C＃在完全加载页面时捕获HTTP响应

Question

我想发送一个http post请求并捕获响应。我写了下面的代码。

System.Net.WebRequest req = System.Net.WebRequest.Create(URI); 
    req.Proxy = new System.Net.WebProxy(ProxyString, true); 
    //Add these, as we're doing a POST 
    req.ContentType = "application/x-www-form-urlencoded"; 
    req.Method = "POST"; 
    //We need to count how many bytes we're sending. 
    //Post'ed Faked Forms should be name=value& 
    byte [] bytes = System.Text.Encoding.ASCII.GetBytes(Parameters); 
    req.ContentLength = bytes.Length; 
    System.IO.Stream os = req.GetRequestStream(); 
    os.Write (bytes, 0, bytes.Length); //Push it out there 
    os.Close(); 
    System.Net.WebResponse resp = req.GetResponse(); 
    if (resp== null) return null; 
    System.IO.StreamReader sr = 
     new System.IO.StreamReader(resp.GetResponseStream()); 
    return sr.ReadToEnd().Trim(); 

更新1：

我试图利用PostAsync方法。还是一样的结果。

public static async void Req() 
     { 
      using (var client = new HttpClient()) 
      { 
       var values = new Dictionary<string, string> 
    { 
     { "type1", "val1" }, 
     { "type2", "val2" }, 
     { "type3", "val3"} 
    }; 
       var content = new FormUrlEncodedContent(values); 
       var r1 = await client.PostAsync(URL, content); 

       var responseString = await r1.Content.ReadAsStringAsync(); 
       Console.WriteLine(responseString); 
       Console.ReadLine(); 
      } 
     } 

但它只捕获部分响应。我的页面需要10-12秒才能加载。如何让我的脚本等待并捕获完整的响应？

Answer 1

工作代码。只需将正确的参数传递给方法即可。

public static async void Req() 
{ 
    using (var client = new HttpClient()) 
    { 
     var values = new Dictionary<string, string> 
     { 
      { "type1", "val1" }, 
      { "type2", "val2" }, 
      { "type3", "val3"} 
     }; 
      var content = new FormUrlEncodedContent(values); 
      var r1 = await client.PostAsync(URL, content); 

      var responseString = await r1.Content.ReadAsStringAsync(); 
      Console.WriteLine(responseString); 
      Console.ReadLine(); 
     } 
    } 
} 

Answer 2

这可能是由于响应编码为som其他编码，然后是StreamReader默认的UTF8编码。请检查响应的编码和改变呼叫从

new System.IO.StreamReader(resp.GetResponseStream()); 

到的StreamReader到

new System.IO.StreamReader(resp.GetResponseStream(), Encoding.ASCII); 

为ASCII编码