richTextBox设置选中的字体属性

 

执行一次设置选中的字体样式 再执行一次恢复正常

 

 

//粗体

public void ToggleBold()

{


    if (richTextBox1.SelectionFont == null)

        richTextBox1.SelectionFont = richTextBox1.Font;



    FontStyle style = richTextBox1.SelectionFont.Style;



    if (richTextBox1.SelectionFont.Bold)



        style &= ~FontStyle.Bold;//恢复正常

    else

        style |= FontStyle.Bold;



    richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

}

 

斜体

public void ToggleItalic()

{

    if (richTextBox1.SelectionFont == null)

        richTextBox1.SelectionFont = richTextBox1.Font;



    FontStyle style = richTextBox1.SelectionFont.Style;



    if (richTextBox1.SelectionFont.Italic)

        style &= ~FontStyle.Italic;//恢复正常

    else

        style |= FontStyle.Italic;



    richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

}

下划线

public void ToggleUnderLine()

{

    if (richTextBox1.SelectionFont == null)

        richTextBox1.SelectionFont = richTextBox1.Font;



    FontStyle style = richTextBox1.SelectionFont.Style;



    if (richTextBox1.SelectionFont.Underline)

        style &= ~FontStyle.Underline;//恢复正常

    else

        style |= FontStyle.Underline;



    richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, style);

}