在Silverlight中,如何在主调度线程上调用操作?

在UserControl类上使用Dispatcher属性。

private void UpdateStatus()
{
  this.Dispatcher.BeginInvoke( delegate { StatusLabel.Text = "Updated"; });
}

    private void UpdateStatus()
    {
       // check if we not in main thread
       if(!this.Dispatcher.CheckAccess())
       {
          // call same method in main thread
          this.Dispatcher.BeginInvoke( UpdateStatus );
          return;
       }

       // in main thread now
       StatusLabel.Text = "Updated";
    }