Binding ApplicationCommands.New Command to your own handler

 
<Window x:Class="Commands.TestNewCommand"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TestNewCommand" Height="150" Width="300">
  <Window.CommandBindings>
    <CommandBinding Command="ApplicationCommands.New" Executed="NewCommand" />
  </Window.CommandBindings>

  <StackPanel >
    <Menu>
      <MenuItem Header="File">
        <MenuItem Command="New"></MenuItem>
      </MenuItem>
    </Menu>

    <Button Margin="5" Padding="5" Command="ApplicationCommands.New" ToolTip="{x:Static ApplicationCommands.New}">New</Button>
    <Button Margin="5" Padding="5" Visibility="Hidden" Command="ApplicationCommands.Open">Open (unwired)</Button>
    <Button Margin="5" Padding="5" Visibility="Hidden" Click="cmdDoCommand_Click" >DoCommand</Button>
    </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace Commands
{
    public partial class TestNewCommand : System.Windows.Window
    {
        public TestNewCommand()
        {
            InitializeComponent();
        }
        private void NewCommand(object sender, ExecutedRoutedEventArgs e)
        {            
            MessageBox.Show("New command triggered by " + e.Source.ToString());
        }
        private void cmdDoCommand_Click(object sender, RoutedEventArgs e)
        {
            this.CommandBindings[0].Command.Execute(null);
        }
    }
}

1.	Bind ApplicationCommand to a handler
2.	Assign ApplicationCommands.Open to Button
3.	Binding command to ApplicationCommands.Redo
4.	Binding Command to ApplicationCommands.New
5.	Bind CanExecute to ApplicationCommands.Save
6.	Change ApplicationCommands.New.Text
7.	Call ApplicationCommands.New.Execute to execute the command directly
8.	Use CommandBinding to bind ApplicationCommands.New in code
9.	Use CommandBinding to Bind to ApplicationCommands
10.	Add ApplicationCommands.Cut to TextBox with TextBox.CommandBindings

Binding ApplicationCommands.New Command to your own handler : ApplicationCommand « Windows Presentation Foundation « C# / C Sharp

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