接球System.WebClient 500内部服务器错误 [英] Catch 500 internal server error with System.WebClient

问题描述

我有一些代码 DownloadStringAsync 。我布劳尔我能得到有关该错误的一些信息，因为我打开发送错误信息到浏览器中的IIS。我在想，如果有可能赶上它的代码。

I have some code that does DownloadStringAsync. with my brower i can get some information about the error since I turned on send error message to browser in IIS. I was wondering if it's possible to catch it in the code.

void Process( Job job )
{
   using( WebClient client = new WebClient() )
   {
        client.DownloadStringCompleted += (sender, args ) =>
            DownloadStringCompleted(job,args);

        try
        {
            client.DownloadStringAsync(new Uri(job.url), job);
        }
        catch (WebException e)
        {
            Console.WriteLine(e.Message);
        }
   }
}

void DownloadStringCompleted(Job job, DownloadStringCompletedEventArgs args)
{
   if( args.Error != null )
   {
       // How can i get the response ? Like 500 Internal Server Error
       // this_buggy_page.asp Line 100000
   }
}

推荐答案

如果 args.Error！= NULL 它可能会包含一个实例引发WebException ;如果是这样的话，那么你可以将它转换为引发WebException ，然后访问它的响应属性，你可以投到 HttpWebResponse （用于HTTP调用），并从那里你可以得到头/身/等。

If args.Error != null it will likely contain an instance of WebException; if this is the case, then you can cast it to WebException, then access its Response property, which you can cast to HttpWebResponse (for HTTP calls), and from there you can get the headers / body / etc.

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