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Dispatcher object in silverlight




Introduction





Application execution







Elaboration




<Grid x:Name="LayoutRoot" Background="White">
  <TextBlock x:Name="SampleBlock"></TextBlock>
</Grid>




BackgroundWorker _BackgroundWorker = new BackgroundWorker();
_BackgroundWorker.DoWork += new DoWorkEventHandler(_BackgroundWorker_DoWork);
_BackgroundWorker.RunWorkerAsync();

void _BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
//  Doing some time consuming task
}






void _BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
       //  Doing some time consuming task
       SampleBlock.Text = "Test Content";
}







Solution





Syntax


this.Dispatcher.BeginInvoke(Delegate d, params Object[] args);



Elaboration




private delegate void AddTextDelegate();
void _BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
            //  Doing some time consuming task            
            this.Dispatcher.BeginInvoke(new AddTextDelegate(ChangeText));            
}

private void ChangeText()
{
            SampleBlock.Text = "Test Content";
}







Summary





Posted By  -  Karan Gupta
 
Posted On  -  Tuesday, December 27, 2011

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