以编程方式从 Exchange Server 2010 邮箱读取电子邮件

Question

我们有一个 C# 应用程序，它使用 http 服务读取当前托管在 Exchange 2003 上的电子邮件收件箱。

现在，邮箱将迁移到 Exchange 2010 服务器，因此我们正在测试代码以确认它仍然可以工作。

我们收到错误"错误请求"，其中包含以下代码（尝试获取所有邮件）： public static XmlDocument GetUnreadMailAll（） { HttpWebRequest loRequest = default（HttpWebRequest）; HttpWebResponse loResponse = default（HttpWebResponse）; 字符串 lsRootUri = 空; 字符串 lsQuery = 空; byte[] laBytes = null;

        Stream loRequestStream = default(Stream);
        Stream loResponseStream = default(Stream);
        XmlDocument loXmlDoc = default(XmlDocument);
        loXmlDoc = new XmlDocument();
        try
        {
            lsRootUri = strServer + "/Exchange/" + strAlias + "/" + strInboxURL;
            lsQuery = "<?xml version="1.0"?>"
                + "<D:searchrequest xmlns:D = "DAV:" xmlns:m="urn:schemas:httpmail:">"
                + "<D:sql>SELECT "
                + ""urn:schemas:httpmail:to", "
                + ""urn:schemas:httpmail:displayto", "
                + ""urn:schemas:httpmail:from", "
                + ""urn:schemas:httpmail:fromemail", "
                + ""urn:schemas:httpmail:subject", "
                + ""urn:schemas:httpmail:textdescription", "
                //+ ""urn:schemas:httpmail:htmldescription", "
                + ""urn:schemas:httpmail:hasattachment", "
                + ""urn:schemas:httpmail:attachmentfilename", "
                + ""urn:schemas:httpmail:senderemail", "
                + ""urn:schemas:httpmail:sendername", "
                + ""DAV:displayname", "
                + ""urn:schemas:httpmail:datereceived", "
                + ""urn:schemas:httpmail:read", "
                + ""DAV:id" "
                + "FROM "" + lsRootUri
                + "" WHERE "DAV:ishidden" = false "
                + "AND "DAV:isfolder" = false "
                + "AND "urn:schemas:httpmail:read" = false "
                + "AND "urn:schemas:httpmail:fromemail" != '[e-mail]' "
                + "</D:sql></D:searchrequest>";
            loRequest = (HttpWebRequest)WebRequest.Create(lsRootUri);
            loRequest.Credentials = new NetworkCredential(strUserName, strPassword);
            loRequest.Method = "SEARCH";
            laBytes = System.Text.Encoding.UTF8.GetBytes(lsQuery);
            loRequest.ContentLength = laBytes.Length;
            loRequestStream = loRequest.GetRequestStream();
            loRequestStream.Write(laBytes, 0, laBytes.Length);
            loRequestStream.Close();
            loRequest.ContentType = "text/xml";
            loRequest.Headers.Add("Translate", "F");
            loResponse = (HttpWebResponse)loRequest.GetResponse();
            loResponseStream = loResponse.GetResponseStream();
            loXmlDoc.Load(loResponseStream);
            loResponseStream.Close();
        }

异常在行上引发loResponseStream = loResponse.GetResponseStream();

以下是我们要发送的 XML：

  <?xml version="1.0" ?> 
- <D:searchrequest xmlns:D="DAV:" xmlns:m="urn:schemas:httpmail:">
  <D:sql>SELECT "urn:schemas:httpmail:to", "urn:schemas:httpmail:displayto", "urn:schemas:httpmail:from", "urn:schemas:httpmail:fromemail", "urn:schemas:httpmail:subject", "urn:schemas:httpmail:textdescription", "urn:schemas:httpmail:hasattachment", "urn:schemas:httpmail:attachmentfilename", "urn:schemas:httpmail:senderemail", "urn:schemas:httpmail:sendername", "DAV:displayname", "urn:schemas:httpmail:datereceived", "urn:schemas:httpmail:read", "DAV:id" FROM "https://domain/Exchange/bbtest/Inbox" WHERE "DAV:ishidden" = false AND "DAV:isfolder" = false AND "urn:schemas:httpmail:read" = false AND "urn:schemas:httpmail:fromemail" != '[e-mail]'</D:sql> 
  </D:searchrequest>

Answer 1

从 MSDN 开始，答案是 WebDAV 在 Exchange 2007 之后被弃用，取而代之的是 Exchange Web Services

这里有几个链接：

• MSDN 库：Exchange Web 服务入门
• OMEGACODER：使用 Exchange Web Services 从 Exchange 获取所有电子邮件
• MSDN 代码下载： 交换 - 101 个示例