在C#的Picturebox上畫線畫圓, 以下是相關介紹:
可先參考 Graphics 成員
實作(注意*那行Graphics objGraphic = e.Graphics;):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | private void pictureBox1_Paint(object sender, PaintEventArgs e){ int picBoxWidth = pictureBox1.Size.Width; int picBoxHeight = pictureBox1.Size.Height; int halfWidth = pictureBox1.Size.Width / 2; int halfHeight = pictureBox1.Size.Height / 2; Graphics objGraphic = e.Graphics; //**請注意這一行** Pen pen = new Pen(Color.Black); int b = 2; int m = 2; for (int x = 0; x < 426; x++) { int y = m * x + b; x = (y - b) / m; objGraphic.DrawLine(pen, x, y, -x, -y); System.Drawing.Drawing2D.GraphicsState graph = objGraphic.Save(); objGraphic.Restore(graph); } objGraphic.DrawLine(pen, 0, halfHeight, picBoxWidth, halfHeight); objGraphic.DrawLine(pen, halfWidth, 0, halfWidth, picBoxHeight); objGraphic.DrawLine(pen, 20, 20, 300, 300);} |
資料來源 http://trufflepenne.blogspot.com/2010/11/cpicturebox.html
