Don’t Block on Async Code
Source This is a problem that is brought up repeatedly on the forums and Stack Overflow. I think it’s the most-asked question by async newcomers once they’ve learned the basics. UI Example Consider the example below. A button click will initiate a REST call and display the results in a text box (this sample is for Windows Forms, but the same principles apply to any UI application).
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// My "library" method. public static async Task<JObject> GetJsonAsync(Uri uri) { using (var client = new HttpClient()) { var jsonString = await client.GetStringAsync(uri); return JObject.Parse(jsonString); } } // My "top-level" method. public void Button1_Click(...) { var jsonTask = GetJsonAsync(...); textBox1.Text = jsonTask.Result; } |
The “GetJson” helper method takes care of making the actual REST call and parsing…