C# 使用 HttpClient.GetAsync() 时如何确定 404 响应状态
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How to determine a 404 response status when using the HttpClient.GetAsync()
提问by Gga
I am trying to determine the responsereturned by HttpClient's GetAsyncmethod in the case of 404 errors using C# and .NET 4.5.
我想，以确定response由归国HttpClient的GetAsync使用C＃和.NET 4.5的404错误的情况下，方法。
At present I can only tell that an error has occurred rather than the error's status such as 404 or timeout.
目前我只能判断发生了错误，而不能判断错误的状态，例如 404 或超时。
Currently my code my code looks like this:
目前我的代码我的代码如下所示：
static void Main(string[] args)
{
dotest("http://error.123");
Console.ReadLine();
}
static async void dotest(string url)
{
HttpClient client = new HttpClient();
HttpResponseMessage response = new HttpResponseMessage();
try
{
response = await client.GetAsync(url);
if (response.IsSuccessStatusCode)
{
Console.WriteLine(response.StatusCode.ToString());
}
else
{
// problems handling here
string msg = response.IsSuccessStatusCode.ToString();
throw new Exception(msg);
}
}
catch (Exception e)
{
// .. and understanding the error here
Console.WriteLine( e.ToString() );
}
}
My problem is that I am unable to handle the exception and determine its status and other details of what went wrong.
我的问题是我无法处理异常并确定其状态和其他出错细节。
How would I properly handle the exception and interpret what errors occurred?
我将如何正确处理异常并解释发生了什么错误？
采纳答案by Darin Dimitrov
You could simply check the StatusCodeproperty of the response:
您可以简单地检查StatusCode响应的属性：
static async void dotest(string url)
{
using (HttpClient client = new HttpClient())
{
HttpResponseMessage response = await client.GetAsync(url);
if (response.IsSuccessStatusCode)
{
Console.WriteLine(response.StatusCode.ToString());
}
else
{
// problems handling here
Console.WriteLine(
"Error occurred, the status code is: {0}",
response.StatusCode
);
}
}
}
