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POHow to run a function on a background thread for Windows Phone 7?
 

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  1. POHow to run a function on a background thread for Windows Phone 7?
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    <p>I'm using MVVM Light to build a WP7 (Windows Phone 7) application. I wish to have all the work performed by the Model to be run on a background thread. Then, when the work is done, raise an event so that the ViewModel can process the data.</p> <p>I have already found out that I cannot invoke a Delegate asynchronously from an WP7 app. </p> <p>Currently I am trying to use ThreadPool.QueueUserWorkItem() to run some code on a background thread and use MVVM Light's DispatcherHelper.CheckBeginInvodeOnUI() to raise an event on the UI thread to signal the ViewModel that the data has been loaded (this crashes VS2010 and Blend 4 when they try to display a design-time view).</p> <p>Is there any sample code to run some code on a background thread and then dispatch an event back to the UI thread for a WP7 app?</p> <p>Thanks in advance, Jeff.</p> <p>Edit - Here is a sample Model</p> <pre><code>public class DataModel { public event EventHandler&lt;DataLoadingEventArgs&gt; DataLoadingComplete; public event EventHandler&lt;DataLoadingErrorEventArgs&gt; DataLoadingError; List&lt;Data&gt; _dataCasch = new List&lt;Data&gt;(); public void GetData() { ThreadPool.QueueUserWorkItem(func =&gt; { try { LoadData(); if (DataLoadingComplete != null) { //Dispatch complete event back to the UI thread DispatcherHelper.CheckBeginInvokeOnUI(() =&gt; { //raise event DataLoadingComplete(this, new DataLoadingEventArgs(_dataCasch)); }); } } catch (Exception ex) { if (DataLoadingError != null) { //Dispatch error event back to the UI thread DispatcherHelper.CheckBeginInvokeOnUI(() =&gt; { //raise error DataLoadingError(this, new DataLoadingErrorEventArgs(ex)); }); } } }); } private void LoadData() { //Do work to load data.... } } </code></pre>
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