub New(ByVal version As String, ByVal System As String, ByVal IdNumber As UInteger, ByVal Serial As String)
DataVersion = version
SystemVersion = System
Serial_Number = Serial
IdentNumber = IdNumber
This is where i am getting the Error
Dim obj As Object
obj = LoadXml(GetType(Device), Path)
If obj Is Nothing Then
' Some Logic Here
Else
Dim dev As New Device
dev = CType(obj, Device) '**system.invalidcastexception**
Me.TestData = dev.TestData
' Some Logic Here
End If
End Sub
End Class
Load Function
Function LoadXML(ByVal DeviceType As Type, ByVal Path As String) As Object
Dim obj As New Object
Dim XMLFilePath As String
Dim xmlreader As XmlReader
If Me.GetType = GetType(ABCDevice) Or Me.GetType = GetType(CVDevice) Or Me.GetType = GetType(CV2Device) Then
XMLFilePath = Path + "\" + strIdentNr + "_" + Serial_Number + ".xml"
Else
XMLFilePath = Path + "\" + IdentNumber.ToString + "_" + Serial_Number + ".xml"
End If
'Check if File exists
If File.Exists(XMLFilePath) Then
Dim fs As New FileStream(XMLFilePath, FileMode.Open, FileAccess.Read)
xmlreader = XmlReader.Create(fs)
Try 'Try to deserialize to object
Dim xml_deserializer As New Serialization.XmlSerializer(DeviceType)
If xml_deserializer.CanDeserialize(xmlreader) Then
obj = xml_deserializer.Deserialize(xmlreader)
End If
Catch ex As Exception
MessageBox.Show("XML Deserializer Error: " + ex.Message)
End Try
fs.Close()
Return obj
Else : Return Nothing
End If
End Function
I tried to cast it with different methods like directcast and others but i am getting the same exception.

You can make the LoadXml generic and always return the type you want. Such as
Function LoadXml(Of T)(path As String) As T
Dim obj As T = Nothing
Dim XMLFilePath As String
If Me.GetType = GetType(ABCDevice) Or Me.GetType = GetType(CVDevice) Or Me.GetType = GetType(CV2Device) Then
XMLFilePath = path + "\" + strIdentNr + "_" + Serial_Number + ".xml"
Else
XMLFilePath = path + "\" + IdentNumber.ToString + "_" + Serial_Number + ".xml"
End If
'Check if File exists
If File.Exists(XMLFilePath) Then
Using fs As New FileStream(XMLFilePath, FileMode.Open, FileAccess.Read)
Using reader = XmlReader.Create(fs)
Try 'Try to deserialize to object
Dim xml_deserializer As New Serialization.XmlSerializer(GetType(T))
If xml_deserializer.CanDeserialize(reader) Then
obj = xml_deserializer.Deserialize(reader)
End If
Catch ex As Exception
MessageBox.Show("XML Deserializer Error: " + ex.Message)
End Try
End Using
End Using
End If
Return obj
End Function
Dim dev = LoadXml(Of Device)("path")
Now dev is guaranteed to be a Device. If it's Nothing, it failed

How would I write formatted data to a file and then read it? VB.NET (2012 edition)

I'm practicing VB.NET and I've got a problem with Reading and writing to a .dat file. I have made a structure to store data temporarily (below).
Structure CustomerType
Dim AccountNum As String
Dim Surname As String
Dim Forename As String
Dim Balance As Decimal
End Structure
I then Dim everything.
Dim Customers(9) As CustomerType
Dim Filename As String = "Accounts.dat"
Dim NumberOfRecords As Short = 0
Dim myFormat As String = "{0,-15}|{1,-15}|{2,-10}|{3,-10}"
I have a button that creates a new account and this is where I get the problem.
FileOpen(1, Filename, OpenMode.Random, , , )
For i = 1 To Customers.Length() - 1
With Customers(i)
.Forename = InputBox("First name", "Forename")
Do Until .Forename <> "" And TypeOf .Forename Is String
.Forename = InputBox("First name", "Forename")
Loop
.Surname = InputBox("Surname", "Surname")
Do Until .Surname <> "" And TypeOf .Surname Is String
.Surname = InputBox("Surname", "Surname")
Loop
.AccountNum = InputBox("Account Number of " & Customers(i).Forename & " " & Customers(i).Surname & ".", "Account Number")
Do Until .AccountNum.Length = 8 And TypeOf .AccountNum Is String
.AccountNum = InputBox("Account Number of " & Customers(i).Forename & " " & Customers(i).Surname & ".", "Account Number")
Loop
.Balance = InputBox("Balance of " & Customers(i).Forename & " " & Customers(i).Surname & ".", "Balance")
Do Until .Balance > -1
.Balance = InputBox("Balance of " & Customers(i).Forename & " " & Customers(i).Surname & ".", "Balance")
Loop
FilePut(1, Customers, NumberOfRecords + 1)
NumberOfRecords += 1
lblNumberOfRecords.Text = NumberOfRecords
End With
Next
FileClose(1)
I have another button that displays the data in a listbox. I can only get one item to display before I get a bad length error.
