可以通過WEBDAV的方法讀取Exchange的郵件信息,在E8.Net工作流架構的應用程序中有過這樣開發案例,因為客戶可能一開始不習慣用OUTLOOK等工具去閱讀郵件,所以通過。NET程序讀取Exchange中的郵件信息,展示在用戶的首頁上。
代碼如下:
/**//// <summary>
/// 取得未讀郵件信息
/// </summary>
/// <returns></returns>
private string GetUnReadMailList(string strUserID, string strPassWord)
...{
string url = System.Configuration.ConfigurationManager.APPSettings["ExchangeServer"];
System.Net.HttpWebRequest Request;
System.Net.WebResponse Response;
System.Net.CredentialCache MyCredentialCache;
string strRootURI = url + "/" + strUserID + "/收件箱";
string strUserName = strUserID;
//string strDomain = ConfigurationSettings.APPSettings["ExchangeDomain"];
string strDomain = System.Configuration.ConfigurationManager.APPSettings["Domain"];
string strQuery = "";
byte[] bytes = null;
System.IO.Stream RequestStream = null;
System.IO.Stream ResponseStream = null;
XmlDocument ResponseXMLDoc = null;
; Epower.DevBase.Organization.SqlDAL.UserEntity user = new Epower.DevBase.Organization.SqlDAL.UserEntity(strUserID);
string strEmailXML = "";
try
...{
strQuery = "<?xml version="1.0"?><D:searchrequest XMLns:D = "DAV:" >"
+ "<D:sql>SELECT "DAV:displayname","urn:schemas:mailheader:subject","
// + ""urn:schemas:mailheader:approved ","
// + ""urn:schemas:mailheader:comment ","
+ ""urn:schemas:mailheader:from","
+ ""urn:schemas:mailheader:date" FROM "" + strRootURI + """
+ "where "urn:schemas:httpmail:read"=false"
// + "WHERE "DAV:ishidden" = false AND "DAV:isfolder" = false"
+ "</D:sql></D:searchrequest>";
//集成驗證方式下代碼
Request = (System.Net.HttpWebRequest)HttpWebRequest.Create(strRootURI);
Request.Timeout = 300000; //超時 5分鐘
MyCredentialCache = new System.Net.CredentialCache();
MyCredentialCache.Add(new System.Uri(strRootURI),
"NTLM",
new System.Net.NetworkCredential(strUserName, user.PassWord, strDomain)//
);//NTLM集成Windows驗證 Basic 基本驗證
Request.Credentials = MyCredentialCache;
//Request.Credentials = CredentialCache.DefaultNetworkCredentials;
// Specify the method.
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;charset="utf-8"";
// 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);
strEmailXml = ResponseXmlDoc.InnerXML;
ResponseStream.Close();
Response.Close();
}
catch (Exception e)
...{
// Catch any exceptions. Any error codes from the SEARCH
// method request on the server will be caught here, also.
return "";
}
return strEmailXML;
}
返回的也是XML串,經過一些處理便可以以一定的格式展示郵件的信息了
代碼的關鍵是 strQuery的XML查詢串
相關語法及信息可以參考:
http://msdn2.microsoft.com/en-us/library/ms527286.ASPx
從這裡可以找到各種字段和命名空間的意義.
通過 WebDav的方法 不但可以取得exchange郵件的信息、郵件數量,還可以與Exchange日歷進行交互。
在E8.Net工作流的一些合作伙伴中已經實現在 工作流的業務處理接口中,根據預計時間將待辦事項寫入Exchange的日歷中。 用戶通過OUTLOOK的日歷直接進入事項的相關處理。實現方法也是通過WEBDAV。 與獲取郵件的方法類似。