C#全屏随机位置显示图片的小程序

想法：将屏幕截图作为程序背景图，在之上弹出提示窗口，选择确定后进行定时图片随机位置显示。（支持ESC键退出）

• 需要添加的控件：Timer

• 需要修改的Form1属性为下图红色区域：

• 资源文件的添加：添加->新建项->资源文件

• ESC键退出程序：

在Form1.Designer.cs中增加

this.KeyDown += Form1_KeyDown;

• 代码如下：

           Rectangle bounds = Screen.GetBounds(Screen.GetBounds(Point.Empty));
  
           public Form1()
           {
               this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
               this.BackgroundImage = GetNoCursor();
               InitializeComponent();
           }
  
           private void Form1_Load(object sender, EventArgs e)
           {
               timer1.Interval = ;
               if (MessageBox.Show("消息", "标题", MessageBoxButtons.YesNo) == DialogResult.Yes)
               {
                   timer1.Enabled = true;
               }
               else
               {
                   this.Close();
               }
           }
  
           private void Form1_KeyDown(object sender, KeyEventArgs e)
           {
               if (e.KeyData == Keys.Escape)
               {
                   timer1.Enabled = false;
                   MessageBox.Show("消息", "标题", MessageBoxButtons.OK);
                   this.Close();
               }
           }
  
           private Bitmap GetNoCursor()
           {
               Bitmap Source = new Bitmap(bounds.Width, bounds.Height);    //根据屏幕大小创建Bitmap对象
               Graphics g = Graphics.FromImage(Source);
               g.CopyFromScreen(, , , , Source.Size);  //获取没有鼠标的屏幕截图
               g.Dispose();    //释放资源
               return Source;
           }
  
           private void timer1_Tick(object sender, EventArgs e)
           {
               Image img = Resource1.Image1;//获取用于显示的资源文件
               if (img != null)
               {
                   Graphics g = this.CreateGraphics();
                   Random rd = new Random();
                   int picXPoint = rd.Next(, bounds.Right - img.Width);
                   int picYPoint = rd.Next(, bounds.Height - img.Height);
                   Point ulCorner = new Point(picXPoint, picYPoint);
                   g.DrawImageUnscaled(img, ulCorner);
               }
               else
               {
                   timer1.Enabled = false;
                   MessageBox.Show("没有图片，感谢使用");
                   this.Close();
               }
           }