Dim Index As Integer
ListBox1.Items.Clear()
ListBox1.Items.Add(String.Format(myFormat, "Forename", "Surname", "Acc. Num.", "Balance"))
ListBox1.Items.Add("_____________________________________________________")
FileOpen(1, Filename, OpenMode.Random, , , )
For Index = 1 To NumberOfRecords
FileGet(1, Customers)
ListBox1.Items.Add(String.Format(myFormat, Customers(Index).Forename, Customers(Index).Surname, Customers(Index).AccountNum, Format(Customers(Index).Balance, "currency")))
Next Index
FileClose(1)
The main question that I have is What am I doing wrong, and how can I fix it?
Many Thanks in advance,
Jordan

First you'll need to import these namespaces:
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.IO
Model
Change your customertype model to this:
<Serializable()> _
Public Class CustomerType
Implements ISerializable
Public Sub New()
End Sub
Protected Sub New(info As SerializationInfo, context As StreamingContext)
Me.AccountNum = info.GetString("AccountNum")
Me.Surname = info.GetString("Surname")
Me.Forename = info.GetString("Forename")
Me.Balance = info.GetDecimal("Balance")
End Sub
Public AccountNum As String
Public Surname As String
Public Forename As String
Public Balance As Decimal
Public Sub GetObjectData(info As System.Runtime.Serialization.SerializationInfo, context As System.Runtime.Serialization.StreamingContext) Implements System.Runtime.Serialization.ISerializable.GetObjectData
info.AddValue("AccountNum", Me.AccountNum)
info.AddValue("Surname", Me.Surname)
info.AddValue("Forename", Me.Forename)
info.AddValue("Balance", Me.Balance)
End Sub
End Class
Your model do now support serialization. Next step is to create functions to read/write a model collection to/from a file.
Write
Friend Shared Sub Write(filePathAndName As String, list As List(Of CustomerType))
Dim formatter As IFormatter = New BinaryFormatter()
Using stream As New FileStream(filePathAndName, FileMode.Create, FileAccess.Write, FileShare.None)
formatter.Serialize(stream, list)
End Using
End Sub
Read
Friend Shared Function Read(filePathAndName As String) As List(Of CustomerType)
Dim formatter As IFormatter = New BinaryFormatter()
Dim list As List(Of CustomerType) = Nothing
Using stream As New FileStream(filePathAndName, FileMode.Open, FileAccess.Read, FileShare.None)
list = DirectCast(formatter.Deserialize(stream), List(Of CustomerType))
End Using
Return list
End Function
Usage
Drop a button named Button1 onto a form named Form1 and add this code:
Public Class Form1
Public Sub New()
Me.InitializeComponent()
End Sub
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim path As String = "C:\test.dat" '<- Change to desired path
Dim list As New List(Of CustomerType)
'Create test item1 and add to list.
Dim item1 As New CustomerType()
With item1
.AccountNum = "1"
.Balance = 1000D
.Forename = "Forename 1"
.Surname = "Surname 1"
End With
list.Add(item1)
'Create test item2 and add to list.
Dim item2 As New CustomerType()
With item2
.AccountNum = "2"
.Balance = 2000D
.Forename = "Forename 2"
.Surname = "Surname 2"
End With
list.Add(item2)
'Write to file:
Write(path, list)
'Read from file into new list:
Dim list2 As List(Of CustomerType) = Read(path)
MsgBox(String.Format("Count={0}", list2.Count))
End Sub
Friend Shared Sub Write(filePathAndName As String, list As List(Of CustomerType))
Dim formatter As IFormatter = New BinaryFormatter()
Using stream As New FileStream(filePathAndName, FileMode.Create, FileAccess.Write, FileShare.None)
formatter.Serialize(stream, list)
End Using
End Sub
Friend Shared Function Read(filePathAndName As String) As List(Of CustomerType)
Dim formatter As IFormatter = New BinaryFormatter()
Dim list As List(Of CustomerType) = Nothing
Using stream As New FileStream(filePathAndName, FileMode.Open, FileAccess.Read, FileShare.None)
list = DirectCast(formatter.Deserialize(stream), List(Of CustomerType))
End Using
Return list
End Function
End Class

how to export the data from a queried database to excel in SQL

I have a page where a database is filtered by many factors: Name, Id, Status, etc. I want to be able to press a button that says "Open this query in excel" and it will download the results into excel. How is this possible? I have seen something like this:
"SELECT * INTO OUTFILE 'query.csv' FROM RMS WHERE 1 = '1'";
But this is not working for me. I already have the database querying right, I just need the functionality to export that query to excel by pressing a button that will download the complete query into an excel file. If someone could help I will really appreciate it!
This is how the page looks

That's not how it works.
If you do it that way, the file gets saved on the sql server.
You need to do
select * from your_table
into a datatable. Then you use the FileHelpers Library to create a csv file:
FileHelpers.CsvEngine.DataTableToCsv(dataTable, filename);
Then you write this csv-file to HttpContext.Response and set the attach header.
