WebDAV方式访问Exchange 2003收件箱程序

 public DataTable GetUnReadMail()
 {
    string url = "http://ip/exchange/"; //指定Exchange服务器地址 
    System.Net.HttpWebRequest Request;
    System.Net.WebResponse Response;
    System.Net.CredentialCache MyCredentialCache;
    string strUserName = "administrator"; //指定登录的用户名
    string strRootURI = url + strUserName.Trim() + "/收件箱/"; //得到要访问邮箱的WebDAV地址
    string strPassword = "test"; //指定该用户的密码
    string strDomain = "test"; //指定域名
    string strQuery = "";
    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
    {

        // 用SQL查询WebDAV返回结果中的unreadcount节点.
        //strQuery = "<?xml version=\"1.0\"?><D:searchrequest xmlns:D = \"DAV:\" >"
        // + "<D:sql>SELECT \"DAV:displayname\",\"urn:schemas:httpmail:subject\",\"urn:schemas:httpmail:unreadcount\" FROM \"" + strRootURI + "\""
        // + "</D:sql></D:searchrequest>";
        strQuery = "<?xml version=\"1.0\"?><D:searchrequest xmlns:D = \"DAV:\" >"
            + "<D:sql>SELECT \"urn:schemas:httpmail:importance\",\"urn:schemas:httpmail:from\",\"urn:schemas:httpmail:read\",\"urn:schemas:httpmail:datereceived\",\"urn:schemas:httpmail:subject\",\"urn:schemas:httpmail:hasattachment\","
            + "\"urn:schemas:httpmail:date\","
    + "\"DAV:contentclass\",\"DAV:getcontentlength\",\"DAV:displayname\""
            + "FROM \"" + strRootURI + "\""
            + "WHERE \"DAV:ishidden\" = false AND \"DAV:isfolder\" = false"
            + "</D:sql></D:searchrequest>";


        // 创建新的CredentialCache对象，构建身份凭据
        MyCredentialCache = new System.Net.CredentialCache();
        MyCredentialCache.Add(new System.Uri(strRootURI),
            "NTLM",
            new System.Net.NetworkCredential(strUserName, strPassword, strDomain)
            );

        // Create the HttpWebRequest object.
        Request = (System.Net.HttpWebRequest)HttpWebRequest.Create(strRootURI);

        // 指定HttpWebRequest的身份凭据，此处为关键所在。如果使用之前
        // 创建的MyCredentialCache，则这个身份凭据是可以从Web服务器传递
        // 到Exchange服务器的，但是这样带来的问题也很明显，就是不能够自
        // 动获取当前登录到域的用户的身份。即便已经成功登录到域，那也只
        // 能通过form再次输入用户名密码。因此，我在这里用的是
        // Request.Credentials = CredentialCache.DefaultCredentials，
        // 这样便可以获得当前用户的凭据，但是这样带来的问题便是上面提到的
        // 身份凭据无法传递的问题，解决方法请关注下篇文章。
        Request.Credentials = MyCredentialCache;

        // 指定WebDAV的SEARCH方法
        Request.Method = "SEARCH";

        // 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 = "text/xml";

        // Send the SEARCH method request and get the
        // response from the server.
        Response = (HttpWebResponse)Request.GetResponse();

        // Get the XML response stream.
        ResponseStream = Response.GetResponseStream();

        // 创建XmlDocument对象，并获取收件箱的unreadcount节点的值
        ResponseXmlDoc = new XmlDocument();
        ResponseXmlDoc.Load(ResponseStream);
        //HrefNodes = ResponseXmlDoc.GetElementsByTagName("a:displayname");
        //SizeNodes = ResponseXmlDoc.GetElementsByTagName("d:unreadcount");
        //for (int i = 0; i < HrefNodes.Count; i++)
        //{
        //    if (HrefNodes[i].InnerText == "收件箱")
        //        count = int.Parse(SizeNodes[i].InnerText);
        //}
        //ResponseStream.Close();
        //Response.Close();
        XmlNodeList idNodes = ResponseXmlDoc.GetElementsByTagName("a:displayname");
        XmlNodeList SenderNodes = ResponseXmlDoc.GetElementsByTagName("d:from");
        XmlNodeList importanceNodes = ResponseXmlDoc.GetElementsByTagName("d:importance");
        XmlNodeList contextclassNodes = ResponseXmlDoc.GetElementsByTagName("a:contentclass");
        XmlNodeList readNodes = ResponseXmlDoc.GetElementsByTagName("d:read");
        XmlNodeList datareceiveNodes = ResponseXmlDoc.GetElementsByTagName("d:datereceived");
        XmlNodeList subjectNodes = ResponseXmlDoc.GetElementsByTagName("d:subject");
        XmlNodeList getcontentlengthNodes = ResponseXmlDoc.GetElementsByTagName("a:getcontentlength");
        XmlNodeList hasattachmentNodes = ResponseXmlDoc.GetElementsByTagName("d:hasattachment");
        XmlNodeList hrefNodes = ResponseXmlDoc.GetElementsByTagName("a:href");
        XmlNodeList dateNodes = ResponseXmlDoc.GetElementsByTagName("d:date");

        DataTable dt = new DataTable();

        dt.Columns.Add("Subject");
        dt.Columns.Add("Href");
        dt.Columns.Add("Time");
        dt.Columns["Time"].DataType = Type.GetType("System.DateTime");

        for (int j = 0; j < readNodes.Count; j++)
        {
            //if (readNodes[j].InnerText == "1")continue;//只取未读邮件

            dt.Rows.Add(subjectNodes[j].InnerText, hrefNodes[j].InnerText, DateTime.Parse(datareceiveNodes[j].InnerText));

        }
        ResponseStream.Close();
        Response.Close();


        return dt;
    }
    catch
    {
        return null;
    }
}

 

 该方法来源于网络，近日用到收藏于此。