Binding Command to ApplicationCommands.New : ApplicationCommands « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » ApplicationCommands 
16.93.6.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.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes


Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Private unsavedChanges As Boolean = False

    Public Sub New()
      InitializeComponent()

      Dim cmdBindingNew As New CommandBinding(ApplicationCommands.[New])
      AddHandler cmdBindingNew.Executed, AddressOf NewCommandHandler
      CommandBindings.Add(cmdBindingNew)
    End Sub

    Private Sub NewCommandHandler(sender As Object, e As ExecutedRoutedEventArgs)
      If unsavedChanges Then
        Dim result As MessageBoxResult = MessageBox.Show(Me, "Save changes to existing document?""New", MessageBoxButton.YesNoCancel)

        If result = MessageBoxResult.Cancel Then
          Return
        End If
        If result = MessageBoxResult.Yes Then
          SaveChanges()
        End If
      End If
      inputBox.Clear()
    End Sub
    Private Sub OnTextboxTextChanged(sender As Object, e As RoutedEventArgs)
      unsavedChanges = True
      Console.WriteLine("changed")
    End Sub

    Private Sub SaveChanges()
      unsavedChanges = False
      Console.WriteLine("saved")
    End Sub

  End Class
End Namespace
WPF Binding Command To Application Commands New
16.93.ApplicationCommands
16.93.1.Without focus scopeWithout focus scope
16.93.2.Bind ApplicationCommand to a handlerBind ApplicationCommand to a handler
16.93.3.Assign ApplicationCommands.Open to ButtonAssign ApplicationCommands.Open to Button
16.93.4.Menu with Application command: cut, copy, pasteMenu with Application command: cut, copy, paste
16.93.5.Binding command to ApplicationCommands.RedoBinding command to ApplicationCommands.Redo
16.93.6.Binding Command to ApplicationCommands.NewBinding Command to ApplicationCommands.New
16.93.7.Bind CanExecute to ApplicationCommands.SaveBind CanExecute to ApplicationCommands.Save
16.93.8.Binding ApplicationCommands.New Command to your own handlerBinding ApplicationCommands.New Command to your own handler
16.93.9.Change ApplicationCommands.New.TextChange ApplicationCommands.New.Text
16.93.10.Call ApplicationCommands.New.Execute to execute the command directlyCall ApplicationCommands.New.Execute to execute the command directly
16.93.11.Use CommandBinding to bind ApplicationCommands.New in codeUse CommandBinding to bind ApplicationCommands.New in code
16.93.12.Use CommandBinding to Bind to ApplicationCommandsUse CommandBinding to Bind to ApplicationCommands
16.93.13.Add ApplicationCommands.Cut to TextBox with TextBox.CommandBindingsAdd ApplicationCommands.Cut to TextBox with TextBox.CommandBindings
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