RichTextBox.Selection Property
Gets the TextSelection in the RichTextBox.
Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)
Property Value
Type: System.Windows.Documents.TextSelectionA TextSelection that represents the selected text in the RichTextBox.
The following example shows how you can apply bold, italic, and underline formatting to the selected text.
<!--Create a RichTextBox and three buttons.--> <StackPanel> <RichTextBox x:Name="MyRTB" Width="600" Height="400" /> <StackPanel Orientation="Horizontal" HorizontalAlignment="Center"> <Button Content="Bold" Height="30" Margin="2" Width="50" Click="BtnBold_Click" /> <Button Content="Italic" Height="30" Margin="2" Width="50" Click="BtnItalic_Click" /> <Button Content="Underline" Height="30" Margin="2" Width="65" Click="BtnUnderline_Click" /> </StackPanel> </StackPanel>
//Set Bold formatting to selected content private void BtnBold_Click(object sender, RoutedEventArgs e) { if (MyRTB != null) { if (MyRTB.Selection.GetPropertyValue(Run.FontWeightProperty) is FontWeight && ((FontWeight)MyRTB.Selection.GetPropertyValue(Run.FontWeightProperty)) == FontWeights.Normal) MyRTB.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Bold); else MyRTB.Selection.ApplyPropertyValue(Run.FontWeightProperty, FontWeights.Normal); } } //<SnippetItalic> //Set Italic formatting to selected content private void BtnItalic_Click(object sender, RoutedEventArgs e) { if (MyRTB != null) { if (MyRTB.Selection.GetPropertyValue(Run.FontStyleProperty) is FontStyle && ((FontStyle)MyRTB.Selection.GetPropertyValue(Run.FontStyleProperty)) == FontStyles.Normal) MyRTB.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Italic); else MyRTB.Selection.ApplyPropertyValue(Run.FontStyleProperty, FontStyles.Normal); } } //Set Underline formatting to selected content private void BtnUnderline_Click(object sender, RoutedEventArgs e) { if (MyRTB != null) { if (MyRTB.Selection.GetPropertyValue(Run.TextDecorationsProperty) == null) MyRTB.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline); else MyRTB.Selection.ApplyPropertyValue(Run.TextDecorationsProperty, null); } }
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
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