Public Class TextHandler
Implements System.Web.IHttpHandler
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
'context.Response.ContentType = "text/plain"
'context.Response.Write("Hello World!")
Dim memoryStream As New System.IO.MemoryStream()
Dim textWriter As System.IO.TextWriter = New System.IO.StreamWriter(memoryStream)
textWriter.WriteLine("YOUR CSV CONTENT")
textWriter.Flush()
memoryStream.Position = 0
Dim bytesInStream As Byte() = New Byte(memoryStream.Length - 1) {}
'memoryStream.Write(bytesInStream, 0, bytesInStream.Length)
memoryStream.Read(bytesInStream, 0, CInt(memoryStream.Length))
memoryStream.Close()
context.Response.Clear()
context.Response.ContentType = "application/octet-stream"
context.Response.AddHeader("Content-Disposition", GetContentDisposition(strFileName))
context.Response.BinaryWrite(bytesInStream)
context.Response.End()
End Sub
ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
Get
Return False
End Get
End Property
End Class
Public Shared Function StripInvalidPathChars(str As String) As String
If str Is Nothing Then
Return Nothing
End If
Dim strReturnValue As String = ""
Dim strInvalidPathChars As New String(System.IO.Path.GetInvalidPathChars())
Dim bIsValid As Boolean = True
For Each cThisChar As Char In str
bIsValid = True
For Each cInvalid As Char In strInvalidPathChars
If cThisChar = cInvalid Then
bIsValid = False
Exit For
End If
Next cInvalid
If bIsValid Then
strReturnValue += cThisChar
End If
Next cThisChar
Return strReturnValue
End Function ' StripInvalidPathChars
Public Shared Function GetContentDisposition(ByVal strFileName As String) As String
' http://stackoverflow.com/questions/93551/how-to-encode-the-filename-parameter-of-content-disposition-header-in-http
Dim contentDisposition As String
strFileName = StripInvalidPathChars(strFileName)
If System.Web.HttpContext.Current IsNot Nothing AndAlso System.Web.HttpContext.Current.Request.Browser IsNot Nothing Then
If (System.Web.HttpContext.Current.Request.Browser.Browser = "IE" And (System.Web.HttpContext.Current.Request.Browser.Version = "7.0" Or System.Web.HttpContext.Current.Request.Browser.Version = "8.0")) Then
contentDisposition = "attachment; filename=" + Uri.EscapeDataString(strFileName).Replace("'", Uri.HexEscape("'"c))
ElseIf (System.Web.HttpContext.Current.Request.Browser.Browser = "Safari") Then
contentDisposition = "attachment; filename=" + strFileName
Else
contentDisposition = "attachment; filename*=UTF-8''" + Uri.EscapeDataString(strFileName)
End If
Else
contentDisposition = "attachment; filename*=UTF-8''" + Uri.EscapeDataString(strFileName)
End If
Return contentDisposition
End Function ' GetContentDisposition
Since CSV is plain text, you could probably just set the ContentType, Attach + write the text to the Response directly, without using MemoryStream.

Adding text to a list view from threads

I am new to VB and I am trying to add text from a thread to a listview in my Form1.
I have tried implementing the invokerequired method but still the new text is not added to my listview.
(please see function addlvDataItem)
This what I call in my thread class:
Private Sub DoServerListening()
'Thread to listen for new incoming socket clients
Dim mSocket As System.Net.Sockets.Socket
Dim newConnectionThread As clsTCPConnection
Dim strRemoteIPAddress As String
Do
Try
While bServerRunning = True
If mTCPListener.Pending = True Then
mSocket = mTCPListener.AcceptSocket()
'mSocket.Blocking = True
If mSocket.Connected Then
strRemoteIPAddress = Split(mSocket.RemoteEndPoint.ToString, ":")(0)
newConnectionThread = New clsTCPConnection(mSocket, strRemoteIPAddress)
'Start the thread to handle this connection
Form1.addlvDataItem("Connected to " & strRemoteIPAddress.ToString(), 0)
Dim myThread As New System.Threading.Thread(AddressOf newConnectionThread.HandleConnection)
myThread.Start()
End If
End If
End While
Catch ex As Exception
If bServerRunning = True Then
'notify main application
End If
End Try
Loop
End Sub
and this is what i do in my Form1 class
Public Delegate Sub addlvDataItemCallback(ByVal [text] As String, ByVal Num As Integer)
Public Sub addlvDataItem(ByVal [text] As String, ByVal Type As Integer)
CurrentDateTime = DateTime.Now
If lvData.InvokeRequired Then
Dim d As New addlvDataItemCallback(AddressOf addlvDataItem)
Me.Invoke(d, New Object() {[text]})
Else
If Type = 1 Then 'TX
Me.lvData.Items.Add("TX (" + text.Length.ToString() + " bytes): " + CurrentDateTime + " : <Start> " + text.ToString() + "<End>")
ElseIf Type = 2 Then
Me.lvData.Items.Add("RX (" + text.Length.ToString() + " bytes): " + CurrentDateTime + " : <Start> " + text.ToString() + "<End>")
Else
Me.lvData.Items.Add("Info: " + CurrentDateTime + " : " + text.ToString())
End If
End If
End Sub
The new text that I add is not displayed in the listview. I do not get any compile or runtime errors but still no new text to list box. I can add text from my Form1 class but not from the thread.

