想重写个OnPaint的函数怎么写??

Question

继承picturebox,然后重载Paint函数。OverRide

Answer 1

public class myPictureBox : System.Windows.Forms.PictureBox
{
public myPictureBox()
{ } protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
base.OnPaint(e);
} }

Answer 2

还是不懂
protected override void OnPaint(PaintEventArgs e)
{
Graphics g= e.Graphics;
g.FillRectangle(Brushes.White,this.ClientRectangle);
GraphicsPath gp=new GraphicsPath();
gp.AddEllipse(20, 20, 300, 200);
gp.AddPie(50, 100, 300, 100, 45, 200);
gp.AddRectangle(new Rectangle(100, 30, 100, 80));
g.DrawPath(Pens.Blue, gp);
g.TranslateTransform(200, 20);
g.FillPath(Brushes.GreenYellow, gp);
gp.Dispose();
}
这个是画在form上的,怎样才能将它画在picturebox上??

Answer 3

你重写System.Windows.Forms.PictureBox就是画在PictureBox上罗
public class myPictureBox : System.Windows.Forms.PictureBox
{...
protected override void OnPaint(PaintEventArgs e)
{...}