asyncworkerasyncoperation.html

---
layout: documentation 
title: EvaluationEngine 
teaser: Decouple business logic from control flow
navigation:
   - name: Overview
     link: asyncworker.html 
   - name: Execute asynchronous operation
     link: asyncworkerasyncoperation.html
   - name: Execute code on completion
     link: asyncworkercompletion.html
   - name: Exception Handling
     link: asyncworkerexceptionhandling.html
   - name: Cancel asynchronous operation
     link: asyncworkercancel.html
   - name: Use progress
     link: asyncworkerprogress.html
   - name: Testability
     link: asyncworkertestability.html
---
<h2>Execute Asynchronous Operation</h2>
<p>
Instantiate an async worker and call <code>RunWorkerAsync</code> to start execution of the worker delegate on a background thread.
</p>

<h3>Simple Async Operation</h3>
<script type="syntaxhighlighter" class="brush: csharp"><![CDATA[
DoWorkEventHandler worker = delegate
{
    // take your time to do something because you will not block anyone...
};

AsyncWorker asyncWorker = new AsyncWorker(worker);

asyncWorker.RunWorkerAsync();
]]></script>

<h3>Async Operation with Arguments</h3>
<script type="syntaxhighlighter" class="brush: csharp"><![CDATA[
DoWorkEventHandler worker = delegate(object sender, DoWorkEventArgs e)
{
    // do something with the argument 
	//(unfortunately not type safe - please blame .net and not me)
    string argument = (string)e.Argument;
};

AsyncWorker asyncWorker = new AsyncWorker(worker);

asyncWorker.RunWorkerAsync("hello world");
]]></script>