c gdic# GDI画矩形

c# GDI画矩形

绘图代码需要放在Picturebox的Paint事件里完成，使用的绘图对象应该是事件参数里的Graphics. PictureBox pbx = new PictureBox(); pbx.Paint += new PaintEventHandler(pbx_Paint); void pbx_Paint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; g.DrawRectangle(new Pen(Color.Red, 2.0f), new Rectangle(10, 10, 300, 300)); }