FrameAreaImage control

最近在项目中，需要把一个中空的图片放大绘制（图片如下），而不失真。

 
试了picture congtrol，但是失真。最终我用customize control解决了问题。

代码里面见真相。

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

    public partial class FrameAreaImage : Control
    {
        #region [ Private Members... ]
        private int ConerLength = 40;
        private int FrameImageEdgeLength = 30;
        #endregion
        #region [ Constructors / Destructors... ]
        public FrameAreaImage()
        {
            InitializeComponent();
        }
        #endregion
        #region [ Accessors / Manipulators... ]
        public Bitmap Image
        {
            get;
            set;
        }

        public int FrameShadowSize
        {
            get;
            set;
        }
        #endregion
        #region [ Overrides... ]

        protected override void OnPaint(PaintEventArgs e)
        {
            Graphics g = e.Graphics;

            if (Image != null)
            {
                //////////////////////////////////////////////////////////////////////////
                // Draw the Corner
                //////////////////////////////////////////////////////////////////////////
                var image = Image.Clone(new Rectangle(0, 0, ConerLength, ConerLength),
                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                // TopLeft
                g.DrawImage(image, 0, 0, ConerLength, ConerLength);
                image.Dispose();


                // Left Bottom
                image = Image.Clone(new Rectangle(0, Image.Height - ConerLength, ConerLength, ConerLength),
                                    System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                g.DrawImage(image, new Point(1, this.Height - ConerLength));
                image.Dispose();

                // Right Bottom
                image = Image.Clone(new Rectangle(Image.Width - ConerLength, Image.Height - ConerLength, ConerLength, ConerLength),
                                    System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                g.DrawImage(image, new Point(this.Width - ConerLength, this.Height - ConerLength));
                image.Dispose();

                // Top Right
                image = Image.Clone(new Rectangle(Image.Width - ConerLength, 0, ConerLength, ConerLength),
                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                g.DrawImage(image, new Point(this.Width - ConerLength, 0));
                image.Dispose();

                //////////////////////////////////////////////////////////////////////////
                // Draw the Edge Shadow
                //////////////////////////////////////////////////////////////////////////

                // Left
                image = Image.Clone(new Rectangle(0, ConerLength, FrameShadowSize, FrameImageEdgeLength),
                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                TextureBrush tBrush = new TextureBrush(image);
                tBrush.WrapMode = WrapMode.TileFlipY;
                g.FillRectangle(tBrush, new Rectangle(0, ConerLength, FrameShadowSize, this.Height - 2 * ConerLength));
                image.Dispose();
                tBrush.Dispose();

                // Bottom
                g.DrawImage(Image.Clone(new Rectangle(FrameImageEdgeLength, Image.Height - FrameShadowSize, FrameImageEdgeLength, FrameShadowSize),
                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb),
                                        ConerLength - 2, this.Height - FrameShadowSize - 1, this.Width - 2 * ConerLength + ConerLength / 2, FrameShadowSize);


                   g.DrawImage(Image.Clone(new Rectangle(Image.Width - FrameShadowSize, ConerLength, FrameShadowSize, FrameImageEdgeLength),
                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb),
                                        this.Width - FrameShadowSize - 1, ConerLength - 2, FrameShadowSize, this.Height - 2 * ConerLength + ConerLength / 2);

                // Top
                g.DrawImage(Image.Clone(new Rectangle(FrameImageEdgeLength, 0, FrameImageEdgeLength, FrameShadowSize),
                            System.Drawing.Imaging.PixelFormat.Format32bppArgb),
                            ConerLength, 0, this.Width - 2 * ConerLength + FrameShadowSize, FrameShadowSize);
            }

            base.OnPaint(e);
        }
        #endregion
    }