Silverlight Rich TextBox

This free Silverlight Rich TextBox is easy to implement on your Silverlight driven website and is also customizable to provide a visual feel suitable for any site design.

To use the Rich TextBox control you will need to add a reference to Liquid.RichText.dll in your project.

How to Use the Rich TextBox Control

To use the Rich TextBox on your Silverlight page:

<UserControl x:Class="RichTextBox.Page"
    Width="400" Height="300">
    <Canvas x:Name="LayoutRoot" Background="White">
        <StackPanel Orientation="Horizontal" Canvas.Left="10" Canvas.Top="20">
            <Button x:Name="makeBold" Width="24" Height="23" Click="MakeBold_Click" Margin="10, 2, 2, 2" ToolTipService.ToolTip="Bold">
                <TextBlock x:Name="boldText" Text="B" FontFamily="Arial" FontSize="14" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" />
            <Button x:Name="makeItalic" Width="24" Height="23" Click="MakeItalic_Click" Margin="2" ToolTipService.ToolTip="Italic">
                <TextBlock x:Name="italicText" Text="I" FontFamily="Arial" FontSize="14" FontStyle="Italic" HorizontalAlignment="Center" VerticalAlignment="Center" />
            <Button x:Name="makeUnderline" Width="24" Height="23" Click="MakeUnderline_Click" Margin="2" ToolTipService.ToolTip="Underline">
                <TextBlock x:Name="underlineText" Text="U" FontFamily="Arial" FontSize="14" TextDecorations="Underline" HorizontalAlignment="Center" VerticalAlignment="Center" />
            <ComboBox x:Name="selectFontFamily" Width="155" Height="23" Margin="10, 2, 2, 2" SelectionChanged="SelectFontFamily_ItemSelected">
                <ComboBoxItem Content="Arial" FontSize="14" FontFamily="Arial" IsSelected="True" />
                <ComboBoxItem Content="Arial Black" FontSize="14" FontFamily="Arial Black" />
                <ComboBoxItem Content="Comic Sans MS" FontSize="14" FontFamily="Comic Sans MS" />
                <ComboBoxItem Content="Courier New" FontSize="14" FontFamily="Courier New" />
                <ComboBoxItem Content="Lucida Grande" FontSize="14" FontFamily="Lucida Grande" />
                <ComboBoxItem Content="Lucida Sans Unicode" FontSize="14" FontFamily="Lucida Sans Unicode" />
                <ComboBoxItem Content="Times New Roman" FontSize="14" FontFamily="Times New Roman" />
                <ComboBoxItem Content="Trebuchet MS" FontSize="14" FontFamily="Trebuchet MS" />
                <ComboBoxItem Content="Verdana" FontSize="14" FontFamily="Verdana" />

            <ComboBox x:Name="selectFontSize" Width="45" Height="23" Margin="2" SelectionChanged="SelectFontSize_ItemSelected">
                <ComboBoxItem Content="8" />
                <ComboBoxItem Content="9" />
                <ComboBoxItem Content="10" IsSelected="True" />
                <ComboBoxItem Content="11" />
                <ComboBoxItem Content="12" />
                <ComboBoxItem Content="14" />
                <ComboBoxItem Content="16" />
                <ComboBoxItem Content="18" />
                <ComboBoxItem Content="20" />
                <ComboBoxItem Content="22" />
                <ComboBoxItem Content="24" />
                <ComboBoxItem Content="26" />
                <ComboBoxItem Content="28" />
                <ComboBoxItem Content="36" />
                <ComboBoxItem Content="48" />
                <ComboBoxItem Content="72" />
        <liquidRichText:RichTextBox x:Name="richTextBox" Canvas.Left="20" Canvas.Top="50" Width="295" Height="200" />

The Rich TextBox can be set to plain text or rich text in the custom format.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using Liquid;
using Liquid.Components;

namespace RichTextBox
    public partial class Page : UserControl
        #region Private Properties

        private SolidColorBrush _buttonFillStyleNotApplied = new SolidColorBrush(Color.FromArgb(255, 0, 0, 0));
        private SolidColorBrush _buttonFillStyleApplied = new SolidColorBrush(Color.FromArgb(255, 255, 0, 0));
        private bool _ignoreFormattingChanges = false;


        public Page()

            richTextBox.Text = "Some plain text.";
            richTextBox.SelectionChanged += new RichTextBoxEventHandler(RichTextBox_SelectionChanged);

        private void RichTextBox_SelectionChanged(object sender, RichTextBoxEventArgs e)

        private void UpdateFormattingControls()
            makeBold.Background = _buttonFillStyleNotApplied;
            makeItalic.Background = _buttonFillStyleNotApplied;
            makeUnderline.Background = _buttonFillStyleNotApplied;

            if (richTextBox.SelectionStyle.Weight == FontWeights.Bold)
                makeBold.Background = _buttonFillStyleApplied;

            if (richTextBox.SelectionStyle.Style == FontStyles.Italic)
                makeItalic.Background = _buttonFillStyleApplied;

            if (richTextBox.SelectionStyle.Decorations == TextDecorations.Underline)
                makeUnderline.Background = _buttonFillStyleApplied;

            SetSelected(selectFontFamily, richTextBox.SelectionStyle.Family);
            SetSelected(selectFontSize, richTextBox.SelectionStyle.Size.ToString());

        private void SetSelected(ComboBox combo, string value)
            if (value != null)
                _ignoreFormattingChanges = true;

                foreach (ComboBoxItem item in combo.Items)
                    if (item.Content.ToString().ToLower() == value.ToLower())
                        combo.SelectedItem = item;

                _ignoreFormattingChanges = false;

        private void MakeBold_Click(object sender, RoutedEventArgs e)
            Formatting format = (makeBold.Background == _buttonFillStyleNotApplied ? Formatting.Bold : Formatting.RemoveBold);

            ExecuteFormatting(format, null);

        private void MakeItalic_Click(object sender, RoutedEventArgs e)
            Formatting format = (makeItalic.Background == _buttonFillStyleNotApplied ? Formatting.Italic : Formatting.RemoveItalic);

            ExecuteFormatting(format, null);

        private void MakeUnderline_Click(object sender, RoutedEventArgs e)
            Formatting format = (makeUnderline.Background == _buttonFillStyleNotApplied ? Formatting.Underline : Formatting.RemoveUnderline);

            ExecuteFormatting(format, null);

        private void SelectFontFamily_ItemSelected(object sender, EventArgs e)
            if (selectFontFamily != null)
                ExecuteFormatting(Formatting.FontFamily, ((ComboBoxItem)selectFontFamily.SelectedItem).Content.ToString());

        private void SelectFontSize_ItemSelected(object sender, EventArgs e)
            if (selectFontSize != null)
                ExecuteFormatting(Formatting.FontSize, double.Parse(((ComboBoxItem)selectFontSize.SelectedItem).Content.ToString()));

        private void ExecuteFormatting(Formatting format, object param)
            if (!_ignoreFormattingChanges)
                richTextBox.ApplyFormatting(format, param);

Example Silverlight Rich TextBox Control:

Silverlight Rich TextBox Control

Further Information

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