capturescreenform.cs

这是一个简单的屏幕捕捉程序其中附带了保存图片路径功能,是一个还不错的小程序

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;

namespace CaptureScreen
{
    /// <summary>
    /// CaptureScreenForm 的摘要说明。
    /// </summary>
    public partial class CaptureScreenForm : System.Windows.Forms.Form
    {
        private System.Windows.Forms.PictureBox picbox;
        private System.Windows.Forms.Button exitBtn;
        private System.Windows.Forms.Button aboutBtn;
        private System.Windows.Forms.Button ClearBtn;
        private System.Windows.Forms.Button saveBtn;
        private System.Windows.Forms.Button fullScreenBtn;
        private System.Windows.Forms.Button mouseCaptureBtn;

        public static Image image = null;
        private System.Windows.Forms.Panel panel1;

        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public CaptureScreenForm()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        //protected override void Dispose(bool disposing)
        //{
        //    if (disposing)
        //    {
        //        if (components != null)
        //        {
        //            components.Dispose();
        //        }
        //    }
        //    base.Dispose(disposing);
        //}

        #region Windows 窗体设计器生成的代码
        /// <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()
        {
            this.picbox = new System.Windows.Forms.PictureBox();
            this.fullScreenBtn = new System.Windows.Forms.Button();
            this.mouseCaptureBtn = new System.Windows.Forms.Button();
            this.ClearBtn = new System.Windows.Forms.Button();
            this.saveBtn = new System.Windows.Forms.Button();
            this.aboutBtn = new System.Windows.Forms.Button();
            this.exitBtn = new System.Windows.Forms.Button();
            this.panel1 = new System.Windows.Forms.Panel();
            this.panel1.SuspendLayout();
            this.SuspendLayout();
            // 
            // picbox
            // 
            this.picbox.Location = new System.Drawing.Point(0, 40);
            this.picbox.Name = "picbox";
            this.picbox.Size = new System.Drawing.Size(680, 312);
            this.picbox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize;
            this.picbox.TabIndex = 0;
            this.picbox.TabStop = false;
            // 
            // fullScreenBtn
            // 
            this.fullScreenBtn.Location = new System.Drawing.Point(0, 0);
            this.fullScreenBtn.Name = "fullScreenBtn";
            this.fullScreenBtn.Size = new System.Drawing.Size(96, 32);
            this.fullScreenBtn.TabIndex = 1;
            this.fullScreenBtn.Text = "全屏截取";
            this.fullScreenBtn.Click += new System.EventHandler(this.fullScreenBtn_Click);
            // 
            // mouseCaptureBtn
            // 
            this.mouseCaptureBtn.Location = new System.Drawing.Point(120, 0);
            this.mouseCaptureBtn.Name = "mouseCaptureBtn";
            this.mouseCaptureBtn.Size = new System.Drawing.Size(96, 32);
            this.mouseCaptureBtn.TabIndex = 2;
            this.mouseCaptureBtn.Text = "鼠标截取";
            this.mouseCaptureBtn.Click += new System.EventHandler(this.mouseCaptureBtn_Click);
            // 
            // ClearBtn
            // 
            this.ClearBtn.Location = new System.Drawing.Point(240, 0);
            this.ClearBtn.Name = "ClearBtn";
            this.ClearBtn.Size = new System.Drawing.Size(88, 32);
            this.ClearBtn.TabIndex = 3;
            this.ClearBtn.Text = "清除截取图片";
            this.ClearBtn.Click += new System.EventHandler(this.ClearBtn_Click);
            // 
            // saveBtn
            // 
            this.saveBtn.Location = new System.Drawing.Point(352, 0);
            this.saveBtn.Name = "saveBtn";
            this.saveBtn.Size = new System.Drawing.Size(96, 32);
            this.saveBtn.TabIndex = 4;
            this.saveBtn.Text = "保存截取图片";
            this.saveBtn.Click += new System.EventHandler(this.saveBtn_Click);
            // 
            // aboutBtn
            // 
            this.aboutBtn.Location = new System.Drawing.Point(472, 0);
            this.aboutBtn.Name = "aboutBtn";
            this.aboutBtn.Size = new System.Drawing.Size(96, 32);
            this.aboutBtn.TabIndex = 5;
            this.aboutBtn.Text = "关  于";
            this.aboutBtn.Click += new System.EventHandler(this.aboutBtn_Click);
            // 
            // exitBtn
            // 
            this.exitBtn.Location = new System.Drawing.Point(592, 0);
            this.exitBtn.Name = "exitBtn";
            this.exitBtn.Size = new System.Drawing.Size(88, 32);
            this.exitBtn.TabIndex = 6;
            this.exitBtn.Text = "退  出";
            this.exitBtn.Click += new System.EventHandler(this.exitBtn_Click);
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.fullScreenBtn);
            this.panel1.Controls.Add(this.mouseCaptureBtn);
            this.panel1.Controls.Add(this.ClearBtn);
            this.panel1.Controls.Add(this.saveBtn);
            this.panel1.Controls.Add(this.aboutBtn);
            this.panel1.Controls.Add(this.exitBtn);
            this.panel1.Location = new System.Drawing.Point(0, 0);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(680, 32);
            this.panel1.TabIndex = 7;
            // 
            // CaptureScreenForm
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.AutoScroll = true;
            this.ClientSize = new System.Drawing.Size(696, 358);
            this.Controls.Add(this.panel1);
            this.Controls.Add(this.picbox);
            this.Name = "CaptureScreenForm";
            this.Text = "截取屏幕";
            this.panel1.ResumeLayout(false);
            this.ResumeLayout(false);

