C#

C# Socket 异步 SERVER

玻璃小屋 — Sun, 28 Feb 2010 14:37:00 GMT

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

// State object for reading client data asynchronously
public class StateObject
{
    // Client  socket.
    public Socket workSocket = null;
    // Size of receive buffer.
    public const int BufferSize = 1024;
    // Receive buffer.
    public byte[] buffer = new byte[BufferSize];
    // Received data string.
    public StringBuilder sb = new StringBuilder();
}

public class AsynchronousSocketListener
{
    // Thread signal.
    public static ManualResetEvent allDone = new ManualResetEvent(false);

    public AsynchronousSocketListener()
    {
    }

    public static void StartListening()
    {
        // Data buffer for incoming data.
        byte[] bytes = new Byte[1024];

        // Establish the local endpoint for the socket.
        // The DNS name of the computer
        // running the listener is "host.contoso.com".
        IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
        IPAddress ipAddress = ipHostInfo.AddressList[0];
        Console.Write(ipAddress);
        IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);

        // Create a TCP/IP socket.
        Socket listener = new Socket(AddressFamily.InterNetwork,
            SocketType.Stream, ProtocolType.Tcp);

        // Bind the socket to the local endpoint and listen for incoming connections.
        try
        {
            listener.Bind(localEndPoint);
            listener.Listen(100);

           // while (true)
            for(int i = 0; i < 10; i++)
            {
                // Set the event to nonsignaled state.
                //allDone.Reset();

                // Start an asynchronous socket to listen for connections.
                Console.WriteLine("Waiting for a connection");
                listener.BeginAccept(
                    new AsyncCallback(AcceptCallback),
                    listener);

                // Wait until a connection is made before continuing.
                //allDone.WaitOne();
            }

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }

        Console.WriteLine(" Press ENTER to continue");
        Console.Read();

    }

    public static void AcceptCallback(IAsyncResult ar)
    {
        // Signal the main thread to continue.
        //allDone.Set();

        Console.WriteLine("Client coming!!!");

        // Get the socket that handles the client request.
        Socket listener = (Socket)ar.AsyncState;
        Socket handler = listener.EndAccept(ar);

        listener.BeginAccept(
            new AsyncCallback(AcceptCallback),
            listener);

        Console.WriteLine("Waiting for a connection again");

        // Create the state object.
        StateObject state = new StateObject();
        state.workSocket = handler;
        handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
            new AsyncCallback(ReadCallback), state);
    }

    public static void ReadCallback(IAsyncResult ar)
    {
        String content = String.Empty;

        // Retrieve the state object and the handler socket
        // from the asynchronous state object.
        StateObject state = (StateObject)ar.AsyncState;
        Socket handler = state.workSocket;

        // Read data from the client socket.
        int bytesRead = handler.EndReceive(ar);

        if (bytesRead > 0)
        {
            // There  might be more data, so store the data received so far.
            state.sb.Append(Encoding.ASCII.GetString(
                state.buffer, 0, bytesRead));

            Console.WriteLine(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));

            // Check for end-of-file tag. If it is not there, read
            // more data.
            content = state.sb.ToString();
            if (content.IndexOf("<EOF>") > -1)
            {
                // All the data has been read from the
                // client. Display it on the console.
                Console.WriteLine("Read {0} bytes from socket. Data : {1}",
                    content.Length, content);
                // Echo the data back to the client.
                Send(handler, content);
            }
            else
            {
                // Not all data received. Get more.
                handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                new AsyncCallback(ReadCallback), state);
            }
        }
        else
        {
            Console.WriteLine("Client Leave!");
        }
    }

    private static void Send(Socket handler, String data)
    {
        // Convert the string data to byte data using ASCII encoding.
        byte[] byteData = Encoding.ASCII.GetBytes(data);

        // Begin sending the data to the remote device.
        handler.BeginSend(byteData, 0, byteData.Length, 0,
            new AsyncCallback(SendCallback), handler);
    }

    private static void SendCallback(IAsyncResult ar)
    {
        try
        {
            // Retrieve the socket from the state object.
            Socket handler = (Socket)ar.AsyncState;

            // Complete sending the data to the remote device.
            int bytesSent = handler.EndSend(ar);
            Console.WriteLine("Sent {0} bytes to client.", bytesSent);

            handler.Shutdown(SocketShutdown.Both);
            handler.Close();

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

    public static int Main(String[] args)
    {
        StartListening();
        return 0;
    }
}

免费屏幕录制软件和源代码 (C#)

玻璃小屋 — Fri, 04 Apr 2008 15:51:00 GMT

因为有录制屏幕的需要，找了几个软件都是收费的。于是就用 C# 结合 windows media encoder sdk 写了一个屏幕录像软件。

能全屏录制、指定区域录制、指定窗口录制和录制声音。

可以自己选择压缩算法，也可以自己定义压缩算法（当然都是M$提供的）。
软件其实就是加了个自己壳的 windows media encoder!

