How to use the HttpWebRequest class and the HttpWebResponse class to delete an object by using Visual Basic .NET (314193)

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To delete an object on a computer that is running Exchange 2000 by using Visual Basic .NET, follow these steps.

Note The following sample code deletes the NewFolder folder in the Inbox. If the NewFolder folder does not exist in the Inbox, you receive the following error message:

1. Start Microsoft Visual Studio .NET.
2. On the File menu, point to New, and then click Project.
3. In the Visual Basic Projects types list, click Console Application.
   
   By default, the Module1.vb file is created.
4. In the code window, replace the code with the following:

   Imports System.Net
   Imports System.IO
   
   Module Module1
       Sub Main()
           ' TODO: Replace with the object URL that is to be deleted.
           Dim sUri As String = "http://<ExchServer>/Exchange/<UserAlias>/Inbox/NewFolder"
   
           Dim myUri As System.Uri = New System.Uri(sUri)
           Dim HttpWRequest As HttpWebRequest = WebRequest.Create(myUri)
   
           ' Set Credentials
           ' TODO: Replace with an appropriate user credential.
           Dim myCred As NetworkCredential = New NetworkCredential("Domain\UserName", "Password")
           Dim MyCredentialCache As CredentialCache = New CredentialCache()
           MyCredentialCache.Add(myUri, "Basic", myCred)
           HttpWRequest.Credentials = MyCredentialCache
   
           'Uncomment the following statement and comment the previous 4 statements if you
           'use Integrated Windows authentication
           'HttpWRequest.Credentials = CredentialCache.DefaultCredentials
   
           'Note In Basic type authentication, username and password are sent as base64-encoded text and is 
           'easily decoded. Microsoft recommends that you use Basic instead of SSL to help protect the username and password.        
   
           ' Set Headers
           HttpWRequest.KeepAlive = False
           HttpWRequest.Headers.Set("Pragma", "no-cache")
   
           'Set the request timeout to 5 minutes.
           HttpWRequest.Timeout = 300000
           ' set the request method
           HttpWRequest.Method = "DELETE"
   
           ' Send the request and get the response.
           Dim HttpWResponse As HttpWebResponse = HttpWRequest.GetResponse()
   
           ' Get the status and the headers.
           Dim iStatCode As Integer = HttpWResponse.StatusCode
           Dim sStatus As String = iStatCode.ToString()
           Console.WriteLine("Status: {0} {1}", sStatus, HttpWResponse.StatusDescription.ToString())
   
           Console.WriteLine("Request Headers:")
           Console.WriteLine(HttpWRequest.Headers.ToString())
           Console.WriteLine("Response Headers:")
           Console.WriteLine(HttpWResponse.Headers.ToString())
   
           ' Get the response stream.
           Dim strm As Stream = HttpWResponse.GetResponseStream()
   
           ' Read the response stream.
           Dim sr As StreamReader = New StreamReader(strm)
           Dim sText As String = sr.ReadToEnd()
           Console.WriteLine("Response: {0}", sText)
   
           ' Close the stream.
           strm.Close()
   
           ' Clean up
           HttpWRequest = Nothing
           HttpWResponse = Nothing
           MyCredentialCache = Nothing
           myCred = Nothing
           strm = Nothing
           sr = Nothing
       End Sub
   End Module

5. Search for TODO in the code, and then modify the code for your environment.
6. Press F5 to build and to run the program.
7. Make sure that the object has been deleted.