How can i make a button for Bold a selected text in Textbox/Richtextbox in WPF?

Question

I need to make a Button for bolding selected text of a string in TextBox / RichTextBox , but I don't know how to do it with code behind.

TextBox1.SelectedText = new FontStyle("Bold")

It is not working.

Answer 1

试试这个富文本框的代码：

RichTextBox1.Selection.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);