c# - CallMethodAction binding to Button fails -

there no errors. trying learn mvvm. setup simple. no output when clicking on button. xaml should ok since have produced interactions part in blend dragging behavior button. note: intention use methods, not command, since commands cover click, not example doubleclick.

<window x:class="mvvm_1.mainwindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions" xmlns:i="clr-namespace:system.windows.interactivity;assembly=system.windows.interactivity" xmlns:local="clr-namespace:mvvm_1" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" title="mainwindow" width="525" height="350" mc:ignorable="d"  > <window.datacontext>     <local:viewmodel/> </window.datacontext> <grid>     <button  x:name="button"         width="75"         margin="198,168,0,0"         horizontalalignment="left"         verticalalignment="top"         content="testmethod">         <i:interaction.triggers>             <i:eventtrigger eventname="mouseleftbuttondown" sourcename="button">                 <ei:callmethodaction methodname="methodtesting"                                       targetobject="{binding}"/>             </i:eventtrigger>         </i:interaction.triggers>     </button> </grid> 

using system.windows;  namespace mvvm_1 { public class viewmodel      {      public static void methodtesting()         {             messagebox.show("success!");         }     } } 

you need use command bind control click event.

mvvm - commands, relaycommands , eventtocommand

instead of:

public static void methodtesting()   {     messagebox.show("success!"); } 

use this example:

public icommand buttonclickcommand  {     { return new delegatecommand<object>(functocall, functoevaluate);} }  private void functocall(object context) {     //this called when button clicked     messagebox.show("success!"); }  private bool functoevaluate(object context) {     //this called evaluate whether functocall can called     //for example can return true or false based on validation logic     return true; } 

also under how create onclick command in wpf mvvm programmatically created button? - is great example.