C#全屏隨機位置顯示圖片的小程序，
想法：將屏幕截圖作為程序背景圖，在之上彈出提示窗口，選擇確定後進行定時圖片隨機位置顯示。（支持ESC鍵退出）
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1 Rectangle bounds = Screen.GetBounds(Screen.GetBounds(Point.Empty));
2
3 public Form1()
4 {
5 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
6 this.BackgroundImage = GetNoCursor();
7 InitializeComponent();
8 }
9
10 private void Form1_Load(object sender, EventArgs e)
11 {
12 timer1.Interval = 500;
13 if (MessageBox.Show("消息", "標題", MessageBoxButtons.YesNo) == DialogResult.Yes)
14 {
15 timer1.Enabled = true;
16 }
17 else
18 {
19 this.Close();
20 }
21 }
22
23 private void Form1_KeyDown(object sender, KeyEventArgs e)
24 {
25 if (e.KeyData == Keys.Escape)
26 {
27 timer1.Enabled = false;
28 MessageBox.Show("消息", "標題", MessageBoxButtons.OK);
29 this.Close();
30 }
31 }
32
33 private Bitmap GetNoCursor()
34 {
35 Bitmap Source = new Bitmap(bounds.Width, bounds.Height); //根據屏幕大小創建Bitmap對象
36 Graphics g = Graphics.FromImage(Source);
37 g.CopyFromScreen(0, 0, 0, 0, Source.Size); //獲取沒有鼠標的屏幕截圖
38 g.Dispose(); //釋放資源
39 return Source;
40 }
41
42 private void timer1_Tick(object sender, EventArgs e)
43 {
44 Image img = Resource1.Image1;//獲取用於顯示的資源文件
45 if (img != null)
46 {
47 Graphics g = this.CreateGraphics();
48 Random rd = new Random();
49 int picXPoint = rd.Next(0, bounds.Right - img.Width);
50 int picYPoint = rd.Next(0, bounds.Height - img.Height);
51 Point ulCorner = new Point(picXPoint, picYPoint);
52 g.DrawImageUnscaled(img, ulCorner);
53 }
54 else
55 {
56 timer1.Enabled = false;
57 MessageBox.Show("沒有圖片，感謝使用");
58 this.Close();
59 }
60 }
