使用

private void button1_Click(object sender, EventArgs e) {RichTextBoxCtrl.richTextBoxFontClass r = new RichTextBoxCtrl.richTextBoxFontClass();r.richTextBox = richTextBox1;r.ToggleBold(); }

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows.Forms; using System.Drawing;////使用 //RichTextBoxCtrl.richTextBoxFontClass r = new RichTextBoxCtrl.richTextBoxFontClass(); //r.richTextBox = richTextBox1; //r.ToggleBold();namespace RichTextBoxCtrl {class richTextBoxFontClass{public richTextBoxFontClass(){richTextBox = new RichTextBox();}public RichTextBox richTextBox;//粗體public void ToggleBold(){if (richTextBox.SelectionFont == null)richTextBox.SelectionFont = richTextBox.Font;FontStyle style = richTextBox.SelectionFont.Style;if (richTextBox.SelectionFont.Bold)style &= ~FontStyle.Bold;//恢復正常elsestyle |= FontStyle.Bold;richTextBox.SelectionFont = new Font(richTextBox.SelectionFont, style);}//斜體public void ToggleItalic(){if (richTextBox.SelectionFont == null)richTextBox.SelectionFont = richTextBox.Font;FontStyle style = richTextBox.SelectionFont.Style;if (richTextBox.SelectionFont.Italic)style &= ~FontStyle.Italic;//恢復正常elsestyle |= FontStyle.Italic;richTextBox.SelectionFont = new Font(richTextBox.SelectionFont, style);}//下劃線public void ToggleUnderLine(){if (richTextBox.SelectionFont == null)richTextBox.SelectionFont = richTextBox.Font;FontStyle style = richTextBox.SelectionFont.Style;if (richTextBox.SelectionFont.Underline)style &= ~FontStyle.Underline;//恢復正常elsestyle |= FontStyle.Underline;richTextBox.SelectionFont = new Font(richTextBox.SelectionFont, style);}//刪除線public void ToggleStrikeout(){if (richTextBox.SelectionFont == null)richTextBox.SelectionFont = richTextBox.Font;FontStyle style = richTextBox.SelectionFont.Style;if (richTextBox.SelectionFont.Strikeout)style &= ~FontStyle.Strikeout;//恢復正常elsestyle |= FontStyle.Strikeout;richTextBox.SelectionFont = new Font(richTextBox.SelectionFont, style);}} }

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轉載于:https://www.cnblogs.com/xe2011/p/3446119.html

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