HttpWeb 请求。远程服务器返回错误：(500) Internal Server Error

Question

我需要有关 C# 中 HttpWebRequest 的帮助。下面的代码行对于本地 IIS 工作正常，但是当我上传到远程服务器时，它开始给我“远程服务器返回错误：（500）内部服务器错误。”。我尝试了 GET 和 POST 方法的许多变体，但无法弄清楚问题所在。请查看下面的代码，让我知道这有什么问题。

try
{
    string postData = "applicaitonid=abc&deviceid=xyz";
    string uri = System.Configuration.ConfigurationManager.AppSettings.Get("baseUrl") + System.Configuration.ConfigurationManager.AppSettings.Get("ABApiPath") + "ConfirmAppBinding/?" + postData;

    System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(uri);
    request.Method = "POST"; // Set type Post
    //request.Method = "GET";
    request.UserAgent = Request.UserAgent.ToString();
    request.ContentType = @"application/json";
    request.MediaType = "application/json";
    request.Accept = "application/json";
    request.KeepAlive = false;
    request.ProtocolVersion = HttpVersion.Version11;
    //byte[] buffer = Encoding.GetEncoding("UTF-8").GetBytes(postData);
    request.Timeout = 500000;             //Increase timeout for testing

    Stream reqstr = request.GetRequestStream();
    //reqstr.Write(buffer, 0, buffer.Length);
    reqstr.Close();

    // Read Response
    var httpResponse = request.GetResponse();
    using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
    {
        JavaScriptSerializer jsSerializer = new JavaScriptSerializer();
        JsonMessage.message = streamReader.ReadToEnd();
        streamReader.Close();
    }
}
catch (WebException e)
{
    JsonMessage.message = e.Message;
    return Json(JsonMessage, JsonRequestBehavior.AllowGet);
}

正如我告诉你的，我使用了默认的 GET 方法，但它并没有解决问题。

Answer 1

使用此代码进行捕获

catch (WebException e)
{
   string pageContent = new StreamReader(wex.Response.GetResponseStream()).ReadToEnd().ToString();
   return pageContent;
}

它将显示您所面临的确切错误。

Answer 2

您可以使用 try 和 catch 块来查找根本原因。

catch (WebException ex)
{
    string message = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
}

Answer 3

我会在黑暗中刺伤

可能是您的查询字符串中有拼写错误，并且当在代码中引用该键时，它会返回一个空值异常？

{ String postData = "applicaitonid=abc&deviceid=xyz"; 
}

应该是

{ String postData = "applicationid=abc&deviceid=xyz";  }