Question

我正在尝试调用web api，我希望看到我得到的回复。它是200,204或500。

我第一次尝试它。

public void foo()
{
  RunAsync(); // dont know what it return type will be
}


static async Task RunAsync()
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri("http://localhost:9000/");
                client.DefaultRequestHeaders.Accept.Clear();
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                HttpResponseMessage response = await client.GetAsync("pid=23&lang=en-us");

            }
        }

这里，代码在最后一行停止。我怎么能这样做？

Answer 1

您可以使用HttpResponseMessage的StatusCode属性。

HttpResponseMessage response = await client.GetAsync("pid=23&lang=en-us");
if (response.IsSuccessStatusCode)
{
    //was success
    var result = await response.Content.ReadAsStringAsync();     
    //checck result string now
   //you can also deserialize the response to your custom type if needed.
}
else
{
  var statusCode = response.StatusCode;
  //do something with this
}

Here是HttpStatusCode枚举的官方文档，它为您提供了可能的状态代码值的完整列表。

由于您的方法返回一个Task，您应该在调用它时等待它。

public async Task foo()
{    
   await RunAsync(); 
}

调用Web API

1 个答案: