WebClient的cookie

由于WebClient没有保存cookie的功能，需要包装下

private class CookieAwareWebClient : WebClient {     public CookieAwareWebClient()         : this(new CookieContainer())     { }     public CookieAwareWebClient(CookieContainer c)     {         this.CookieContainer = c;     }     public CookieContainer CookieContainer { get; set; }      protected override WebRequest GetWebRequest(Uri address)     {         WebRequest request = base.GetWebRequest(address);         if (request is HttpWebRequest)         {             (request as HttpWebRequest).CookieContainer = this.CookieContainer;         }         return request;     } } 

使用例子如下：

CookieAwareWebClient myWebClient = new(CookieContainer)

 myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");            NameValueCollection myQueryStringCollection = new NameValueCollection();            myQueryStringCollection.Add("authenticity_token", Controller.HttpLoader.getToken());            myWebClient.QueryString = myQueryStringCollection;            myWebClient.UploadFileAsync(new Uri(uriString), "POST", "test.txt");            myWebClient.UploadFileCompleted += new UploadFileCompletedEventHandler(wc_UploadFileCompleted);