winfrom 圓角panel

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首先後台添加命名空間

using System.Drawing.Drawing2D;

後台代碼

namespace Report.Web{    public partial class RoundPanel : Panel    {        private int mMatrixRound = 8;//圓角大小預設值        private Color mBack;        //重新定義背景顏色        public Color Back        {            get { return mBack; }            set            {                if (value == null)                {                    mBack = Control.DefaultBackColor;                }                else                {                    mBack = value;                }                base.Refresh();            }        }        /// <summary>圓角弧度(0為不要圓角)</summary>                  [Browsable(true)]          //顯示到屬性欄         [Description("圓角弧度(0為不要圓角)")]//屬性欄 顯示的注釋        public int MatrixRound        {            get { return mMatrixRound; }            set            {                mMatrixRound = value;                base.Refresh();            }        }        private GraphicsPath CreateRound(Rectangle rect, int radius)        {            GraphicsPath roundRect = new GraphicsPath();            //頂端             roundRect.AddLine(rect.Left + radius - 1, rect.Top - 1, rect.Right - radius, rect.Top - 1);            //右上方             roundRect.AddArc(rect.Right - radius, rect.Top - 1, radius, radius, 270, 90);            //右邊             roundRect.AddLine(rect.Right, rect.Top + radius, rect.Right, rect.Bottom - radius);            //右下角            roundRect.AddArc(rect.Right - radius, rect.Bottom - radius, radius, radius, 0, 90);            //底邊             roundRect.AddLine(rect.Right - radius, rect.Bottom, rect.Left + radius, rect.Bottom);            //左下角             roundRect.AddArc(rect.Left - 1, rect.Bottom - radius, radius, radius, 90, 90);            //左邊             roundRect.AddLine(rect.Left - 1, rect.Top + radius, rect.Left - 1, rect.Bottom - radius);            //左上方             roundRect.AddArc(rect.Left - 1, rect.Top - 1, radius, radius, 180, 90);            return roundRect;        }         protected override void OnPaint(PaintEventArgs pe)        {            int width = base.Width - base.Margin.Left - base.Margin.Right;            int height = base.Height - base.Margin.Top - base.Margin.Bottom;            Rectangle rec = new Rectangle(base.Margin.Left, base.Margin.Top, width, height);            GraphicsPath round = CreateRound(rec, mMatrixRound);            pe.Graphics.SmoothingMode = SmoothingMode.AntiAlias;            pe.Graphics.FillPath((Brush)(new SolidBrush(mBack)), round);         }        protected override void OnResize(EventArgs eventargs)        {            base.Refresh();        }     }}

 

註：以上資訊我也是通過查資料然後總結的。