使用 WebClient 和 C#，即使响应是 (400) 错误请求，我如何获取返回的数据? [英] Using a WebClient and C#, how do I get returned data even when the response is (400) Bad Request?

问题描述

我正在使用 Google Translate API 并尝试捕获在我收到 错误.(仅供参考:我知道 API 密钥是错误的，我只是在测试这个).

I am using the Google Translate API and am trying to capture the data returned when I get an error. (FYI: I know the API Key is wrong, I am just testing this).

问题在于，正如您通过单击链接所看到的那样，浏览器会显示错误信息，但 C# 会引发 WebException 并且我似乎无法获取响应数据.

The issue is that the browser, as you can see by clicking the link, displays the error info, but C# throws a WebException and I can't seem to get the response data.

这是我的代码:

string url = "https://www.googleapis.com/language/translate/v2?key=INSERT-YOUR-KEY&source=en&target=de&q=Hello%20world";
WebClient clnt = new WebClient();

//Get string response
try
{
    strResponse = clnt.DownloadString(url);
    System.Diagnostics.Debug.Print(strResponse);
}
catch (Exception ex)
{
    System.Windows.Forms.MessageBox.Show(ex.Message);
    return null;
}

即使响应是 (400) 错误请求(或任何其他与此相关的错误响应)，我如何获得返回的 JSON 错误?除了 WebClient 之外，我是否需要使用不同的类?

How do I get the JSON error returned even when the response is a (400) Bad Request (or any other error resonse for that matter)? Do I need to use different classes other than a WebClient?

推荐答案

这可能对你有帮助

catch ( WebException exception )
{
   string responseText;

   using(var reader = new StreamReader(exception.Response.GetResponseStream()))
   {
     responseText = reader.ReadToEnd();
   }
}

这将为您提供 json 文本，然后您可以使用您喜欢的任何方法从 JSON 转换.

That will get you the json text, that you can then convert from JSON using whichever method you prefer.

检索自:以字符串形式获取 WebClient 错误

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