Example of RestSharp ASYNC client.ExecuteAsync<T> () works

Question

Could someone please help me modify the code below:

client.ExecuteAsync(request, response => {
    Console.WriteLine(response.Content);
});

Basically I want to use ExecuteAsync method above but don't want to print but return response.Content to the caller.

Is there any easy way to achieve this?

I tried this but doesnt' work:

    public T Execute<T>(RestRequest request) where T : new()
        {
            var client = new RestClient();
            client.BaseUrl = BaseUrl;
            client.Authenticator = new HttpBasicAuthenticator(_accountSid, _secretKey);
            request.AddParameter("AccountSid", _accountSid, ParameterType.UrlSegment); // used on every request
            var response = client.ExecuteAsync(request, response => {
    return response.data);
});

}

The above code is from https://github.com/restsharp/RestSharp

Answer 1

There's the thing... you can't return an asynchronously delivered value, because your calling method will already have returned. Blocking the caller until you have a result defeats the point of using ExecuteAsync. In this case, I'd return a Task<string> (assuming response.Content is a string):

Task<string> GetResponseContentAsync(...)
{
  var tcs=new TaskCompletionSource<string>();
  client.ExecuteAsync(request, response => {
    tcs.SetResult(response.Content);
  });
  return tcs.Task;
}

Now, when the task completes, you have a value. As we move to c#5 async/await, you should get used to stating asynchrony in terms of Task<T> as it's pretty core.

http://msdn.microsoft.com/en-us/library/dd537609.aspx

http://msdn.microsoft.com/en-us/library/hh191443.aspx