自定义控件

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;

namespace EditCell
{
    public partial class EditCell : UserControl
    {         
        
        private string txtValue;
        [Description("同步Text属性的设置")]//该描述将会在属性面板中显示
        [DefaultValue("Welcome")]//为属性设置初始值
        public string TxtValue
        {
            get { return txtValue; }
            set 
            {
                txtValue = value;
                txtEdit.Text = value;
                llbResult.Text = value;               
                   
            }
        }

        private ColorValue colorValue1;    
        [DefaultValue(typeof(ColorValue), "Red")]        
        public ColorValue ColorValue1
        {
            get { return colorValue1; }
            set { 
                colorValue1 = value;
                txtEdit.Text = value.ToString() ;
                llbResult.Text = value.ToString();
                 }
        }

        


        public delegate void AsyValueChangeEventHandler(object sender, AsyValueEventEvent e);//自定义事件委托
       public  event AsyValueChangeEventHandler AsyValueChange;

        private void OnAsyValueChange(string text)//当事件发生的时候，出发事件函数
        {
            if (AsyValueChange != null)//如果在主调用中没有为AsyValueChange事件添加处理函数，不做处理
            {
                AsyValueChange(this,new AsyValueEventEvent(text));//调用事件的处理函数
            }

        }




        public EditCell()
        {
            InitializeComponent();
        }

        private void llbResult_Click(object sender, EventArgs e)
        {

        }

        private void txtEdit_TextChanged(object sender, EventArgs e)
        {
            llbResult.Text = txtEdit.Text;
            this.txtValue=txtEdit.Text;
            OnAsyValueChange(this.txtValue);
        }
    }
    public class AsyValueEventEvent : EventArgs//自定义事件,注意用来与主调用做数据传递使用
    {
        private string txtValue;

        public string TxtValue
        {
            get { return txtValue; }
            set { txtValue = value; }
        }
        public AsyValueEventEvent(string value)
            : base()
        {
            this.txtValue = value;
        }

    }
    public enum ColorValue
    {
        Red,
        Green,
        Blue,
        White,
        Black,
        Purple
    }

}