C# 使用PictureBox控件--点击切换图片

效果：

1.

2.

代码：

        private Boolean fals = true;

        /// <summary>
        /// 单击事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pictureBox3_Click(object sender, EventArgs e)
        {
            if (fals == true)
            {
                this.pictureBox3.BackgroundImage = Image.FromFile(Application.StartupPath + "\image\" + "stop.ico");
                fals = false;
            }
            else
            {
                this.pictureBox3.BackgroundImage = Image.FromFile(Application.StartupPath + "\image\" + "start.ico");
                fals = true;
            }
        }