c# - 中止请求 wp7

Question

如果我中止请求，则会出现 WebException。如何检查请求是否被中止？

// if (asynchronousResult.AsyncState !="Aborted" ) {
            HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);//WebException if aborted
            Stream streamResponse = response.GetResponseStream();
            StreamReader streamRead = new StreamReader(streamResponse);
            do_after(streamRead.ReadToEnd());
            streamResponse.Close();
            streamRead.Close();
            response.Close();
    //    }

Answer 1

try
{
    HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asynchronousResult);//WebException if aborted
}
catch(WebException e)
{
  if(e.Status == WebExceptionStatus.RequestCanceled)
    {
      //WORK
    }
}

来自文档:

Abort 方法取消对资源的请求。取消请求后，调用 BeginGetResponse、EndGetResponse、BeginGetRequestStream 或 EndGetRequestStream 方法会导致 WebException，Status 属性设置为 RequestCanceled。

来源:http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.abort(v=VS.95 )