Bind CanExecute to ApplicationCommands.Save : ApplicationCommand « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. ApplicationCommand

<Window x:Class="Commands.TwoDocument"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TwoDocument" Height="300" Width="300">

  <Window.Resources>
    <CommandBinding x:Key="binding" Command="ApplicationCommands.Save" Executed="SaveCommand" CanExecute="SaveCommand_CanExecute" />
  </Window.Resources>

  <Grid>
    <Grid.RowDefinitions>
      <RowDefinition Height="Auto"></RowDefinition>
      <RowDefinition Height="Auto"></RowDefinition>
      <RowDefinition></RowDefinition>
      <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>
    <Menu Grid.Row="0">
      <MenuItem Header="File">
        <MenuItem Command="New"></MenuItem>
        <MenuItem Command="Open"></MenuItem>
        <MenuItem Command="Save"></MenuItem>
        <MenuItem Command="SaveAs"></MenuItem>
        <Separator></Separator>
        <MenuItem Command="Close"></MenuItem>
      </MenuItem>
    </Menu>

    <TextBox Margin="5" Grid.Row="2" TextWrapping="Wrap" AcceptsReturn="True" TextChanged="txt_TextChanged">
      <TextBox.CommandBindings>
        <StaticResource ResourceKey="binding"></StaticResource>
      </TextBox.CommandBindings>
    </TextBox>

  </Grid>
</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 TwoDocument : System.Windows.Window
    {
        public TwoDocument()
        {
            InitializeComponent();
        }

        private void SaveCommand(object sender, ExecutedRoutedEventArgs e)
        {            
        }
        private void txt_TextChanged(object sender, RoutedEventArgs e)
        {
        }
        private void SaveCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
        {
            e.CanExecute = false;
        }
    }
}

24.137.ApplicationCommand
	24.137.1.	Bind ApplicationCommand to a handler
	24.137.2.	Assign ApplicationCommands.Open to Button
	24.137.3.	Binding command to ApplicationCommands.Redo
	24.137.4.	Binding Command to ApplicationCommands.New
	24.137.5.	Bind CanExecute to ApplicationCommands.Save
	24.137.6.	Binding ApplicationCommands.New Command to your own handler
	24.137.7.	Change ApplicationCommands.New.Text
	24.137.8.	Call ApplicationCommands.New.Execute to execute the command directly
	24.137.9.	Use CommandBinding to bind ApplicationCommands.New in code
	24.137.10.	Use CommandBinding to Bind to ApplicationCommands
	24.137.11.	Add ApplicationCommands.Cut to TextBox with TextBox.CommandBindings