C＃来捕获屏幕（2）--源程序代码

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）