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   源码介绍

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C#屏幕取色器，获取对应点的RGB值，点击空格保存在文本框方便拷贝对应参数值，源代码方便直接拷贝到自身项目。

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;
using System.Runtime.InteropServices;

namespace 取色值
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        [DllImport("gdi32.dll")]
        static public extern uint GetPixel(IntPtr hDC, int XPos, int YPos);
        [DllImport("gdi32.dll")]
        static public extern IntPtr CreateDC(string driverName, string deviceName, string output, IntPtr lpinitData);
        [DllImport("gdi32.dll")]
        static public extern bool DeleteDC(IntPtr DC);



        string r="";
        string g = "";
        string b = "";
        static public byte GetRValue(uint color)
        {
            return (byte)color;
        }
        static public byte GetGValue(uint color)
        {
            return ((byte)(((short)(color)) >> 8));
        }
        static public byte GetBValue(uint color)
        {
            return ((byte)((color) >> 16));
        }
        static public byte GetAValue(uint color)
        {
            return ((byte)((color) >> 24));
        }
        public Color GetColor(Point screenPoint)
        {
            IntPtr displayDC = CreateDC("DISPLAY", null, null, IntPtr.Zero);
            uint colorref = GetPixel(displayDC, screenPoint.X, screenPoint.Y);
            DeleteDC(displayDC);
            byte Red = GetRValue(colorref);
            textBox1.Text = Convert.ToString(Red);
            r = Convert.ToString(Red);
            byte Green = GetGValue(colorref);
            textBox2.Text = Convert.ToString(Green);
            g = Convert.ToString(Green);
            byte Blue = GetBValue(colorref);
            textBox3.Text = Convert.ToString(Blue);
            b = Convert.ToString(Blue);
            return Color.FromArgb(Red, Green, Blue);
           
        }  
        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);
            Color cl = GetColor(pt);
            panel1.BackColor = cl;
           
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {


            //if (e.KeyCode == Keys.Space)
            //{



            //    //Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);
            //    //Color cl = GetColor(pt);
            //    //panel1.BackColor = cl;


            //    e.Handled = true;   //将Handled设置为true，指示已经处理过KeyPress事件
            //    textBox4.Text = r   "   "   g   "   "   b;
            //    textBox4.Enabled = true;

           


            //}


           
        }

        private void textBox4_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
            {

                textBox4.Text = "";

                //Point pt = new Point(Control.MousePosition.X, Control.MousePosition.Y);
                //Color cl = GetColor(pt);
                //panel1.BackColor = cl;


                e.Handled = true;   //将Handled设置为true，指示已经处理过KeyPress事件
                string tex = r   "——"   g   "——"   b;
               
                textBox4.Text = tex.TrimStart();
               




            }

        }
    }
}