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How to use the HttpWebRequest class and the HttpWebResponse class to send an e-mail message by using Visual Basic .NET


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This article was previously published under Q314199

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Summary

This article describes how to use the HttpWebRequest class and the HttpWebResponse class from the "System.Net" namespace to send a simple e-mail message by using Microsoft Visual Basic .NET.

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More information

To send a simple e-mail message by using Visual Basic .NET, follow these steps:
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 name of the computer that is running Exchange 2000.
        Dim strServer As String = "ExchServer"
        ' TODO: Replace with the sender's alias.
        Dim strSenderAlias As String = "sender"
        ' TODO: Replace with the sender's e-mail address.
        Dim strFrom As String = "sender@example.com"
        ' TODO: Replace with the recipient's e-mail address.
        Dim strTo As String = "recipient@example.com"
        Dim strSubject As String = "Send Using HttpWebRequest"
        Dim strBody As String = "Hello World"

        Dim sUri As String

        sUri = "http://" & strServer & "/Exchange/" & strSenderAlias & _
                "/%23%23DavMailSubmissionURI%23%23/"

        Dim myUri As System.Uri = New System.Uri(sUri)
        Dim HttpWRequest As HttpWebRequest = WebRequest.Create(myUri)

        Dim sQuery As String
        sQuery = "From: " & strFrom & vbNewLine & _
         "To: " & strTo & vbNewLine & _
         "Subject: " & strSubject & vbNewLine & _
         "Date: " & DateTime.Now.ToString() & vbNewLine & _
         "X-Mailer: My DAV mailer" & vbNewLine & _
         "MIME-Version: 1.0" & vbNewLine & _
         "Content-Type: text/plain" & vbNewLine & _
         "Charset = ""iso-8859-1""" & vbNewLine & _
         "Content-Transfer-Encoding: 7bit" & vbNewLine & vbNewLine & _
         strBody

        ' TODO: Replace with the appropriate user credentials.
        Dim myCred As NetworkCredential = New NetworkCredential("Domain\UserName", "Password")
        Dim MyCredentialCache As CredentialCache = New CredentialCache()
        MyCredentialCache.Add(myUri, "Basic", myCred)
        HttpWRequest.Credentials = MyCredentialCache

        ' Set the headers.
        HttpWRequest.Headers.Set("Translate", "f")
        HttpWRequest.ContentType = "message/rfc822"
        HttpWRequest.ContentLength = sQuery.Length

        'Set the request timeout to 5 minutes.
        HttpWRequest.Timeout = 300000
        ' set the request method
        HttpWRequest.Method = "PUT"

        ' Store the data in a byte array.
        Dim ByteQuery() As Byte = System.Text.Encoding.ASCII.GetBytes(sQuery)
        HttpWRequest.ContentLength = ByteQuery.Length
        Dim QueryStream As Stream = HttpWRequest.GetRequestStream()
        ' write the data to be posted to the Request Stream
        QueryStream.Write(ByteQuery, 0, ByteQuery.Length)
        QueryStream.Close()

        ' 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 e-mail message was sent and received.

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Keywords: KB314199, kbhowtomaster

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Article Info
Article ID : 314199
Revision : 1
Created on : 4/12/2004
Published on : 4/12/2004
Exists online : False
Views : 355