.NET线程 – HttpWebRequest BeginGetResponse + AutoResetEvent

我想知道两者中的哪种方法是更好的实现？ 我需要创建一个范围在200到5秒之间的Web请求。 我需要继续执行html响应 – 所以需要在主线程上阻塞。

第一种方法

string GetResponse() { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url); IAsyncResult result = request.BeginGetResponse(null, null); using (HttpWebResponse httpResponse = (HttpWebResponse)request.EndGetResponse(result)) { using (Stream dataStream = httpResponse.GetResponseStream()) { StreamReader reader = new StreamReader(dataStream); response = reader.ReadToEnd(); } } 

第二种方法

 string response = string.Empty; AutoResetEvent waitHandle = null; void GetResponse(string url) { waitHandle = new AutoResetEvent(false); try { HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url); IAsyncResult asyncResult = request.BeginGetResponse(Callback, request); waitHandle.WaitOne(); } catch { } finally { waitHandle.Close(); } } void Callback(IAsyncResult asyncResult) { HttpWebRequest request = (HttpWebRequest)asyncResult.AsyncState; try { using (HttpWebResponse httpResponse = (HttpWebResponse)request.EndGetResponse(asyncResult)) { if (httpResponse.StatusCode == HttpStatusCode.OK) { using (Stream dataStream = httpResponse.GetResponseStream()) { StreamReader reader = new StreamReader(dataStream); response = reader.ReadToEnd(); } } } } catch { } finally { waitHandle.Set(); } } 

Answer 1

为什么不在主线程上执行Web请求？ 如果你想要阻止主线程，这是迄今为止最简单的方法。