wpf的富文本编辑器

以下是一个使用WPF中的RichTextBox控件自定义的文本编辑器的例子，具备文本字体、字体大小、颜色、背景色、加粗、斜线等基本功能：

<Window x:Class="WpfRichTextBoxDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="WPF RichTextBox Demo" Height="350" Width="525">
    <Grid>
        <RichTextBox x:Name="rtbEditor" Margin="10" VerticalScrollBarVisibility="Auto">
            <RichTextBox.ContextMenu>
                <ContextMenu>
                    <MenuItem Header="Cut" Command="ApplicationCommands.Cut"/>
                    <MenuItem Header="Copy" Command="ApplicationCommands.Copy"/>
                    <MenuItem Header="Paste" Command="ApplicationCommands.Paste"/>
                    <Separator/>
                    <MenuItem Header="Bold" Command="Bold"/>
                    <MenuItem Header="Italic" Command="Italic"/>
                    <MenuItem Header="Underline" Command="Underline"/>
                    <Separator/>
                    <MenuItem Header="Font Family">
                        <MenuItem Header="Arial" Command="FontFamily" CommandParameter="Arial"/>
                        <MenuItem Header="Courier New" Command="FontFamily" CommandParameter="Courier New"/>
                        <MenuItem Header="Times New Roman" Command="FontFamily" CommandParameter="Times New Roman"/>
                    </MenuItem>
                    <MenuItem Header="Font Size">
                        <MenuItem Header="8" Command="FontSize" CommandParameter="8"/>
                        <MenuItem Header="12" Command="FontSize" CommandParameter="12"/>
                        <MenuItem Header="16" Command="FontSize" CommandParameter="16"/>
                        <MenuItem Header="20" Command="FontSize" CommandParameter="20"/>
                        <MenuItem Header="24" Command="FontSize" CommandParameter="24"/>
                    </MenuItem>
                    <Separator/>
                    <MenuItem Header="Font Color">
                        <MenuItem Header="Black" Command="TextColor" CommandParameter="Black"/>
                        <MenuItem Header="Red" Command="TextColor" CommandParameter="Red"/>
                        <MenuItem Header="Green" Command="TextColor" CommandParameter="Green"/>
                        <MenuItem Header="Blue" Command="TextColor" CommandParameter="Blue"/>
                    </MenuItem>
                    <MenuItem Header="Background Color">
                        <MenuItem Header="White" Command="TextBackground" CommandParameter="White"/>
                        <MenuItem Header="Yellow" Command="TextBackground" CommandParameter="Yellow"/>
                        <MenuItem Header="LightGray" Command="TextBackground" CommandParameter="LightGray"/>
                        <MenuItem Header="LightBlue" Command="TextBackground" CommandParameter="LightBlue"/>
                    </MenuItem>
                </ContextMenu>
            </RichTextBox.ContextMenu>
        </RichTextBox>
    </Grid>
</Window>