Looking for a good sample of the threading in WPF

Question

Looking for a good sample of the threading in WPF.
Which common way to realize the threading in WPF?

Thanks!

Answer 1

Threading is pretty much the same as any .NET application, except when you need to update the UI from a thread other than the UI thread, you must use the Dispatcher.Invoke/BeginInvoke methods.

 

I like using the Dispatcher with anonymous methods as it makes my class a little cleaner.

 

/* In a non-ui thread */

int x = 100;

 

myProgressBar.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal, (ThreadStart) delegate

{

/* In the UI thread */

myProgressBar.Value = x;

});

 

 

Answer 2

Nick Kramer and Tyler Barton has written a comprehensive article on WPF's threading model, this is the best article I've found on WPF threading:

http://blogs.msdn.com/nickkramer/attachment/553378.ashx

Hope this helps

Answer 3

Hello,

Here is my simple example of Threading in WPF. Hope this helps.
The Appendix C in Programming WPF is very hlepful topic about Threading in WPF.

public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void btnStartThread_Click(object sender, RoutedEventArgs e)
        {
            System.Threading.Thread worker = new System.Threading.Thread(DoWork);
            worker.IsBackground = true; // set as background thread so that it is terminated with application.
            worker.Start();
        }

        private void DoWork()
        {
            ulong sum = 0;
            for(int i=0; i < short.MaxValue;i++)
            {
                //we need to call Disptacher.Invoke to reflect UI within worker thread.
                Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,
                        (Action)delegate
                        { this.Title = sum.ToString(); }
            );
                sum += (ulong)i;
            }

            //Show the result of calcualtion when done.
            Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Normal,
                        (Action)delegate
                        { MessageBox.Show("Sum = " + sum); }
            );
        }
    }

Answer 4

Gracias Nyi Nyi Thann!

That's what I need!

Answer 5

HI DmitryBoyko,

If my code is what u need, pls mark as answer. thx.

Answer 6