Get Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffset : RichTextBox « Windows Presentation Foundation « VB.Net Tutorial

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VB.Net Tutorial » Windows Presentation Foundation » RichTextBox 
16.17.3.Get Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffset
<Window 
  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" Height="600" Width="800">
  <DockPanel>
    <StackPanel DockPanel.Dock="Bottom" Orientation="Horizontal">
      <TextBox x:Name="tbxInsertionText" Width="200" Margin="5,0" />
      <Button DockPanel.Dock="Bottom" Content="Insert" Click="btnInsert_Click"/>
    </StackPanel>
    <RichTextBox x:Name="rtbTextContent" />
  </DockPanel>
</Window>
//File:Window.xaml.vb
Imports System.Windows
Imports System.Windows.Documents
Imports System.Windows.Input

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub btnInsert_Click(sender As Object, e As RoutedEventArgs)
      If String.IsNullOrEmpty(tbxInsertionText.TextThen
        Return
      End If
      rtbTextContent.BeginChange()
      If rtbTextContent.Selection.Text <> String.Empty Then
        rtbTextContent.Selection.Text = String.Empty
      End If
      Dim tp As TextPointer = rtbTextContent.CaretPosition.GetPositionAtOffset(0, LogicalDirection.Forward)
      rtbTextContent.CaretPosition.InsertTextInRun(tbxInsertionText.Text)
      rtbTextContent.CaretPosition = tp
      rtbTextContent.EndChange()
      Keyboard.Focus(rtbTextContent)
    End Sub
  End Class
End Namespace
WPF Get Caret Position In A Rich Text Box By Using Rich Text Box Caret Position Get Position At Offset
16.17.RichTextBox
16.17.1.Programmatically Insert Text into a RichTextBoxProgrammatically Insert Text into a RichTextBox
16.17.2.Get selected text from RichTextBox by using RichTextBox.Selection.TextGet selected text from RichTextBox by using RichTextBox.Selection.Text
16.17.3.Get Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffsetGet Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffset
16.17.4.Get the content from the rich text box.Get the content from the rich text box.
16.17.5.Add / Remove TextChanged event for RichTextBoxAdd / Remove TextChanged event for RichTextBox
16.17.6.Clear any formatting applied to the text with TextRange.ClearAllProperties();Clear any formatting applied to the text with TextRange.ClearAllProperties();
16.17.7.Apply Syntax Highlighting in a Text ControlApply Syntax Highlighting in a Text Control
16.17.8.Select all text from RichTextBox and cutSelect all text from RichTextBox and cut
16.17.9.Use Application Command to edit RichTextBoxUse Application Command to edit RichTextBox
16.17.10.Load or Save the Content of a RichTextBoxLoad or Save the Content of a RichTextBox
16.17.11.Display a Password Entry Box and get the inputDisplay a Password Entry Box and get the input
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