我的HttpWebRequest有什么问题

Question

我不知道我的代码中缺少什么。

如果我拨打404网址，我的代码会获得例外。

HttpWebRequest req = WebRequest.Create(args.Url) as HttpWebRequest;
req.AllowAutoRedirect = true;
req.Timeout = args.TimeOut;
req.UserAgent = args.UserAgent;   
HttpWebResponse answer = req.GetResponse() as HttpWebResponse;
objResult.Status =answer.StatusCode;
Stream stream = answer.GetResponseStream();

我在req.GetResponse（）上得到一个例外

我得到了错误

远程服务器返回错误：（404）Not Found。

我不应该收到HttpStatusCode.NotFound吗？

解决方案 ：

try
      {
        HttpWebRequest req = WebRequest.Create(args.Url) as HttpWebRequest;
        req.AllowAutoRedirect = true;
        req.Timeout = args.TimeOut;
        req.UserAgent = args.UserAgent;       
        HttpWebResponse answer = req.GetResponse() as HttpWebResponse;

        objResult.Status =answer.StatusCode;       
      }
      catch (WebException ex)
      {
        HttpWebResponse response = ex.Response as HttpWebResponse;
        objResult.Status = response.StatusCode;       
      }

Answer 1

HttpWebRequest在非成功的响应状态上抛出异常。
此行为是设计使然。

您可以通过捕获WebException并检查其Response属性来获取Response 。