C# 从 HttpResponseMessage 获取内容/消息
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Getting content/message from HttpResponseMessage
提问by Clem
I'm trying to get content of HttpResponseMessage. It should be: {"message":"Action '' does not exist!","success":false}, but I don't know, how to get it out of HttpResponseMessage.
我正在尝试获取 HttpResponseMessage 的内容。它应该是：{"message":"Action '' does not exist!","success":false}，但我不知道，如何从 HttpResponseMessage 中获取它。
HttpClient httpClient = new HttpClient();
HttpResponseMessage response = await httpClient.GetAsync("http://****?action=");
txtBlock.Text = Convert.ToString(response); //wrong!
In this case txtBlock would have value:
在这种情况下 txtBlock 将具有价值：
StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
Vary: Accept-Encoding
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Date: Wed, 10 Apr 2013 20:46:37 GMT
Server: Apache/2.2.16
Server: (Debian)
X-Powered-By: PHP/5.3.3-7+squeeze14
Content-Length: 55
Content-Type: text/html
}
采纳答案by Icemanind
You need to call GetResponse().
您需要调用GetResponse()。
Stream receiveStream = response.GetResponseStream ();
StreamReader readStream = new StreamReader (receiveStream, Encoding.UTF8);
txtBlock.Text = readStream.ReadToEnd();
回答by MCurbelo
Try this, you can create an extension method like this:
试试这个，你可以创建一个这样的扩展方法：
public static string ContentToString(this HttpContent httpContent)
{
var readAsStringAsync = httpContent.ReadAsStringAsync();
return readAsStringAsync.Result;
}
and then, simple call the extension method:
然后，简单地调用扩展方法：
txtBlock.Text = response.Content.ContentToString();
I hope this help you ;-)
我希望这对你有帮助;-)
回答by rudivonstaden
I think the easiest approach is just to change the last line to
我认为最简单的方法就是将最后一行更改为
txtBlock.Text = await response.Content.ReadAsStringAsync(); //right!
This way you don't need to introduce any stream readers and you don't need any extension methods.
这样你就不需要引入任何流阅读器，也不需要任何扩展方法。
回答by Hinrich
You can use the GetStringAsyncmethod:
您可以使用以下GetStringAsync方法：
var uri = new Uri("http://yoururlhere");
var response = await client.GetStringAsync(uri);
回答by taras-mytofir
If you want to cast it to specific type (e.g. within tests) you can use ReadAsAsyncextension method:
如果您想将其转换为特定类型（例如在测试中），您可以使用ReadAsAsync扩展方法：
object yourTypeInstance = await response.Content.ReadAsAsync(typeof(YourType));
or following for synchronous code:
或以下同步代码：
object yourTypeInstance = response.Content.ReadAsAsync(typeof(YourType)).Result;
Update: there is also generic option of ReadAsAsync<>which returns specific type instance instead of object-declared one:
更新：还有ReadAsAsync<> 的通用选项，它返回特定类型的实例而不是对象声明的实例：
YourType yourTypeInstance = await response.Content.ReadAsAsync<YourType>();
回答by stanimirsp
By the answer of rudivonstaden
由 rudivonstaden 的回答
`txtBlock.Text = await response.Content.ReadAsStringAsync();`
but if you don't want to make the method async you can use
但如果你不想使方法异步，你可以使用
`txtBlock.Text = response.Content.ReadAsStringAsync();
txtBlock.Text.Wait();`
Wait() it's important, becаuse we are doing async operations and we must wait for the task to complete before going ahead.
Wait() 很重要，因为我们正在执行异步操作，我们必须等待任务完成才能继续。
回答by snr
I think the following image helps for those needing to come by Tas the return type.
我认为下图对那些需要T作为返回类型的人有帮助。
回答by benhorgen
The quick answer I suggest is:
我建议的快速答案是：
response.Result.Content.ReadAsStringAsync().Result
response.Result.Content.ReadAsStringAsync().Result
