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How to use the HttpWebRequest class and the HttpWebResponse class to search for items on a computer that is running Exchange 2000 Server in Visual C#


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This article was previously published under Q313129

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Summary

This article describes how to use the HttpWebRequestclass and the HttpWebResponse class in the "System.Net" namespace to search for items on a computer that is running Microsoft Exchange 2000 Server by using Microsoft Visual C#.

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More information

To search for an item on a computer that is running Exchange 2000 by using Visual C# , follow these steps:
  1. Start Microsoft Visual Studio .NET or Microsoft Visual Studio 2005.
  2. On the File menu, point to New, and then click Project.
  3. In the Visual C# Projects types list, click Console Application.

    Note In Visual Studio 2005, click Console Application in the Visual C# list.

    In Visual Studio .NET, Class1.cs is created by default. In Visual Studio 2005, Program.cs is created by default.
  4. In the code window, replace the code with the following:
    using System;
    using System.Net;
    using System.IO;      
    
    namespace WebDavNET
    {
      /// <summary>
      /// Summary description for Class1.
      /// </summary>
      class Class1
      {
        static void Main(string[] args)
        {
          try 
          {
            // TODO: Replace with the URL of an object on the computer that is running Exchange 2000.
            string sUri = "http://ExchServer/Exchange/UserAlias/Inbox/";
    
            System.Uri myUri = new System.Uri(sUri);
            HttpWebRequest HttpWRequest = (HttpWebRequest)WebRequest.Create(myUri);
    
            string sQuery;
            sQuery = "<?xml version='1.0'?>" + 
              "<g:searchrequest xmlns:g='DAV:'>" +
              "<g:sql>SELECT \"DAV:displayname\" " +
              "FROM SCOPE('SHALLOW TRAVERSAL OF \"" + sUri + "\"') " +
              "WHERE \"DAV:isfolder\" = false" + 
              "</g:sql>" +
              "</g:searchrequest>";
    
            // Set the credentials.
            // TODO: Replace with the appropriate user credentials.
            NetworkCredential myCred = new NetworkCredential(@"DomainName\UserName", "UserPassword");
            CredentialCache myCredentialCache = new CredentialCache();
            myCredentialCache.Add(myUri, "Basic", myCred);
            HttpWRequest.Credentials = myCredentialCache;
    
            // Set the headers.
            HttpWRequest.KeepAlive = false;
            HttpWRequest.Headers.Set("Pragma", "no-cache");
    
            HttpWRequest.Headers.Set("Translate", "f");
            HttpWRequest.Headers.Set("Depth", "0");
            HttpWRequest.ContentType =  "text/xml";
            HttpWRequest.ContentLength = sQuery.Length;
    
            //Set the request timeout to 5 minutes.
            HttpWRequest.Timeout = 300000;
            // Set the request method.
            HttpWRequest.Method = "SEARCH";
    
    
            //Store the data in a byte array.
            byte[] ByteQuery = System.Text.Encoding.ASCII.GetBytes(sQuery);
            HttpWRequest.ContentLength = ByteQuery.Length;
            Stream QueryStream = 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.
            HttpWebResponse HttpWResponse = (HttpWebResponse)HttpWRequest.GetResponse();
    
            
            // Get the Status code.
            int iStatCode =  (int)HttpWResponse.StatusCode;
            string sStatus = iStatCode.ToString();
            Console.WriteLine("Status Code: {0}", sStatus);
            // Get the request headers
            string sReqHeaders = HttpWRequest.Headers.ToString();
            Console.WriteLine(sReqHeaders);
    
            // Read the Response Stream.
            Stream strm = HttpWResponse.GetResponseStream();
            StreamReader sr = new StreamReader(strm);
            string sText = sr.ReadToEnd();
            Console.WriteLine("Response: {0}", sText);
    
            // Close the stream.
            strm.Close();
    
            // Clean up
            myCred = null;
            myCredentialCache = null;
            HttpWRequest = null;
            HttpWResponse = null;
            QueryStream = null;
            strm = null;
            sr = null;
           
          }
          catch (Exception e)
          {
            Console.WriteLine("{0} Exception caught.", e);
          }
        }
      }
    }
  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 correct items are received from the response.

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Keywords: KB313129, kbhowto, kbmsg, kbcode

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Article Info
Article ID : 313129
Revision : 7
Created on : 12/11/2006
Published on : 12/11/2006
Exists online : False
Views : 461