调用Web API

Question

I am trying to call a web api and I want to see what response I get. WOuld it be 200, 204 or 500.

I am trying it fot thr first time.

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");

            }
        }

Here, the code stops on the last line. How can I do that ?

Answer 1

You can use the StatusCode property of your HttpResponseMessage.

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 is the official documentation of HttpStatusCode enumeration which gives you a complete list of possible status code values.

Since your method returns a Task, you should await it when you call it.

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