另外有几个问题：
1、指定窗口录制是伪功能，其实也是录制窗口所在位置的区域，而不是会自动跟随窗口录制。
2、录制时 IWMEncVideoSource2 的 Width 、Height 和 CroppingLeftMargin/CroppingTopMargin/CroppingRightMargin/CroppingBottomMargin 似乎有换算比例问题，所以指定区域录制时，区域会进行增大或减小以进行适应。搞不清他们到底是什么关系。
3、不会在录制时会录制区域进行闪烁边框。。好象C++里面可以用 media encoder 的这个功能，C#里面不知道怎么用。

欢迎提出使用意见，我将尽力改善。源代码地址：http://blog.vckbase.com/Files/zaboli/Desktop2Wmv.zip

注意：因为是C#写的，所以运行时需要先安装 .net framework 2.0! 源代码可以用 vs2005 直接编辑、编译！

以上问题如有解决办法，请帮忙改进。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using WMEncoderLib;
using System.Runtime.InteropServices;
using Microsoft.Win32;

namespace Desktop2Wmv
{
    public partial class FormMain : Form
    {
        [DllImport("user32")]
        static extern IntPtr SetCapture(IntPtr hwnd);
        [DllImport("user32")]
        static extern IntPtr ReleaseCapture();
        [DllImport("user32.dll")]
        static extern IntPtr WindowFromPoint(IntPtr xPoint, IntPtr yPoint);

        [DllImport("user32.dll")]
        static extern IntPtr GetDC(IntPtr hWnd);

        [StructLayout(LayoutKind.Sequential)]
        public struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
            public int Width() { return right - left; }
            public int Height() { return bottom - top; }
        }

        [DllImport("user32.dll")]
        // 注意，运行时知道如何列集一个矩形
        static extern IntPtr GetWindowRect(IntPtr hwnd, ref RECT rc);
        [DllImport("user32.dll")]
        static extern IntPtr PostMessage(IntPtr hWnd,IntPtr iMsg,IntPtr wParam,IntPtr lParam);

        WMEncoder enc;
        IWMEncSourcePluginInfoManager wspim;
        bool bMouseCaptured;

        bool bFirstRun = true;

        Rectangle lastrect = new Rectangle(0, 0, 0, 0);
        public FormMain()
        {
            InitializeComponent();
            enc = new WMEncoderClass();
            bMouseCaptured = false;
            bFirstRun = true;
        }

        private void FormMain_Load(object sender, EventArgs e)
        {

            LoadProfilesTocbb();

            try
            {

                this.tbFileSave.Text = LoadSetting("NewFile");

                this.tbX.Text = LoadSetting("tbX");
                this.tbY.Text = LoadSetting("tbY");
                this.tbL.Text = LoadSetting("tbL");
                this.tbW.Text = LoadSetting("tbW");
                bool bBlock = Convert.ToBoolean(LoadSetting("rbBlock"));
                bFirstRun = bBlock;
                this.rbBlock.Checked = bBlock;
                this.rbWindow.Checked = Convert.ToBoolean(LoadSetting("rbWindow"));
                this.rbScreen.Checked = Convert.ToBoolean(LoadSetting("rbScreen"));
                this.ckbAutoId.Checked = Convert.ToBoolean(LoadSetting("AutoId"));
                ckbSound.Checked = Convert.ToBoolean(LoadSetting("ckbSound"));
                ckbMin.Checked = Convert.ToBoolean(LoadSetting("ckbMin"));
                ckbShowBorder.Checked = Convert.ToBoolean(LoadSetting("ckbShowBorder"));

            }
            catch (Exception e1)
            {
            }
        }

        private bool SaveSetting(string strSetting,string strName)
        {
            try
            {
                RegistryKey rk = Registry.CurrentUser.CreateSubKey(@"Softwareitcope.comDesktop2Wmv");
                rk.SetValue(strSetting, strName);
                rk.Close();
                return true;
            }
            catch (Exception e1)
            {
            }
            return false;
        }

        private string LoadSetting(string strSetting)
        {
            string strName = "";
            try
            {

                RegistryKey rk = Registry.CurrentUser.OpenSubKey(@"Softwareitcope.comDesktop2Wmv");
                strName = rk.GetValue(strSetting).ToString();
            rk.Close();
            }
            catch (Exception e1)
            {
            }
            return strName;
        }

        private void DrawRectOnScreen(Rectangle rect, float iPixel, Color color)
        {

            IntPtr deskHandle = GetDC(IntPtr.Zero);     //NULL

            if(!lastrect.IsEmpty)
            {
                ControlPaint.DrawReversibleFrame(lastrect,color,FrameStyle.Thick);
            }

            ControlPaint.DrawReversibleFrame(rect, color, FrameStyle.Thick);

            lastrect = rect;

            //Graphics graphics = Graphics.FromHdc(deskHandle);
            //rect.Inflate(1, 1);
           // Pen pen = new Pen(color, iPixel);
            //graphics.DrawRectangle(pen, rect);
            //画
           // graphics.Dispose();
        }

        private void LoadProfilesTocbb()
        {
            //IWMEncPluginInfo wpi;
            enc = new WMEncoderClass();
            wspim = enc.SourcePluginInfoManager;
            wspim.Refresh();
            /*
            for (int i = 0; i < wspim.Count; i++)
            {
                wpi = wspim.Item(i);
                    this.textBox1.Text += wpi.Name;
                    this.textBox1.Text += " : ";
                    this.textBox1.Text += wpi.SchemeType;
                for (int j = 0; j < wpi.Count; j++)
                {
                    this.textBox1.Text += " -> ";
                    this.textBox1.Text += wpi.Item(j);

