WPF RichTextBox 以块的派生类进行显示 使用继承自System.Windows.Documents.Block以获取块状显示方式 示例 整个行 t.Document.Blocks.Add(new BlockUIContainer(new TextBlock() { Text = "AADAA", Foreground = Brushes.Red })); 示例 长度为内容长度 t.Document.Blocks.Add(new Paragraph(new InlineUIContainer(new TextBlock() { Text = "Auto" })));