        }
        #endregion

        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.Run(new CaptureScreenForm());
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            if (image != null)
            {
                this.picbox.Image = image;
            }
            else
            {
                this.picbox.Image = null;
                this.picbox.Refresh();
            }
        }


        // 引用API

        [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
        public static extern bool BitBlt(
         IntPtr hdcDest, //目标设备的句柄 
         int nXDest, // 目标对象的左上角的X坐标 
         int nYDest, // 目标对象的左上角的X坐标 
         int nWidth, // 目标对象的矩形的宽度 
         int nHeight, // 目标对象的矩形的长度 
         IntPtr hdcSrc, // 源设备的句柄 
         int nXSrc, // 源对象的左上角的X坐标 
         int nYSrc, // 源对象的左上角的X坐标 
         System.Int32 dwRop // 光栅的操作值 
         );


        private void exitBtn_Click(object sender, System.EventArgs e)
        {
            Application.Exit();
        }

        private void aboutBtn_Click(object sender, System.EventArgs e)
        {
            MessageBox.Show("Code by Star in 2006-3-17,E_mail: [e-mail] ,thank you to use this.");
        }

        private void ClearBtn_Click(object sender, System.EventArgs e)
        {
            CaptureScreenForm.image = null;
            this.Invalidate();
        }

        private void saveBtn_Click(object sender, System.EventArgs e)
        {
            bool isSave = true;
            SaveFileDialog saveImageDialog = new SaveFileDialog();
            saveImageDialog.Title = "Capture screen image save dialog";
            saveImageDialog.Filter = @"jpeg|*.jpg|bmp|*.bmp|gif|*.gif";

            if (saveImageDialog.ShowDialog() == DialogResult.OK)
            {
                string fileName = saveImageDialog.FileName.ToString();

                if (fileName != "" && fileName != null)
                {
                    string fileExtName = fileName.Substring(fileName.LastIndexOf(".") + 1).ToString();

                    System.Drawing.Imaging.ImageFormat imgformat = null;

                    if (fileExtName != "")
                    {
                        switch (fileExtName)
                        {
                            case "jpg":
                                imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                                break;
                            case "bmp":
                                imgformat = System.Drawing.Imaging.ImageFormat.Bmp;
                                break;
                            case "gif":
                                imgformat = System.Drawing.Imaging.ImageFormat.Gif;
                                break;
                            default:
                                MessageBox.Show("只能存取为: jpg,bmp,gif 格式");
                                isSave = false;
                                break;
                        }

                    }

                    //默认保存为JPG格式
                    if (imgformat == null)
                    {
                        imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                    }

                    if (isSave)
                    {
                        try
                        {
                            CaptureScreenForm.image.Save(fileName, imgformat);
                            MessageBox.Show("图片已经成功保存!~~");
                        }
                        catch
                        {
                            MessageBox.Show("保存失败,你还没有截取过图片或已经清空图片!");
                        }
                    }

                }

            }
        }

        private void fullScreenBtn_Click(object sender, System.EventArgs e)
        {
            CaptureScreenForm.image = windowFullScreen();
            picbox.Image = CaptureScreenForm.image;
        }

        public static Bitmap windowFullScreen()
        {
            //建立屏幕Graphics
            Graphics grpScreen = Graphics.FromHwnd(IntPtr.Zero);
            //根据屏幕大小建立位图
            Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, grpScreen);
            //建立位图相关Graphics
            Graphics grpBitmap = Graphics.FromImage(bitmap);
            //建立屏幕上下文
            IntPtr hdcScreen = grpScreen.GetHdc();
            //建立位图上下文
            IntPtr hdcBitmap = grpBitmap.GetHdc();
            //将屏幕捕获保存在图位中
            BitBlt(hdcBitmap, 0, 0, bitmap.Width, bitmap.Height, hdcScreen, 0, 0, 0x00CC0020);
            //关闭位图句柄
            grpBitmap.ReleaseHdc(hdcBitmap);
            //关闭屏幕句柄
            grpScreen.ReleaseHdc(hdcScreen);
            //释放位图对像
            grpBitmap.Dispose();
            //释放屏幕对像
            grpScreen.Dispose();

            //返回捕获位图
            return bitmap;
        }

        private void mouseCaptureBtn_Click(object sender, System.EventArgs e)
        {
            MouseCaptureForm mouseCapture = new MouseCaptureForm();
            mouseCapture.Show();
        }
    }
}