You provided code does throw an TargetParameterCountException.
You have to pass all parameters to your delegate sub:
Me.Invoke(d, New Object() {[text], Type})
instead of
Me.Invoke(d, New Object() {[text]})

How to get GLatLng object from address string in advance in google maps?

I want to get latlng object in google maps in advance. Basically my json result is returning array of address which I need to convert to glatlng to use for markers. But if i will use GeoCoder object then it will send asynch request which I don't want.
Is there any way other than GeoCoder object to convert an address string to GLatLng object?

You can take a look at the json object returned by any query to the maps api.
Then you use the json serializer in system.web.extensions to serialize the json into a class that you have to create from the JSONresponses which you analyze manually.
Note that you can get localized language return results by adding this to the http web request:
wrHTTPrequest.UserAgent = "Lord Vishnu/Transcendental (Vaikuntha;Supreme Personality of Godness)"
wrHTTPrequest.Headers.Add("Accept-Language:" + System.Globalization.CultureInfo.CurrentCulture.Name)
wrHTTPrequest.ContentType = "text/html"
Edit:
The example, from one of my files (remove all the SharpMap.Map stuff, it requires an external assembly.
Copyright (C) 2010 Me. Permission is hereby granted to use it for
good, not evil - if you add me to your thanks list.
Public Class _Default
Inherits System.Web.UI.Page
Protected smmGlobalMap As SharpMap.Map
'http://www.java2s.com/Code/VB/Development/ListallCultureInformation.htm
Public Sub listcultures()
'Dim x As System.DateTime = DateTime.Now
'Response.Write(x.ToString("HH':'mm':'ss MMM d', 'yyyy 'PST'", New System.Globalization.CultureInfo("zh-CN", False)))
Dim info As System.Globalization.CultureInfo
For Each info In System.Globalization.CultureInfo.GetCultures(System.Globalization.CultureTypes.AllCultures)
Response.Write("Deutsch: " + info.DisplayName + " English: " + info.EnglishName + " Native: " + info.NativeName + " Name: " + info.Name + " Codepage: " + info.TextInfo.ANSICodePage.ToString() + "<br />")
If Not info.IsNeutralCulture Then
'item.SubItems.Add(amount.ToString("C", info.NumberFormat))
'item.SubItems.Add(dateNow.ToString("d", info.DateTimeFormat))
End If
Next
End Sub
Public Sub GeoCodeTest()
'Dim GeoCodeResponse As Google.Maps.JSON.cGeoCodeResponse = GetJSONgeodata("San Bernardino, Switzerland")
'Dim GeoCodeResponse As Google.Maps.JSON.cGeoCodeResponse = GetJSONgeodata("北京")
'Dim GeoCodeResponse As Google.Maps.JSON.cGeoCodeResponse = GeoCodeRequest("San Bernardino, Switzerland")
Dim GeoCodeResponse As Google.Maps.JSON.cGeoCodeResponse = GeoCodeRequest("北京")
Response.Write(Seri(GeoCodeResponse))
Response.Write("<br /><br /><br />")
Response.Write(GeoCodeResponse.results(0).address_components(0).long_name)
Response.Write("<br /><br />")
Response.Write(GeoCodeResponse.results(0).geometry.location.lat.ToString)
Response.Write("<br />")
Response.Write(GeoCodeResponse.results(0).geometry.location.lng.ToString)
Response.Write("<br /><br /><br />")
Response.Write(GeoCodeResponse.results(0).geometry.viewport.northeast.lat.ToString)
Response.Write("<br />")
Response.Write(GeoCodeResponse.results(0).geometry.viewport.northeast.lng.ToString)
Response.Write("<br /><br /><br />")
End Sub
Public Function Seri(ByRef GeoData As Google.Maps.JSON.cGeoCodeResponse) As String
Dim jssJSONserializer As System.Web.Script.Serialization.JavaScriptSerializer = New System.Web.Script.Serialization.JavaScriptSerializer()
Dim CommentData As New Google.Maps.JSON.cGeoCodeResponse
Dim str As String = jssJSONserializer.Serialize(GeoData)
Return str
End Function
' http://www.codeproject.com/KB/IP/httpwebrequest_response.aspx
' http://www.linuxhowtos.org/C_C++/socket.htm
' http://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP)_per_capita
Public Function GeoCodeRequest(ByRef strAddress As String) As Google.Maps.JSON.cGeoCodeResponse
strAddress = System.Web.HttpUtility.UrlEncode(strAddress) ' Add reference to System.Web
