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





Binding Command to ApplicationCommands.New

Binding Command to ApplicationCommands.New
 

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="CommandHandling" Height="300" Width="300"
    >
    <DockPanel>
      <Menu DockPanel.Dock="Top">
        <MenuItem Header="_File">
          <MenuItem Command="New" />
        </MenuItem>
      </Menu>
      <TextBox x:Name="inputBox" TextChanged="OnTextboxTextChanged" />
    </DockPanel>
</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 WpfApplication1
{
    public partial class Window1 : Window
    {
        bool unsavedChanges = false;
        
        public Window1()
        {
            InitializeComponent();

            CommandBinding cmdBindingNew = new CommandBinding(ApplicationCommands.New);
            cmdBindingNew.Executed += NewCommandHandler;
            CommandBindings.Add(cmdBindingNew);
        }

        void NewCommandHandler(object sender, ExecutedRoutedEventArgs e)
        {
            if (unsavedChanges)
            {
                MessageBoxResult result = MessageBox.Show(this,"Save changes to existing document?", "New",MessageBoxButton.YesNoCancel);

                if (result == MessageBoxResult.Cancel){
                    return;
                }
                if (result == MessageBoxResult.Yes){
                    SaveChanges();
                }
            }
            inputBox.Clear();
        }
        private void OnTextboxTextChanged(object sender, RoutedEventArgs e){
            unsavedChanges = true;
            Console.WriteLine("changed");
        }

        private void SaveChanges(){
            unsavedChanges = false;
            Console.WriteLine("saved");
        }

    }
}

   
  










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2.Assign ApplicationCommands.Open to ButtonAssign ApplicationCommands.Open to Button
3.Binding command to ApplicationCommands.RedoBinding command to ApplicationCommands.Redo
4.Bind CanExecute to ApplicationCommands.SaveBind CanExecute to ApplicationCommands.Save
5.Binding ApplicationCommands.New Command to your own handlerBinding ApplicationCommands.New Command to your own handler
6.Change ApplicationCommands.New.TextChange ApplicationCommands.New.Text
7.Call ApplicationCommands.New.Execute to execute the command directlyCall ApplicationCommands.New.Execute to execute the command directly
8.Use CommandBinding to bind ApplicationCommands.New in codeUse CommandBinding to bind ApplicationCommands.New in code
9.Use CommandBinding to Bind to ApplicationCommandsUse CommandBinding to Bind to ApplicationCommands
10.Add ApplicationCommands.Cut to TextBox with TextBox.CommandBindingsAdd ApplicationCommands.Cut to TextBox with TextBox.CommandBindings