Bind TextBlock to TextBox : TextBox « Windows Presentation Foundation « C# / CSharp Tutorial

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

<Window x:Class="FontViewer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Teach Yourself WPF: Font Viewer"
        Height="480"
        Width="640">
    <DockPanel Margin="8">

        <ListBox x:Name="FontList"
                 DockPanel.Dock="Left"
                 ItemsSource="{x:Static Fonts.SystemFontFamilies}"
                 Width="160" />
        <TextBox x:Name="SampleText"
                 DockPanel.Dock="Bottom"
                 MinLines="4"
                 Margin="8 0"
                 TextWrapping="Wrap">
            <TextBox.ToolTip>
                <TextBlock>
                    <Italic Foreground="Red">Instructions: </Italic> Type here to change the preview text.
                </TextBlock>
            </TextBox.ToolTip>
            The quick brown fox jumps over the lazy dog.
        </TextBox>
        <StackPanel Margin="8 0 8 8">
            <TextBlock Text="{Binding ElementName=SampleText, Path=Text}"
                       FontFamily="{Binding ElementName=FontList,Path=SelectedItem}"
                       FontSize="10"
                       TextWrapping="Wrap"
                       Margin="0 0 0 4" />
            <TextBlock Text="{Binding ElementName=SampleText, Path=Text}"
                       FontFamily="{Binding ElementName=FontList,Path=SelectedItem}"
                       FontSize="16"
                       TextWrapping="Wrap"
                       Margin="0 0 0 4" />
            <TextBlock Text="{Binding ElementName=SampleText, Path=Text}"
                       FontFamily="{Binding ElementName=FontList,Path=SelectedItem}"
                       FontSize="24"
                       TextWrapping="Wrap"
                       Margin="0 0 0 4" />
            <TextBlock Text="{Binding ElementName=SampleText, Path=Text}"
                       FontFamily="{Binding ElementName=FontList,Path=SelectedItem}"
                       FontSize="32"
                       TextWrapping="Wrap" />
        </StackPanel>
    </DockPanel>
</Window>

24.13.TextBox
	24.13.1.	Bind TextBlock to TextBox
	24.13.2.	Assign your own class to DataContent and bind to TextBox
	24.13.3.	TextBox: set text, select all, clear, prepend, insert, append, cut, paste, undo
	24.13.4.	Set TextBox to editable
	24.13.5.	Scroll TextBox
	24.13.6.	Use Dictionary to record which textbox has been changed and not saved
	24.13.7.	Set TextBox ContextMenu to null
	24.13.8.	TextBox Selection start, end and selected text
	24.13.9.	Scrollable TextBox Column
	24.13.10.	Check Spelling Error