wpf中的richtext使用方法

winform中的richtextbox比较熟悉

选择文本 richtextboxselection start richtextboxselection end

然后就是设置字体，richtextbox.selectionfont selectionbackcolor之类的

那么在wpf当中怎么设置richtextbox的字体呢

TextRange textRange = new TextRange(
            // TextPointer to the start of content in the RichTextBox.
            richtext_claim.Document.ContentStart,
            // TextPointer to the end of content in the RichTextBox.
             richtext_claim.Document.ContentEnd
            );

            //textRange.ApplyPropertyValue(TextElement.BackgroundProperty, "yellow");
            textRange.ApplyPropertyValue(TextElement.BackgroundProperty, "yellow");
            textRange.ApplyPropertyValue(Run.TextDecorationsProperty, TextDecorations.Underline);

其中具体的属性可以参考如下具体的代码

//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);
    }

}