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;
             }
         }