c# - 获取 WebException 错误中的错误编号

Question

如何获取WebException错误中的错误号？

try
{
     HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("site");
     HttpWebResponse response = (HttpWebResponse)request.GetResponse();
     Stream stream = response.GetResponseStream();
     int i = stream.ReadByte();
}
catch (WebException e)
{
     //How To Get Error number in WebException Error?
}

Answer 1

您需要运行测试以确保它是一个ProtocolError:

if (e.Status == WebExceptionStatus.ProtocolError) 
{
    Console.WriteLine("Status Code : {0}", ((HttpWebResponse)e.Response).StatusCode);
    Console.WriteLine("Status Description : {0}", ((HttpWebResponse)e.Response).StatusDescription);
}