WinForm自定义控件（颜色设置控件）

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 SelfColorControl
{
    public partial class ColorControl : UserControl
    {
        public ColorControl()
        {
            InitializeComponent();
            this.Size = this.panelColor.Size;
        }

        private void SetPanelColor()
        {
            int r = Convert.ToInt32(this.textBoxRed.Text.ToString());
            int g = Convert.ToInt32(this.textBoxGreen.Text.ToString());
            int b = Convert.ToInt32(this.textBoxBlue.Text.ToString());
            this.panelColor.BackColor = Color.FromArgb(r, g, b);
        }

        #region Property

        //当前颜色值
        [Description("当前颜色值"), DefaultValue(0), Category("Data")]
        public Color CurValue
        {
            get { return this.panelColor.BackColor; }
            set
            {
                this.panelColor.BackColor = value;
                //改变控件值
                this.textBoxRed.Text = value.R.ToString();
                this.textBoxGreen.Text = value.G.ToString();
                this.textBoxBlue.Text = value.B.ToString();
                this.trackBarRed.Value = Convert.ToInt32(value.R.ToString());
                this.trackBarGreen.Value = Convert.ToInt32(value.G.ToString());
                this.trackBarBlue.Value = Convert.ToInt32(value.B.ToString());
            }
        }

        #endregion

        #region Event

        public delegate void ColorValueChangedHandler(object sender, EventArgs e);
        [Description("颜色值变化"), Category("Mouse")]
        public event ColorValueChangedHandler ValueChanged;

        #endregion

        private void trackBarRed_ValueChanged(object sender, EventArgs e)
        {
            this.textBoxRed.Text = this.trackBarRed.Value.ToString();
            SetPanelColor();
            if (null != ValueChanged)
            {
                ValueChanged(sender, e);
            }
        }

        private void trackBarGreen_ValueChanged(object sender, EventArgs e)
        {
            this.textBoxGreen.Text = this.trackBarGreen.Value.ToString();
            SetPanelColor();
            if (null != ValueChanged)
            {
                ValueChanged(sender, e);
            }
        }

        private void trackBarBlue_ValueChanged(object sender, EventArgs e)
        {
            this.textBoxBlue.Text = this.trackBarBlue.Value.ToString();
            SetPanelColor();
            if (null != ValueChanged)
            {
                ValueChanged(sender, e);
            }
        }

        private void panelColor_Click(object sender, EventArgs e)
        {
            m_bShowAll = !m_bShowAll;
            if (m_bShowAll)
            {
                Size sz = new Size(200, 150);
                this.Size = sz;
            }
            else
            {
                this.Size = this.panelColor.Size;
            }
        }

        private void textBoxRed_TextChanged(object sender, EventArgs e)
        {
            this.trackBarRed.Value = Convert.ToInt32(this.textBoxRed.Text.ToString());
        }

        private void textBoxGreen_TextChanged(object sender, EventArgs e)
        {
            this.trackBarGreen.Value = Convert.ToInt32(this.textBoxGreen.Text.ToString());
        }

        private void textBoxBlue_TextChanged(object sender, EventArgs e)
        {
            this.trackBarBlue.Value = Convert.ToInt32(this.textBoxBlue.Text.ToString());
        }
    }
}