TextBox TextChanged event : TextBox Event « Windows Presentation Foundation « VB.Net Tutorial






<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.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 Commands
  Public Partial Class TwoDocument
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub SaveCommand(sender As Object, e As ExecutedRoutedEventArgs)
    End Sub
    Private Sub txt_TextChanged(sender As Object, e As RoutedEventArgs)
    End Sub
    Private Sub SaveCommand_CanExecute(sender As Object, e As CanExecuteRoutedEventArgs)
      e.CanExecute = False
    End Sub
  End Class
End Namespace
WPF Text Box Text Changed Event








16.5.TextBox Event
16.5.1.Provide Keyboard Access to Text BoxesProvide Keyboard Access to Text Boxes
16.5.2.TextBox PreviewTextInputTextBox PreviewTextInput
16.5.3.TextBox text changed eventTextBox text changed event
16.5.4.TextBox TextChanged eventTextBox TextChanged event
16.5.5.TextBox PreviewKeyDownTextBox PreviewKeyDown
16.5.6.TextBox KeyDownTextBox KeyDown
16.5.7.TextBox PreviewKeyUpTextBox PreviewKeyUp
16.5.8.TextBox KeyUpTextBox KeyUp
16.5.9.TextBox TextInputTextBox TextInput