btn控件

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

namespace ImageControls
{
    public partial class ButtonEx : Control
    {
        public ButtonEx()
        {
            InitializeComponent();
        }
        
        /// <summary>
        /// 控件初始化
        /// </summary>
        private void InitializeComponent()
        {
            _BorderColor = Color.Black;
            _FillColor = Color.Red;
        }

        #region 字段

        private Color _BorderColor;
        private Color _FillColor;

        #endregion
        
        #region 控件属性

        [DefaultValue("Black"), Description("边框颜色"), Category("Appearance")]
        public Color BorderColor
        {
            get
            {
                // Insert code here.
                return _BorderColor;
            }
            set
            {
                _BorderColor = value;
                this.Invalidate();
            }
        }

        [DefaultValue("Red"), Description("填充颜色"), Category("Appearance")]
        public Color FillColor 
        {
            get
            {
                return _FillColor;
            }
            set
            {
                _FillColor = value;
                this.Invalidate();
            }
        }
      

        #endregion
        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
            DrawCircle(pe, 1, _FillColor);
        }

        /// <summary>
        /// 如果x为0表示空心圆，如果为1表示实心圆
        /// </summary>
        /// <param name="pe"></param>
        /// <param name="x"></param>
        private void DrawCircle(PaintEventArgs pe,int x,Color brucolor)
        {
            //定义刷子，用于填充圆的颜色
            Brush brsh = new SolidBrush(brucolor);
            //定义笔
            Brush penbrsh = new SolidBrush(_BorderColor);
            Pen pen = new Pen(penbrsh,2);
            //定义矩形
            Rectangle rec = new Rectangle();
            rec.X = 7;
            rec.Y = 7;
            rec.Width = this.Width - 15;
            rec.Height = this.Height - 15;

            if (x == 0)
                pe.Graphics.DrawEllipse(pen, rec);  //画空心，黑边框的圆
            else
            {

                //画实心，黑边框的圆
                pe.Graphics.FillEllipse(brsh, rec);
                pe.Graphics.DrawEllipse(pen, rec);

            }
        }

        private System.ComponentModel.Container components = null;

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                    components.Dispose();
            }
            base.Dispose(disposing);
        }

    }
}

做硬件测试软件，做了个点击变换颜色的控件