Dim strURL As String = "http://maps.google.com/maps/api/geocode/json?address=" + strAddress + "&sensor=false"
' *** Establish the request
Dim wrHTTPrequest As System.Net.HttpWebRequest = DirectCast(System.Net.WebRequest.Create(strURL), System.Net.HttpWebRequest)
' *** Set properties
wrHTTPrequest.Method = "GET"
wrHTTPrequest.Timeout = 10000 ' 10 secs
wrHTTPrequest.UserAgent = "Lord Vishnu/Transcendental (Vaikuntha;Supreme Personality of Godness)"
wrHTTPrequest.Headers.Add("Accept-Language:" + System.Globalization.CultureInfo.CurrentCulture.Name)
wrHTTPrequest.ContentType = "text/html"
' *** Retrieve request info headers
Dim wrHTTPresponse As System.Net.HttpWebResponse = DirectCast(wrHTTPrequest.GetResponse(), System.Net.HttpWebResponse)
' My Windows' default code-Page
Dim enc As System.Text.Encoding = System.Text.Encoding.GetEncoding(1252)
' Google's code-page
enc = System.Text.Encoding.UTF8
Dim srResponseStream As New System.IO.StreamReader(wrHTTPresponse.GetResponseStream(), enc)
Dim strJSONencodedResponse As String = srResponseStream.ReadToEnd()
wrHTTPresponse.Close()
srResponseStream.Close()
If String.IsNullOrEmpty(strJSONencodedResponse) Then
Return Nothing
End If
Dim jssJSONserializer As System.Web.Script.Serialization.JavaScriptSerializer = New System.Web.Script.Serialization.JavaScriptSerializer()
Dim GeoCodeResponse As New Google.Maps.JSON.cGeoCodeResponse
GeoCodeResponse = jssJSONserializer.Deserialize(Of Google.Maps.JSON.cGeoCodeResponse)(strJSONencodedResponse)
Return GeoCodeResponse
End Function
Public Function GetJSONgeodata(ByVal strAddress As String) As Google.Maps.JSON.cGeoCodeResponse
'strAddress = "Zurich, Switzerland"
strAddress = System.Web.HttpUtility.UrlEncode(strAddress) ' Add reference to System.Web
Dim strURL As String = "http://maps.google.com/maps/api/geocode/json?address=" + strAddress + "&sensor=false"
Dim wwwClient As Net.WebClient = Nothing
Dim strJSONtranslatedText As String = Nothing
Try
'http://www.stevetrefethen.com/blog/UsingGoogleMapsforGeocodinginC.aspx
wwwClient = New Net.WebClient()
wwwClient.Encoding = System.Text.Encoding.UTF8
strJSONtranslatedText = wwwClient.DownloadString(strURL)
Catch ex As Exception
MsgBox(ex.Message)
Finally
wwwClient.Dispose()
wwwClient = Nothing
End Try
If String.IsNullOrEmpty(strJSONtranslatedText) Then
Return Nothing
End If
Dim jssJSONserializer As System.Web.Script.Serialization.JavaScriptSerializer = New System.Web.Script.Serialization.JavaScriptSerializer()
Dim GeoCodeRespone As New Google.Maps.JSON.cGeoCodeResponse
GeoCodeRespone = jssJSONserializer.Deserialize(Of Google.Maps.JSON.cGeoCodeResponse)(strJSONtranslatedText)
Return GeoCodeRespone
End Function
' http://sharpmap.codeplex.com/wikipage?title=CustomTheme
' http://sharpmap.codeplex.com/Thread/View.aspx?ThreadId=28205
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'GeoCodeTest()
listcultures()
'Set up the map
smmGlobalMap = InitializeMap(New System.Drawing.Size(CInt(imgMap.Width.Value), CInt(imgMap.Height.Value)))
If Page.IsPostBack Then
'Page is post back. Restore center and zoom-values from viewstate
smmGlobalMap.Center = DirectCast(ViewState("mapCenter"), SharpMap.Geometries.Point)
smmGlobalMap.Zoom = CDbl(ViewState("mapZoom"))
Else
'This is the initial view of the map. Zoom to the extents of the map:
smmGlobalMap.ZoomToExtents()
'Save the current mapcenter and zoom in the viewstate
ViewState.Add("mapCenter", smmGlobalMap.Center)
ViewState.Add("mapZoom", smmGlobalMap.Zoom)
'Create the map
CreateMap()
End If
DistanceAltstRebstein()
End Sub
Protected Sub imgMap_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs)
'Set center of the map to where the client clicked
smmGlobalMap.Center = SharpMap.Utilities.Transform.MapToWorld(New System.Drawing.Point(e.X, e.Y), smmGlobalMap)
'Set zoom value if any of the zoom tools were selected
If rblMapTools.SelectedValue = "0" Then
'Zoom in
smmGlobalMap.Zoom = smmGlobalMap.Zoom * 0.5
ElseIf rblMapTools.SelectedValue = "1" Then
'Zoom out
smmGlobalMap.Zoom = smmGlobalMap.Zoom * 2
End If
'Save the new map's zoom and center in the viewstate
