//將0~9數字圖片保存在Image數組中 
private Image[] image = new Bitmap[10]; 
public Form1() 
{ 
    InitializeComponent(); 
    for (int i = 0; i < 10;i++ ) 
    { 
 image[i] = new Bitmap(@"D:/編程/C#/數字時鐘/數字時鐘/Resources/"+i.ToString()+".jpg"); 
    } 
} 

private void Form1_Paint(object sender, PaintEventArgs e) 
{ 
    Graphics g = e.Graphics; 
 
    int hh = DateTime.Now.Hour;                       //取得小時數字 
    int hh1 = hh / 10; 
    int hh2 = hh % 10; 
    g.DrawImage(image[hh1], 20, 20, 80, 180); 
    g.DrawImage(image[hh2], 100, 20, 80, 180); 
 
    int mm = DateTime.Now.Minute;                      //取得分鐘數字 
    int mm1 = mm / 10; 
    int mm2 = mm % 10; 
    g.DrawImage(image[mm1], 260, 20, 80, 180); 
    g.DrawImage(image[mm2], 340, 20, 80, 180); 
 
    int ss = DateTime.Now.Second;                       //取得秒數字 
    int ss1 = ss / 10; 
    int ss2 = ss % 10; 
    g.DrawImage(image[ss1], 500, 20, 80, 180); 
    g.DrawImage(image[ss2], 580, 20, 80, 180); 
} 
 
private void timer1_Tick(object sender, EventArgs e)  //對窗體進行重繪 
{ 
    this.Invalidate(); 
}