RichTextBox:使用RichTextBox. selection .start等选项卡内容

本文关键字：RichTextBox 选项 start 使用 selection | 更新日期: 2023-09-27 18:09:23

我想给选定的文本加下划线，但发现下划线继续到下一个选项卡-停止

示例代码

 //rtbList is a richTextBox
        rtbList.AppendText("'t");  
        selStart = rtbList.TextLength;
        rtbList.AppendText("Bought"); 
        rtbList.SelectionStart = selStart;           
        rtbList.SelectionLength = rtbList.TextLength - selStart;
        rtbList.SelectionFont = hdgFont; // bold & underline
        rtbList.AppendText("'t");
        //
        selStart = rtbList.TextLength;
        rtbList.SelectionLength = 0;
        rtbList.AppendText("Maturity");
        rtbList.SelectionStart = selStart;            
        rtbList.SelectionLength = rtbList.TextLength - selStart;
        rtbList.SelectionFont = hdgFontNoUnderline;

是否有办法克服这个问题，或者这是rtf格式的一个基本"缺陷"?

显然，我可以通过使用固定的格式来避免这种情况。"Courier"和构造字符串

RichTextBox:使用RichTextBox. selection .start等选项卡内容

看起来您的selStart发生在AppendText("'t")行之前。您的下划线字体不包括包含制表符的范围。

基本上，任何你附加在下划线字体之后的文本都会得到那个字体，直到你改变它。

rtbList.AppendText("'t");  
selStart = rtbList.TextLength;
rtbList.AppendText("Bought"); 
rtbList.SelectionStart = selStart;           
rtbList.SelectionLength = rtbList.TextLength - selStart;
rtbList.SelectionFont = hdgFont; // bold & underline
//Move before AppendText:
selStart = rtbList.TextLength;
rtbList.AppendText("'t");
rtbList.SelectionLength = 0;
rtbList.AppendText("Maturity");
rtbList.SelectionStart = selStart;            
rtbList.SelectionLength = rtbList.TextLength - selStart;
rtbList.SelectionFont = hdgFontNoUnderline;
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