需要帮助撤消字体更改和应用组合字体 [英] need help on undoing the font change and applying combo font

问题描述

代码有效，但如果我再次点击按钮，我就无法撤消应用的字体



到目前为止我的代码

the code works but i cant undo the applied font if i click the button again

heres my code so far

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnbold_Click(object sender, EventArgs e)
        {

            bool bclicked = false;

            if (bclicked == false)
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Bold);
            }
            else
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Regular);
            }
        }

        private void btnunderline_Click(object sender, EventArgs e)
        {
            bool uclicked = false;

            if (uclicked == false)
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Underline);
            }
            else
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Regular);
            }


        }
        
        private void btnitalic_Click(object sender, EventArgs e)
        {
            bool iclicked = false;

            if (iclicked == false)
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Italic);
            }
            else
            {
                txtmessage.Font = new Font(this.Font, FontStyle.Regular);
            }
        }

        private void txtmessage_TextChanged(object sender, EventArgs e)
        {
 

        }
    }
}

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