Use RadioButton to control TextBox alignment : RadioButton « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » RadioButton 
16.14.6.Use RadioButton to control TextBox alignment
<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="300" Width="300">
    <StackPanel>
        <TextBox AcceptsReturn="True" Height="100" IsReadOnly="True" 
                 Name="textBox1" TextAlignment="Left" TextWrapping="Wrap" 
                 VerticalScrollBarVisibility="Auto">
            Default starting text.
        </TextBox>
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition/>
                <ColumnDefinition/>
                <ColumnDefinition/>
            </Grid.ColumnDefinitions>
            <RadioButton Checked="AlignmentChecked" Grid.Column="0" 
                         HorizontalAlignment="Center" IsChecked="True"
                         Margin="5" Name="leftAlignRadioButton">
                Left</RadioButton>
            <RadioButton Checked="AlignmentChecked" Grid.Column="1" 
                         HorizontalAlignment="Center" Margin="5"
                         Name="centerAlignRadioButton">
                Center</RadioButton>
            <RadioButton Checked="AlignmentChecked" Grid.Column="2" 
                         HorizontalAlignment="Center" Margin="5"
                         Name="rightAlignRadioButton">
                Right</RadioButton>
        </Grid>
    </StackPanel>
</Window>
//File:Window.xaml.vb
Imports System.Windows
Imports System.Windows.Controls

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub
    Private Sub AlignmentChecked(sender As Object, e As RoutedEventArgs)
      Dim button As RadioButton = TryCast(e.OriginalSource, RadioButton)

      If e.OriginalSource Is leftAlignRadioButton Then
        textBox1.TextAlignment = TextAlignment.Left
      ElseIf e.OriginalSource Is centerAlignRadioButton Then
        textBox1.TextAlignment = TextAlignment.Center
      ElseIf e.OriginalSource Is rightAlignRadioButton Then
        textBox1.TextAlignment = TextAlignment.Right
      End If

      textBox1.Focus()
    End Sub
  End Class
End Namespace
WPF Use Radio Button To Control Text Box Alignment
16.14.RadioButton
16.14.1.Grouping radio buttons by parentGrouping radio buttons by parent
16.14.2.Grouping radio buttons by nameGrouping radio buttons by name
16.14.3.CheckRadio GroupCheckRadio Group
16.14.4.Image RadioButtonImage RadioButton
16.14.5.RadioButton click eventRadioButton click event
16.14.6.Use RadioButton to control TextBox alignmentUse RadioButton to control TextBox alignment
16.14.7.RadioButton checked event handlerRadioButton checked event handler
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