如何让自定义控件属性值更改后，值立即显示到界面上 Invalidate()

在自定义控件（复合控件)后，有些属性想立即显示到界面上，而不是编译之后才能，显示到界面上，这个时候，应该在控件属性的set操作里面添加相应的函数处理。

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 MyControl

{
    public partial class ColorForGridControl : UserControl
    {
        public ColorForGridControl()
        {
            InitializeComponent();
            DisplayText = "已成交";
        }

        private string displayText;

        public string DisplayText
        {
            get { return displayText; }
            set
            {
                displayText = value;
                this.lblDisplayText.Text = DisplayText;
                this.Invalidate();
            }
        }
        private Color color;

        public Color Color
        {
            get { return color; }
            set
            {
                color = value;
                this.pnlColor.BackColor = Color;
                this.lblDisplayText.ForeColor = Color;
                this.Invalidate();
            }
        }
        private void ColorForGridControl_Load(object sender, EventArgs e)
        {
            if (Color == Color.Empty)
                Color = Color.Green;
            if (DisplayText == string.Empty)
                DisplayText = "已成交";
            this.pnlColor.BackColor = Color;
            this.lblDisplayText.ForeColor = Color;
            this.lblDisplayText.Text = DisplayText;
        }
    }
}