winform窗體圓角的兩種方法

 

第一種：

public void SetWindowRegion()
{
      System.Drawing.Drawing2D.GraphicsPath FormPath;
      FormPath = new System.Drawing.Drawing2D.GraphicsPath();
      Rectangle rect = new Rectangle(0, 0, this.Width, this.Height - 0);//this.Left-10,this.Top-10,this.Width-10,this.Height-10);                    
      FormPath = GetRoundedRectPath(rect, 10);
      this.Region = new Region(FormPath);
}

第二種：

private GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)
{
            int diameter = radius;
            Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
            GraphicsPath path = new GraphicsPath();    //   左上角       
            path.AddArc(arcRect, 180, 90);    //   右上角       
            arcRect.X = rect.Right - diameter;
            path.AddArc(arcRect, 270, 90);    //   右下角       
            arcRect.Y = rect.Bottom - diameter;
            path.AddArc(arcRect, 0, 90);    //   左下角       
            arcRect.X = rect.Left;
            path.AddArc(arcRect, 90, 90);
            path.CloseFigure();
            return path;
}