using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
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using System.Drawing.Imaging;
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namespace 捕获屏幕
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{
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/**//// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
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{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.SaveFileDialog saveFileDialog1;
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/**//// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
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public Form1()
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{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
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//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
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/**//// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
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{
if( disposing )
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{
if (components != null)
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{
components.Dispose();
}
}
base.Dispose( disposing );
}
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Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
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/**//// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
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{
this.button1 = new System.Windows.Forms.Button();
this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(96, 192);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "截取屏幕";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// saveFileDialog1
//
this.saveFileDialog1.Filter = "JPG文件|*.Jpg";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "C#捕获当前屏幕!";
this.ResumeLayout(false);
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}
#endregion
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/**//// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
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{
Application.Run(new Form1());
}
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//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
);
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private void button1_Click(object sender, System.EventArgs e)
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{
//获得当前屏幕的大小
Rectangle rect = new Rectangle ( ) ;
//获得当前屏幕的大小,通过名字空间"System.Windows.Forms"中的"Screen"类的GetWorkingArea()方法
rect = Screen.GetWorkingArea ( this ) ;
//创建一个以当前屏幕为模板的图象--获得当前屏幕的graphic对象
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
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
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{
MyImage.Save( @saveFileDialog1.FileName,ImageFormat.Jpeg);
}
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}
}
}
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posted on
2007-04-02 13:12
过江
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