Asp.net mvc web api async request result

Question

I have a web api controller action that sends a request to another server and gets an image.

public class MyController : ApiController
{ 
   public async Runner<HttpResponseMessage> Wms()
   {
       return await Run();                                    
   }

   private Task<HttpResponseMessage> Run()
   {
       HttpRequestMessage requestMessage = new HttpRequestMessage();
       requestMessage.RequestUri = "http://....";

       foreach (var header in this.Request.Headers)
          requestMessage.Headers.Add(header.Key, header.Value);

        return requestMessage.SendAsync();
   }
}

How can I get async request result of requestMessage.SendAsync()

Yuval Itzchakov · Accepted Answer · 2015-06-16 11:52:27Z

1

You'll need to add the async modifier to the method and await SendAsync():

private async Task<HttpResponseMessage> RunAsync()
{
   HttpRequestMessage requestMessage = new HttpRequestMessage();
   requestMessage.RequestUri = "http://....";

   foreach (var header in this.Request.Headers)
      requestMessage.Headers.Add(header.Key, header.Value);

   HttpResponseMessage response = await requestMessage.SendAsync();
   string resultData = await response.Content.ReadAsStringAsync();
}

Or if you want the response inside Wms, you can await that.

edited Jun 16, 2015 at 11:52

answered Jun 16, 2015 at 11:42

Yuval Itzchakov

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2 Comments

barteloma Over a year ago

var response = await requestMessage.SendAsync(); response has not a propert named Result. So how can I get image result in it?

Yuval Itzchakov Over a year ago

You're looking for var result = await response.Content.ReadAsStringAsync(); or ReadAsStreamAsync(), whichever you want.

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