C # WPF uses delegates to modify UI controls

In recent times, in the self-study of WPF, is a completely ignorant of the WPF novice, for the thread to modify the UI control using a delegate to make a record, to self-query also give the necessary reference:

The interface has only one RichTextBox, starting two threads on the form, calling two functions, writing the current time every 1 seconds

One interface XAML is as follows:

<window x:class="Wpfapplication1.mainwindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="Http://schemas.microsoft.com/winfx/2006/xaml"Title="MainWindow"height=" -"Width="525"windowstartuplocation="Centerscreen"Loaded="window_loaded"> <Grid> <ScrollViewer> <richtextbox horizontalalignment="Stretch"margin=" A"Name="RichTextBox1"Verticalalignment="Stretch"/> </ScrollViewer> </Grid></Window>

Two open two threads when the interface is started:

1         Private voidWindow_Loaded (Objectsender, RoutedEventArgs e)2         {3             //Create thread 14Thread T1 =NewThread (NewThreadStart (T1));5 t1. Start ();6 7             //Create thread 28Thread t2 =NewThread (NewThreadStart (T2));9 T2. Start ();Ten}

Three-thread call function:

        /// <summary>        ///Thread 1 Call function///Add by/// </summary>        Private voidT1 () { while(true) {Thread.Sleep (Timespan.fromseconds (1)); ShowMsg (string. Format ("T1 {0}", System.DateTime.Now.ToString ("YYYY-MM-DD hh:mm:ss:fff"))); }        }        /// <summary>        ///Thread 2 Call function///Add by/// </summary>        Private voidT2 () { while(true) {Thread.Sleep (Timespan.fromseconds (1)); ShowMsg (string. Format ("T2 {0}", System.DateTime.Now.ToString ("YYYY-MM-DD hh:mm:ss:fff"))); }        }

Three-write front-end functions:

        Private void ShowMsg (string  sMsg)        {            this. Dispatcher.begininvoke (Dispatcherpriority.normal, (ThreadStart)delegate() {                Richtextbox1.appendtext (string. Format ("{0} \ r \ n", SMSG));}            );        

C # WPF uses delegates to modify UI controls