ViewState.Add("mapCenter", smmGlobalMap.Center)
ViewState.Add("mapZoom", smmGlobalMap.Zoom)
'Create the map
CreateMap()
Response.Write("X: " + e.X.ToString + " Y: " + e.Y.ToString + "<br /><br />")
Response.Write("Longitude: " + smmGlobalMap.Center.X.ToString + " Latitude: " + smmGlobalMap.Center.Y.ToString + "<br />")
End Sub
' http://sharpmapv2.googlecode.com/svn/trunk/SharpMap/Rendering/Thematics/CustomTheme.cs
Public Function SetStyle1(ByVal row As SharpMap.Data.FeatureDataRow) As SharpMap.Styles.VectorStyle
Dim vstlStyle1 As SharpMap.Styles.VectorStyle = New SharpMap.Styles.VectorStyle()
vstlStyle1.Enabled = True
vstlStyle1.EnableOutline = True
vstlStyle1.Fill = System.Drawing.Brushes.Yellow
Return vstlStyle1
End Function
'density, countryname
Private Sub InsertData(ByVal strParameter1 As String, ByVal strParameter2 As String)
Dim dbcon As New System.Data.SqlClient.SqlConnection("Data Source=pc-myname\MS_SQL_2005;Initial Catalog=ddb;Integrated Security=SSPI;")
dbcon.Open()
Dim strSQL As String = "IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'dbo.T_SHP_Country') AND type in (N'U'))"
strSQL += "CREATE TABLE T_SHP_Country( "
strSQL += "SHPC_UID uniqueidentifier NULL, "
strSQL += "SHPC_Density int NULL, "
strSQL += "SHPC_CountryName nvarchar(max) NULL "
strSQL += ") ON [PRIMARY] ;"
Dim dbcmdCheckRequirements As New System.Data.SqlClient.SqlCommand(strSQL, dbcon)
dbcmdCheckRequirements.ExecuteNonQuery()
'dbcmdCheckRequirements.CommandText = "DELETE FROM T_SHP_Country"
'dbcmdCheckRequirements.ExecuteNonQuery()
strParameter1 = strParameter1.Replace("'", "''")
strParameter2 = strParameter2.Replace("'", "''")
'strParameter3 = strParameter3.Replace("'", "''")
strSQL = "INSERT INTO T_SHP_Country "
strSQL += "(SHPC_UID, SHPC_Density, SHPC_CountryName)"
strSQL += "VALUES("
strSQL += "'" + System.Guid.NewGuid.ToString() + "', " 'PLZ_UID, uniqueidentifier
strSQL += " '" + strParameter1 + "', " 'PLZ_Name1, nvarchar(max)
strSQL += " '" + strParameter2 + "' " 'PLZ_State, nvarchar(max)
strSQL += ")"
Dim cmd As New System.Data.SqlClient.SqlCommand(strSQL, dbcon)
cmd.ExecuteNonQuery()
dbcon.Close()
End Sub
Public Function SetStyle(ByVal row As SharpMap.Data.FeatureDataRow) As SharpMap.Styles.VectorStyle
Response.Write("")
If False Then
For i As Integer = 0 To row.Table.Columns.Count - 1 Step 1
Response.Write("<br>" + row.Table.Columns(i).ColumnName + "<br>")
Response.Write("<br>" + row("NAME").ToString + ": " + row("POPDENS").ToString + "<br>")
Next i
End If
Try
'InsertData(row("POPDENS").ToString(), row("NAME").ToString())
Dim vstlStyle As SharpMap.Styles.VectorStyle = New SharpMap.Styles.VectorStyle()
Select Case row("POPDENS")
Case 0 To 5
' Add reference to System.Drawing
Dim colCustomColor As System.Drawing.Color = System.Drawing.Color.FromArgb(50, System.Drawing.Color.Gray)
'Dim customColor As System.Drawing.Color = System.Drawing.Color.FromArgb(255, 0, 110, 255)
Dim sbShadowBrush As System.Drawing.SolidBrush = New System.Drawing.SolidBrush(colCustomColor)
vstlStyle.Fill = sbShadowBrush
Case 6 To 9
vstlStyle.Fill = System.Drawing.Brushes.BlanchedAlmond
Case 10 To 25
vstlStyle.Fill = System.Drawing.Brushes.DarkGreen
Case 26 To 50
vstlStyle.Fill = System.Drawing.Brushes.Green
Case 51 To 100
vstlStyle.Fill = System.Drawing.Brushes.YellowGreen
Case 101 To 200
vstlStyle.Fill = System.Drawing.Brushes.Orange
Case 201 To 250
vstlStyle.Fill = System.Drawing.Brushes.DarkOrange
Case 251 To 300
vstlStyle.Fill = System.Drawing.Brushes.OrangeRed
Case 401 To 600
vstlStyle.Fill = System.Drawing.Brushes.Red
Case 601 To 900
vstlStyle.Fill = System.Drawing.Brushes.DarkRed
Case 901 To 1000
vstlStyle.Fill = System.Drawing.Brushes.Crimson
Case Else
vstlStyle.Fill = System.Drawing.Brushes.Pink
End Select
vstlStyle.EnableOutline = True
Dim clCustomPenColor As System.Drawing.Color = System.Drawing.Color.FromArgb(100, 100, 100, 100)
Dim myPen As New System.Drawing.Pen(clCustomPenColor)
myPen.Width = 0.1
'vstlStyle.Outline = System.Drawing.Pens.Black
vstlStyle.Outline = myPen
Return vstlStyle
'If (row("NAME").ToString().StartsWith("S")) Then
