转 winfrom组件圆角

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace Gid_1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Draw(Rectangle rectangle, Graphics g, int _radius, bool cusp, Color begin_color, Color end_color)

        {

            int span = ;

            //抗锯齿

            g.SmoothingMode = SmoothingMode.AntiAlias;

            //渐变填充

            LinearGradientBrush myLinearGradientBrush = new LinearGradientBrush(rectangle, begin_color, end_color, LinearGradientMode.Vertical);

            //画尖角

            if (cusp)

            {

                span = ;

                PointF p1 = new PointF(rectangle.Width - , rectangle.Y + );

                PointF p2 = new PointF(rectangle.Width - , rectangle.Y + );

                PointF p3 = new PointF(rectangle.Width, rectangle.Y + );

                PointF[] ptsArray = { p1, p2, p3 };

                g.FillPolygon(myLinearGradientBrush, ptsArray);

            }

            //填充

            g.FillPath(myLinearGradientBrush, DrawRoundRect(rectangle.X, rectangle.Y, rectangle.Width - span, rectangle.Height-, _radius));

        }

        public static GraphicsPath DrawRoundRect(int x, int y, int width, int height, int radius)

        {

            //四边圆角

            GraphicsPath gp = new GraphicsPath();

            gp.AddArc(x, y, radius, radius, , );

            gp.AddArc(width - radius, y, radius, radius, , );

            gp.AddArc(width - radius, height - radius, radius, radius, , );

            gp.AddArc(x, height - radius, radius, radius, , );

            gp.CloseAllFigures();

            return gp;

        }

        private void panel1_Paint(object sender, PaintEventArgs e)

        {

            Draw(e.ClipRectangle, e.Graphics, ,true, Color.FromArgb(, , ), Color.FromArgb(, , ));

            base.OnPaint(e);

            Graphics g = e.Graphics;

            g.DrawString("其实我是个Panel", new Font("微软雅黑", , FontStyle.Regular), new SolidBrush(Color.White), new PointF(, ));

        }

        private void panel2_Paint(object sender, PaintEventArgs e)

        {

            Draw(e.ClipRectangle, e.Graphics, , false, Color.FromArgb(, , ), Color.FromArgb(, , ));

            base.OnPaint(e);

            Graphics g = e.Graphics;

            g.DrawString("其实我是个Panel", new Font("微软雅黑", , FontStyle.Regular), new SolidBrush(Color.White), new PointF(, ));

        }

        private void button1_Paint(object sender, PaintEventArgs e)

        {

            Draw(e.ClipRectangle, e.Graphics, , false, Color.FromArgb(, , ), Color.FromArgb(, , ));

            base.OnPaint(e);

            Graphics g = e.Graphics;

            g.DrawString("其实我是个按钮", new Font("微软雅黑", , FontStyle.Regular), new SolidBrush(Color.White), new PointF(, ));

        }

        private void label1_Paint(object sender, PaintEventArgs e)

        {

            Draw(e.ClipRectangle, e.Graphics, , false, Color.FromArgb(, , ), Color.FromArgb(, , ));

            base.OnPaint(e);

            Graphics g = e.Graphics;

            g.DrawString("其实我是Label", new Font("微软雅黑", , FontStyle.Regular), new SolidBrush(Color.Black), new PointF(, ));

        }

    }

}