Get the content from the rich text box. : RichTextBox « Windows Presentation Foundation « VB.Net






Get the content from the rich text box.

Get the content from the rich text box.
   

<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">
  <Grid>
    <RichTextBox x:Name="rtbTextContent" TextChanged="RichTextBox_TextChanged" />
  </Grid>
</Window>
//File:Window.xaml.vb
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Documents
Imports System.Windows.Media

Namespace WpfApplication1

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

    Private Sub RichTextBox_TextChanged(sender As Object, e As TextChangedEventArgs)

      Dim textRange As New TextRange(rtbTextContent.Document.ContentStart, rtbTextContent.Document.ContentEnd)
      RemoveHandler rtbTextContent.TextChanged, AddressOf RichTextBox_TextChanged
      textRange.ClearAllProperties()
      ApplyFormatting()
      AddHandler rtbTextContent.TextChanged, AddressOf RichTextBox_TextChanged
    End Sub

    Private Sub ApplyFormatting()
      Dim tp As TextPointer = rtbTextContent.Document.ContentStart
      tp = FindNextString(tp)

      Dim textRangeEnd As TextPointer = tp.GetPositionAtOffset(1, LogicalDirection.Forward)

      Dim tokenTextRange As New TextRange(tp, tp.GetPositionAtOffset(1, LogicalDirection.Forward))

      tokenTextRange.ApplyPropertyValue(TextElement.ForegroundProperty, Brushes.Blue)
    End Sub

    Private Function FindNextString(tp As TextPointer) As TextPointer
      Dim buffer As Char() = New Char(0) {}
      tp.GetTextInRun(LogicalDirection.Forward, buffer, 0, 1)
      Return tp
    End Function
  End Class
End Namespace

   
    
    
  








Related examples in the same category

1.Programmatically Insert Text into a RichTextBoxProgrammatically Insert Text into a RichTextBox
2.Get selected text from RichTextBox by using RichTextBox.Selection.TextGet selected text from RichTextBox by using RichTextBox.Selection.Text
3.Get Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffsetGet Caret Position in a RichTextBox by using RichTextBox.CaretPosition.GetPositionAtOffset
4.Add / Remove TextChanged event for RichTextBoxAdd / Remove TextChanged event for RichTextBox
5.Clear any formatting applied to the text with TextRange.ClearAllProperties();Clear any formatting applied to the text with TextRange.ClearAllProperties();
6.Apply Syntax Highlighting in a Text ControlApply Syntax Highlighting in a Text Control
7.Select all text from RichTextBox and cutSelect all text from RichTextBox and cut
8.Use Application Command to edit RichTextBoxUse Application Command to edit RichTextBox
9.Load or Save the Content of a RichTextBoxLoad or Save the Content of a RichTextBox
10.Display a Password Entry Box and get the inputDisplay a Password Entry Box and get the input