Winforms RichtextBox粗体/斜体/下划线格式问题

2 回答

• 7

  我不得不像你必须那样思考 . 我觉得这是一个老帖子 . 但是，对于那些可能遇到同样问题的人 . 您不能将字体样式，字体系列，...应用于字符串，除非您逐个字符地迭代，因此您可以获得SelectionFont . 这是可以帮助您的方法：

  /// <summary>
      /// Changes a font from originalFont appending other properties
      /// </summary>
      /// <param name="originalFont">Original font of text
      /// <param name="familyName">Target family name
      /// <param name="emSize">Target text Size
      /// <param name="fontStyle">Target font style
      /// <param name="enableFontStyle">true when enable false when disable
      /// <returns>A new font with all provided properties added/removed to original font</returns>
      private Font RenderFont(Font originalFont, string familyName, float? emSize, FontStyle? fontStyle, bool? enableFontStyle)
      {
          if (fontStyle.HasValue && fontStyle != FontStyle.Regular && fontStyle != FontStyle.Bold && fontStyle != FontStyle.Italic && fontStyle != FontStyle.Underline)
              throw new System.InvalidProgramException("Invalid style parameter to ChangeFontStyleForSelectedText");
  
          Font newFont;
          FontStyle? newStyle = null;
          if (fontStyle.HasValue)
          {
              if (fontStyle.HasValue && fontStyle == FontStyle.Regular)
                  newStyle = fontStyle.Value;
              else if (originalFont != null && enableFontStyle.HasValue && enableFontStyle.Value)
                  newStyle = originalFont.Style | fontStyle.Value;
              else
                  newStyle = originalFont.Style & ~fontStyle.Value;
          }
  
          newFont = new Font(!string.IsNullOrEmpty(familyName) ? familyName : originalFont.FontFamily.Name,
                              emSize.HasValue ? emSize.Value : originalFont.Size,
                              newStyle.HasValue ? newStyle.Value : originalFont.Style);
          return newFont;
      }
  

  有关如何创建自定义richtexBox控件的更多详细信息，请转到http://how-to-code-net.blogspot.ro/2014/01/how-to-make-custom-richtextbox-control.html

  回复于 2024-04-28T06:58:20+08:00
• 0

  除非我完全误解了这个问题

  // Get the current text selection or to text entered after the insertion point. 
  // Build new font based on the selection font, make it both Bold and Underline
  // Apply new font to currently selected text (or for new text at insertion point
  
  Font currFont = richTextBox.SelectionFont;
  Font boldUnderFont = new Font(currFont, FontStyle.Bold | FontStyle.Underline);
  richTextBox.SelectionFont = boldUnderFont;
  

  回复于 2024-04-28T06:58:20+08:00