使用c#取得未读邮件信息(exchange)

3ewsd

　　/// <summary>
  /// 取得未读邮件信息
  /// </summary>
  /// <returns></returns>
  private int GetUnReadMailCount(string strUserID,string strPassword)
  {
   string url= ConfigurationSettings.AppSettings[&quot;ExchangeServer&quot;];   
   System.Net.HttpWebRequest Request;
   System.Net.WebResponse Response;
   System.Net.CredentialCache MyCredentialCache;
   string strRootURI = url+&quot;/&quot;+strUserID;
   string strUserName = strUserID;
   strPassword = strPassword;
   string strDomain = ConfigurationSettings.AppSettings[&quot;ExchangeDomain&quot;];
   string strQuery =&quot;&quot;;
   byte[] bytes = null;
   System.IO.Stream RequestStream = null;
   System.IO.Stream ResponseStream = null;
   XmlDocument ResponseXmlDoc = null;
   XmlNodeList HrefNodes= null;
   XmlNodeList SizeNodes= null;
   int count=0;
   try
   {
    // Build the SQL query.
    strQuery = &quot;<?xml version=/&quot;1.0/&quot;?><D:searchrequest xmlns:D = /&quot;DAV:/&quot; >&quot;
     + &quot;<D:sql>SELECT /&quot;DAV:displayname/&quot;,/&quot;urn:schemas:httpmail:unreadcount/&quot; FROM /&quot;&quot; + strRootURI + &quot;/&quot;&quot;
     //    +&quot;where /&quot;DAV:contentclass/&quot;=/&quot;urn:schemas:httpmail:read /&quot;&quot;            
     //        + &quot;WHERE /&quot;DAV:ishidden/&quot; = false AND /&quot;DAV:isfolder/&quot; = false&quot;
     + &quot;</D:sql></D:searchrequest>&quot;;
　　// Create a new CredentialCache object and fill it with the network
    // credentials required to access the server.
    MyCredentialCache = new System.Net.CredentialCache();
    MyCredentialCache.Add( new System.Uri(strRootURI),
     &quot;Basic&quot;,
     new System.Net.NetworkCredential(strUserName, strPassword, strDomain)//
     );//NTLM集成windows验证
　　// Create the HttpWebRequest object.
    Request = (System.Net.HttpWebRequest)HttpWebRequest.Create(strRootURI);
　　// Add the network credentials to the request.
    Request.Credentials = MyCredentialCache;
　　// Specify the method.
    Request.Method = &quot;SEARCH&quot;;
　　// Encode the body using UTF-8.
    bytes = Encoding.UTF8.GetBytes((string)strQuery);
　　// Set the content header length.  This must be
    // done before writing data to the request stream.
    Request.ContentLength = bytes.Length;
　　// Get a reference to the request stream.
    RequestStream = Request.GetRequestStream();
　　// Write the SQL query to the request stream.
    RequestStream.Write(bytes, 0, bytes.Length);
　　// Close the Stream object to release the connection
    // for further use.
    RequestStream.Close();
　　// Set the content type header.
    Request.ContentType = &quot;text/xml&quot;;
　　// Send the SEARCH method request and get the
    // response from the server.
    Response = (HttpWebResponse)Request.GetResponse();
        
    // Get the XML response stream.
    ResponseStream = Response.GetResponseStream();
            
    // Create the XmlDocument object from the XML response stream.
    ResponseXmlDoc = new XmlDocument();
    ResponseXmlDoc.Load(ResponseStream);
    HrefNodes = ResponseXmlDoc.GetElementsByTagName(&quot;a:displayname&quot;);
    SizeNodes = ResponseXmlDoc.GetElementsByTagName(&quot;d:unreadcount&quot;);
    for(int i=0;i<HrefNodes.Count;i++)
    {
     if(HrefNodes.InnerText==&quot;收件箱&quot;)
      count=int.Parse(SizeNodes.InnerText);
    }
    ResponseStream.Close();
    Response.Close();
   }
   catch(Exception)
   {
    // Catch any exceptions. Any error codes from the SEARCH
    // method request on the server will be caught here, also.
    return -1;
   }
   return count;
  }