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   源码介绍

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鼠标移动到哪里 就显示那里的颜色像素值

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 read_pixel
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public Bitmap myBitmap;
        private bool pick;

        private void Form1_Load(object sender, EventArgs e)
        {
        }

        private void btn_open_Click(object sender, EventArgs e)
        {
            OpenFileDialog of = new OpenFileDialog();
            of.Filter = "JPG图像(*.jpg)|*.jpg|BMP图像(*.bmp)|*.bmp|所有文件(*.*)|*.*";
            of.FilterIndex = 0;
            of.ShowDialog();
            String filename = of.FileName.ToString();

            //在此处加载一个新的图片。
           this.myBitmap  = new Bitmap(filename);
            // Stretches the image to fit the pictureBox.
            pictureBox1.SizeMode = PictureBoxSizeMode.AutoSize;
            Bitmap myImage =this .myBitmap ;//new Bitmap(fileToDisplay);
            //pictureBox1.ClientSize = new Size(xSize, ySize);
            pictureBox1.Image = (Image)myImage;
            //设置当前窗体与图片大小相当
            this.ClientSize = new Size(pictureBox1.Width   20, pictureBox1.Height   60);
            pick = true;//设为TRUE可以开始读取像素点
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (pick)
            {
                Color pixelColor = this.myBitmap.GetPixel(e.X, e.Y);
                //pixelColor = Color.FromArgb(255,0,0);//可以以此方法对COLOR变量进行RGB值设置。
                textBox1.Text = pixelColor.R.ToString();
                textBox2.Text = pixelColor.G.ToString();
                textBox3.Text = pixelColor.B.ToString();
            }
        }
    }
}