How to make a asynchronous web api call from asp.net?

Question

I am trying to implement asynchronous web api call from asp.net

My code is similar like this

var response = httpClient.PostAsJsonAsync("api/apicontroller/execute/", executeModel).Result;

This is working in synchronous mode .

I do not want to wait for my webapi call to complete. How I can implement this using .net framework 4 ?

Answer 1

Change the line to:

var response = await httpClient.PostAsJsonAsync("api/apicontroller/execute/", executeModel);

Checking the Result property makes it synchronous. Also make sure your method signature contains the async keyword.

edit: If you don't want to wait for the result right away, you can postpone the await like this (or never perform it):

var task = httpClient.PostAsJsonAsync("api/apicontroller/execute/", executeModel);
/* Do other stuff in parallell here */
var result = await task;

Answer 2

How I can implement this using .net framework 4?

You can't use async , await , or HttpClient on ASP.NET 4. They all require ASP.NET 4.5 . Your options are to upgrade to ASP.NET 4.5 and use the natural await syntax or to stay on ASP.NET 4 and use something like WebClient .