Microsoft KB Archive/314196

= How to list folders or items in a user's mailbox by using the HttpWebRequest class and the HttpWebResponse class in Visual Basic .NET =

Article ID: 314196

Article Last Modified on 4/13/2004

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Visual Basic .NET 2002 Standard Edition
 * Microsoft Visual Basic .NET 2003 Standard Edition

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This article was previously published under Q314196





For a Microsoft Visual C# .NET version of this article, see 313129.



SUMMARY
This article describes how to use the HttpWebRequest class and the HttpWebResponse class from the &quot;System.Net&quot; namespace to list folders or items in a user's mailbox on a computer that is running Microsoft Exchange 2000 Server by using Microsoft Visual Basic .NET.



MORE INFORMATION
To list folders or items in a user's mailbox, follow these steps:  Start Microsoft Visual Studio .NET. On the File menu, point to New, and then click Project. In the Visual Basic Projects types list, click Console Application.

By default, the Module1.vb file is created.  In the code window, replace the code with the following: Imports System.Net Imports System.IO

Module Module1 Sub Main ' TODO: Replace with your folder URL. Dim sUri As String = &quot;http://ExchServer/public/&quot; Dim myUri As System.Uri = New System.Uri(sUri) Dim HttpWRequest As HttpWebRequest = WebRequest.Create(myUri)

Dim sQuery As String sQuery = &quot;&quot; & _ &quot;&quot; & _ &quot;SELECT &quot;&quot;DAV:displayname&quot;&quot; &quot; & _ &quot;FROM SCOPE('SHALLOW TRAVERSAL OF &quot;&quot;&quot; & sUri & &quot;&quot;&quot;')&quot; ' TODO: Make DAV:isfolder = true if you want to retrieve subfolders, ' and make DAV:isfolder = false to retrieve items. sQuery = sQuery & &quot; WHERE &quot;&quot;DAV:isfolder&quot;&quot; = false&quot; & _ &quot;</g:sql>&quot; & _ &quot;</g:searchrequest>&quot;

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

'Set the headers. HttpWRequest.KeepAlive = False HttpWRequest.Headers.Set(&quot;Pragma&quot;, &quot;no-cache&quot;) HttpWRequest.Headers.Set(&quot;Translate&quot;, &quot;f&quot;) HttpWRequest.Headers.Set(&quot;Depth&quot;, &quot;0&quot;) HttpWRequest.ContentType = &quot;text/xml&quot; HttpWRequest.ContentLength = sQuery.Length

'Set the request timeout to 5 minutes. HttpWRequest.Timeout = 300000 ' set the request method HttpWRequest.Method = &quot;SEARCH&quot;

'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(&quot;Status: {0} {1}&quot;, sStatus, HttpWResponse.StatusDescription.ToString)

Console.WriteLine(&quot;Request Headers:&quot;) Console.WriteLine(HttpWRequest.Headers.ToString) Console.WriteLine(&quot;Response Headers:&quot;) 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(&quot;Response: {0}&quot;, sText)

' Close the stream. strm.Close

' Clean up       HttpWRequest = Nothing HttpWResponse = Nothing MyCredentialCache = Nothing myCred = Nothing strm = Nothing sr = Nothing End Sub End Module </li> Search for the TODO text string in the code, and then modify the code for your environment.</li> Press F5 to build and to run the program.</li> Make sure that the folders or the items have been retrieved from the response stream.</li></ol>

Keywords: kbhowtomaster KB314196

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