' Dim vstlStyle As SharpMap.Styles.VectorStyle = New SharpMap.Styles.VectorStyle()
' vstlStyle.Fill = System.Drawing.Brushes.Yellow
' Return vstlStyle
'Else
' Return Nothing ' Return null which will render the default style
'End If
Catch ex As Exception
Response.Write(ex.Message)
Return Nothing
End Try
End Function
Sub SetThemeForLayerOnMap(ByRef cstCustomTheme As SharpMap.Rendering.Thematics.CustomTheme, ByVal strLayerName As String, ByRef smmMapParameter As SharpMap.Map)
TryCast(smmMapParameter.GetLayerByName(strLayerName), SharpMap.Layers.VectorLayer).Theme = cstCustomTheme
'CType(smmMapParameter.GetLayerByName(strLayerName), SharpMap.Layers.VectorLayer).Theme = cstCustomTheme
End Sub
Sub ReIndex(ByVal strRelativePath As String)
Dim shfShapeFile As New SharpMap.Data.Providers.ShapeFile(Server.MapPath(strRelativePath), True)
ReIndex(shfShapeFile)
End Sub
Sub ReIndex(ByRef shfShapeFile As SharpMap.Data.Providers.ShapeFile)
If shfShapeFile.IsOpen Then
shfShapeFile.RebuildSpatialIndex()
Else
shfShapeFile.Open()
shfShapeFile.RebuildSpatialIndex()
shfShapeFile.Close()
End If
End Sub
Public Function OldDegreesToRadian(ByVal dblDegrees As Double) As Double
Dim dblRadians = dblDegrees * Math.PI / 180.0
Return dblRadians
End Function
Public Sub DistanceAltstRebstein()
'http://www.getlatlon.com/
Dim allat As Double = 47.377894
Dim allong As Double = 9.539833
Dim reblat As Double = 47.399364
Dim reblong As Double = 9.585995
Dim distance As Double = GetDistance(allat, reblat, allong, reblong)
Response.Write("Distance: " + distance.ToString("#,#.000") + " km")
End Sub
'http://www.codeproject.com/KB/cs/distancebetweenlocations.aspx
'http://www.billsternberger.net/asp-net-mvc/latitude-and-longitude-lookup-with-jquery-c-asp-net-mvc/
'http://webcache.googleusercontent.com/search?q=cache:y6AGC8J7zG8J:bryan.reynoldslive.com/post/Latitude2c-Longitude2c-Bearing2c-Cardinal-Direction2c-Distance2c-and-C.aspx+c%23+get+latitude+longitude&cd=2&hl=en&ct=clnk
Public Function GetDistance(ByVal dblLat1 As Double, ByVal dblLat2 As Double, ByVal dblLong1 As Double, ByVal dblLong2 As Double) As Double
' http://itouchmap.com/latlong.html
' http://mathforum.org/library/drmath/sets/select/dm_lat_long.html
' http://stevemorse.org/jcal/latlon.php
' http://en.wikipedia.org/wiki/Atan2
' http://www.movable-type.co.uk/scripts/latlong.html
' Formula:
' R = Earth's radius (mean radius = 6,371km)
' Δlat = lat2− lat1
' Δlong = long2− long1
' a = sin²(Δlat/2) + cos(lat1)*cos(lat2)*sin²(Δlong/2)
' c = 2*atan2(√a, √(1−a))
' d = R*c
dblLat1 = OldDegreesToRadian(dblLat1)
dblLat2 = OldDegreesToRadian(dblLat2)
dblLong1 = OldDegreesToRadian(dblLong1)
dblLong2 = OldDegreesToRadian(dblLong2)
'http://en.wikipedia.org/wiki/Earth_radius#Mean_radii
Dim dblEarthMeanRadius As Double = 6371.009 ' km
Dim dblHalfDeltaLat As Double = (dblLat2 - dblLat1) / 2.0
Dim dblHalfDeltaLong As Double = (dblLong2 - dblLong1) / 2.0
Dim dblTriangleSideA As Double = Math.Sin(dblHalfDeltaLat) * Math.Sin(dblHalfDeltaLat) + _
Math.Cos(dblLat1) * Math.Cos(dblLat2) * _
Math.Sin(dblHalfDeltaLong) * Math.Sin(dblHalfDeltaLong)
Dim dblTriangleSideC As Double = 2 * Math.Atan2(Math.Sqrt(dblTriangleSideA), Math.Sqrt(1 - dblTriangleSideA))
Dim dblDistance As Double = dblEarthMeanRadius * dblTriangleSideC ' in km
Return dblDistance ' in km
' Note for the English: 1 (statute) mile = 1609.344 m = 1.609344 km
' http://en.wikipedia.org/wiki/Mile#Nautical_mile
dblDistance = dblDistance / 1.609344 ' km to statute miles
Return dblDistance ' in statute miles
End Function
''' <summary>
''' Sets up the map, add layers and sets styles
''' </summary>
''' <param name="outputsize">Initiatial size of output image</param>
''' <returns>Map object</returns>
Private Function InitializeMap(ByVal outputsize As System.Drawing.Size) As SharpMap.Map
'Initialize a new map of size 'imagesize'
Dim map As New SharpMap.Map(outputsize)
map.BackColor = Drawing.Color.AliceBlue
'Set up the countries layer
Dim layCountries As New SharpMap.Layers.VectorLayer("Countries")
'Set the datasource to a shapefile in the App_data folder
