C＃来捕获屏幕（2）--源程序代码

来源：互联网发布：同步带轮选型软件编辑：程序博客网时间：2024/05/22 03:27

C＃来捕获屏幕（2）--源程序代码

2008-01-03 15:29

三．用C＃来捕获屏幕的源程序代码（Capture.cs）：

了解上面的这些步骤的实现方法，就可以得到用C＃捕获屏幕的源程序，如下：

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Drawing.Imaging;

namespace WindowsApplication3

{

public partial class Form1 : Form

{

private Button button1;

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

button1 = new Button();

SuspendLayout();

button1.Location = new System.Drawing.Point(64, 40);

button1.Name = "button1";

button1.Size = new System.Drawing.Size(80, 32);

button1.TabIndex = 0;

button1.Text = "捕获";

button1.Click += new System.EventHandler(button1_Click);

AutoScaleBaseSize = new System.Drawing.Size(6, 14);

ClientSize = new System.Drawing.Size(216, 125);

Controls.Add(button1);

MaximizeBox = false;

MinimizeBox = false;

Name = "Form1";

Text = "C#捕获当前屏幕！";

ResumeLayout(false);

}

//声明一个API函数

[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]

private static extern bool BitBlt(

IntPtr hdcDest, // 目标 DC的句柄

int nXDest,

int nYDest,

int nWidth,

int nHeight,

IntPtr hdcSrc, // 源DC的句柄

int nXSrc,

int nYSrc,

System.Int32 dwRop // 光栅的处理数值

);

private void button1_Click(object sender, System.EventArgs e)

{

//获得当前屏幕的大小

Rectangle rect = new Rectangle();

rect = Screen.GetWorkingArea(this);

//创建一个以当前屏幕为模板的图象

Graphics g1 = this.CreateGraphics();

//创建以屏幕大小为标准的位图

Image MyImage = new Bitmap(rect.Width, rect.Height, g1);

Graphics g2 = Graphics.FromImage(MyImage);

//得到屏幕的DC

IntPtr dc1 = g1.GetHdc();

//得到Bitmap的DC

IntPtr dc2 = g2.GetHdc();

//调用此API函数，实现屏幕捕获

BitBlt(dc2, 0, 0, rect.Width, rect.Height, dc1, 0, 0, 13369376);

//释放掉屏幕的DC

g1.ReleaseHdc(dc1);

//释放掉Bitmap的DC

g2.ReleaseHdc(dc2);

//以JPG文件格式来保存

MyImage.Save(@"c:/Capture.jpg", ImageFormat.Jpeg);

MessageBox.Show("当前屏幕已经保存为C盘的capture.jpg文件！");

}

Graphics.FromImage 方法

从指定的 Image 创建新的 Graphics。

命名空间:System.Drawing程序集:System.Drawing（在 system.drawing.dll 中）