本小程序功能：在图片上取某一点的颜色
主要代码如下：
using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using bitmapTest.Properties;
namespace bitmapTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Bitmap myBitmap;
int cmd = 0;
private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.Image = Resources.bfq0002;
myBitmap = (Bitmap)pictureBox1.Image;
}
/// <summary>
/// 鼠标取色（移动）
/// </summary>
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
int mouseX = e.X;
int mouseY = e.Y;
txtPoint.Text = "(" + mouseX + "," + mouseY + ")";
if (rbtmutil.Checked)
{
//取色
try
{
Color pixelColor = myBitmap.GetPixel(mouseX, mouseY);
colorbox.BackColor = pixelColor;
txtColorValue.Text = System.Drawing.ColorTranslator.ToHtml(pixelColor);
}
catch
{ }
}
//命令
switch (cmd)
{
case 1: //画线
SolidBrush pixelBrush = new SolidBrush(Color.Red);
Graphics g = Graphics.FromImage(myBitmap);
g.FillRectangle(pixelBrush, mouseX, mouseY, 2, 2);
pictureBox1.Image = myBitmap;
break;
case 2:
break;
default:
break;
}
}
/// <summary>
/// 画笔
/// </summary>
private void btnpen1_Click(object sender, EventArgs e)
{
if (cmd == 1)
{
cmd = 0;
btnpen1.Image = Resources.png_05252;
this.toolTip1.SetToolTip(this.btnpen1, "单击使用画笔");
}
else
{
cmd = 1;
btnpen1.Image = Resources.png_05253;
this.toolTip1.SetToolTip(this.btnpen1, "单击禁用画笔");
}
}
/// <summary>
/// 恢复
/// </summary>
private void button1_Click(object sender, EventArgs e)
{
pictureBox1.Image = Resources.bfq0002;
myBitmap = (Bitmap)pictureBox1.Image;
}
/// <summary>
/// 鼠标取色（单击）
/// </summary>
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
//取色
try
{
Color pixelColor = myBitmap.GetPixel(e.X, e.Y);
colorbox.BackColor = pixelColor;
txtColorValue.Text = System.Drawing.ColorTranslator.ToHtml(pixelColor);
}
catch
{ }
}
}
}
程序界面如下：
