C# winfrom下绘制圆角窗体

一、这是一个绘制圆角窗体的静态类：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

namespace WindowsFormsApplication2
{
    public static class RoundFormDraw
    {
        public static void Paint(this object sender, PaintEventArgs e)
        {
            Form form = ((Form)sender);
            List<Point> list = new List<Point>();
            int width = form.Width;
            int height = form.Height;
            //左上
            list.Add(new Point(0, 5));
            list.Add(new Point(1, 5));
            list.Add(new Point(1, 3));
            list.Add(new Point(2, 3));
            list.Add(new Point(2, 2));
            list.Add(new Point(3, 2));
            list.Add(new Point(3, 1));
            list.Add(new Point(5, 1));
            list.Add(new Point(5, 0));
            //右上
            list.Add(new Point(width - 5, 0));
            list.Add(new Point(width - 5, 1));
            list.Add(new Point(width - 3, 1));
            list.Add(new Point(width - 3, 2));
            list.Add(new Point(width - 2, 2));
            list.Add(new Point(width - 2, 3));
            list.Add(new Point(width - 1, 3));
            list.Add(new Point(width - 1, 5));
            list.Add(new Point(width - 0, 5));
            //右下
            list.Add(new Point(width - 0, height - 5));
            list.Add(new Point(width - 1, height - 5));
            list.Add(new Point(width - 1, height - 3));
            list.Add(new Point(width - 2, height - 3));
            list.Add(new Point(width - 2, height - 2));
            list.Add(new Point(width - 3, height - 2));
            list.Add(new Point(width - 3, height - 1));
            list.Add(new Point(width - 5, height - 1));
            list.Add(new Point(width - 5, height - 0));
            //左下
            list.Add(new Point(5, height - 0));
            list.Add(new Point(5, height - 1));
            list.Add(new Point(3, height - 1));
            list.Add(new Point(3, height - 2));
            list.Add(new Point(2, height - 2));
            list.Add(new Point(2, height - 3));
            list.Add(new Point(1, height - 3));
            list.Add(new Point(1, height - 5));
            list.Add(new Point(0, height - 5));
            Point[] points = list.ToArray();
            GraphicsPath shape = new GraphicsPath();
            shape.AddPolygon(points);
            //将窗体的显示区域设为GraphicsPath的实例 
            form.Region = new System.Drawing.Region(shape);
        }
    }
}

 

二、使用方法：

1.将窗体的FormBorderStyle属性设置为none

2.在窗体的Paint事件中添加如下代码

RoundFormDraw.Paint(sender,e);

RoundFormDraw就是上面的类