Dim sfShapeFile1 As New SharpMap.Data.Providers.ShapeFile(Server.MapPath("~\App_data\Countries.shp"), True)
ReIndex(sfShapeFile1)
'Dim x As System.Data.DataColumnCollection = sfShapeFile1.Columns
'For Each y As DataColumn In x
' Response.Write(y.ColumnName)
' Response.Write(y.DataType.ToString())
'
' Next
'x.Item(0).ColumnName
'x.Item(0).DataType.ToString()
layCountries.DataSource = sfShapeFile1
'Set fill-style to green
Dim MyTheme As New SharpMap.Rendering.Thematics.CustomTheme(AddressOf SetStyle)
Dim defaultstyle As SharpMap.Styles.VectorStyle = New SharpMap.Styles.VectorStyle()
defaultstyle.Fill = System.Drawing.Brushes.Gray
MyTheme.DefaultStyle = defaultstyle
layCountries.Theme = MyTheme
layCountries.Style.Fill = New System.Drawing.SolidBrush(System.Drawing.Color.Green)
'Set the polygons to have a black outline
layCountries.Style.Outline = System.Drawing.Pens.Black
layCountries.Style.EnableOutline = True
'Set up a river layer
Dim layRivers As New SharpMap.Layers.VectorLayer("Rivers")
'Set the datasource to a shapefile in the App_data folder
Dim sh2 As New SharpMap.Data.Providers.ShapeFile(Server.MapPath("~\App_data\Rivers.shp"), True)
ReIndex(sh2)
layRivers.DataSource = sh2
'Define a blue 1px wide pen
layRivers.Style.Line = New System.Drawing.Pen(System.Drawing.Color.Blue, 1)
'Dim x As New SharpMap.Rendering.Thematics.IndividualTheme("abc")
'Add the layers to the map object.
'The order we add them in are the order they are drawn, so we add the rivers last to put them on top
map.Layers.Add(layCountries)
map.Layers.Add(layRivers)
Return map
End Function
''' <summary>
''' Creates the map, inserts it into the cache and sets the ImageButton Url
''' </summary>
Private Sub CreateMap()
If smmGlobalMap Is Nothing Then
Response.Write("<h1 style=""color: red;"">smmGlobalMap is NULL !</h1>")
Else
Dim img As System.Drawing.Image = smmGlobalMap.GetMap()
Dim imgID As String = SharpMap.Web.Caching.InsertIntoCache(1, img)
imgMap.ImageUrl = "getmap.aspx?ID=" & HttpUtility.UrlEncode(imgID)
End If
End Sub
End Class
' http://www.4guysfromrolla.com/articles/052610-1.aspx
' http://code.google.com/apis/maps/faq.html
' http://www.billsternberger.net/asp-net-mvc/latitude-and-longitude-lookup-with-jquery-c-asp-net-mvc/
' http://code.google.com/apis/maps/documentation/geocoding/
' http://code.google.com/apis/maps/documentation/geocoding/index.html
' http://code.google.com/apis/maps/faq.html#geocoder_countries
' http://maps.google.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=false
' http://maps.google.com/maps/api/geocode/json?address=Zurich,+Switzerland&sensor=false
' http://maps.google.com/maps/api/geocode/json?address=SanBernardino,+Switzerland&sensor=false&output=json
' http://maps.google.com/maps/api/geocode/json?address=afsdfKarrrachiii&sensor=false&output=json
' http://math.rice.edu/~pcmi/sphere/sphere.html
' http://math.rice.edu/~pcmi/sphere/
Namespace Google.Maps.JSON
Public Class cAddressComponent
Public long_name
Public short_name
Public types As New List(Of String) '"locality", "country", "postal_code", "sublocality", administrative_area_level_1", administrative_area_level_2", "political"
End Class
Public Class cLocation
Public lat As Double = 0
Public lng As Double = 0
End Class
Public Class cViewPort
Public southwest As New cLocation
Public northeast As New cLocation
End Class
Public Class cBounds
Public southwest As New cLocation
Public northeast As New cLocation
End Class
Public Class cGeometry
Public location As New cLocation
Public location_type As String = "APPROXIMATE" ' "GEOMETRIC_CENTER",
Public viewport As New cViewPort
Public bounds As New cBounds
End Class
Public Class cResult
Public types As New List(Of String) ' "route", "point_of_interest", "establishment", "locality", "sublocality", "political"
Public formatted_address As String
Public address_components As New List(Of cAddressComponent)
Public geometry As New cGeometry
End Class
Public Class cGeoCodeResponse
Public status As String = "ZERO_RESULTS" ' "OK"
Public results As New List(Of cResult)
End Class
End Namespace