                }
                this.textBox1.Text += " ";
            }

            */

            IWMEncProfileCollection wpfc = enc.ProfileCollection;
            IWMEncProfile wp;
            this.cbbEncProfile.Items.Clear();
            for (int i = 0; i < wpfc.Count; i++)
            {
                wp = wpfc.Item(i);
                this.cbbEncProfile.Items.Add(wp.Name);
            }

            string strName = LoadSetting("CurProfile");

            if (strName.Length > 1)
            {
                cbbEncProfile.SelectedItem = strName;
            }

        }

        private void buttonCap_Click(object sender, EventArgs e)
        {
            // Declare objects and variables.
            IWMEncSourceGroupCollection SrcGrpColl;
            IWMEncSourceGroup2 SrcGrp;
            IWMEncAudioSource SrcAud;
            IWMEncVideoSource2 SrcVid;
            IWMEncProfile2 Pro;

            enc = new WMEncoderClass();
            try
            {
                SrcGrpColl = enc.SourceGroupCollection;
                SrcGrp = (IWMEncSourceGroup2)SrcGrpColl.Add("SG_1");
                SrcVid = (IWMEncVideoSource2)SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_VIDEO);
                if (ckbSound.Checked)
                {
                    SrcAud = (IWMEncAudioSource)SrcGrp.AddSource(WMENC_SOURCE_TYPE.WMENC_AUDIO);
                    SrcAud.SetInput("Default_Audio_Device", "DEVICE", "");
                }
                SrcVid.SetInput("ScreenCapture1", "ScreenCap", "");
                Pro = GetSelectProfile();
                if (Pro == null)
                {
                    MessageBox.Show("错误！请选中视频压缩模板！");
                    cbbEncProfile.Focus();
                    return;
                }

                /*
                for (int j = 0; j < Pro.AudienceCount; j++)
                {
                    IWMEncAudienceObj weado = Pro.get_Audience(j);

                    if (weado.Selected)
                    {
                        try
                        {

                            int idxVc = weado.get_VideoCodec(0);
                            weado.set_VideoHeight(0, Convert.ToInt32(tbL.Text));
                            weado.set_VideoWidth(0, Convert.ToInt32(tbW.Text));
                        }
                        catch (Exception e1)
                        {

                        }
                    }
                }

                */

                if (rbBlock.Checked || rbWindow.Checked)
                {
                    Size priScreen = SystemInformation.PrimaryMonitorSize;

                    float xx =  (float)SrcVid.Height / (float)priScreen.Height;
                    float yy =  (float)SrcVid.Width / (float)priScreen.Width;

                    int ix = Convert.ToInt32(tbX.Text);
                    int iy = Convert.ToInt32(tbY.Text);
                    int ih = Convert.ToInt32(tbL.Text);
                    int iw = Convert.ToInt32(tbW.Text);
                    //SrcVid.PixelFormat = WMENC_PIXELFORMAT_VIDEO.WMENC_PIXELFORMAT_RGB24;

                   // SrcVid.Height = ih;
                    //SrcVid.Width = iw;
                    SrcVid.CroppingLeftMargin = (int)((float)ix * yy);
                    SrcVid.CroppingTopMargin = (int)((float)iy * xx);

                    if (SrcVid.CroppingLeftMargin >= priScreen.Width)
                    {
                        MessageBox.Show("屏幕区域外！");
                        return;
                    }

                    if (SrcVid.CroppingTopMargin >= priScreen.Height)
                    {
                        MessageBox.Show("屏幕区域外！");
                        return;
                    }

                    int ibm = priScreen.Height - ih - iy;

                    if (ibm <= 0)
                    {
                        MessageBox.Show("屏幕区域外！");
                        return;
                    }

                    int irm = priScreen.Width - iw - ix;

                    if (irm <= 0)
                    {
                        MessageBox.Show("屏幕区域外！");
                        return;
                    }

                    SrcVid.CroppingRightMargin = (int)((float)irm * yy);
                    SrcVid.CroppingBottomMargin = (int)((float)ibm * xx);
                }

                SrcGrp.set_Profile(Pro);

                if (this.tbFileSave.Text.Length < 1)
                {
                    MessageBox.Show("请指定保存路径！");
                    tbFileSave.Focus();
                    return;
                }

                string sFile = this.tbFileSave.Text;
                string sExt = sFile.Substring(sFile.LastIndexOf("."));
                string [] sFileAr = sFile.Split(new char [] {'\','/'});
                StringBuilder sb = new StringBuilder();

                int i = 0;
                for (i = 0; i < sFileAr.Length - 1; i++)
                {
                    sb.Append(sFileAr[i]);
                    sb.Append("\");
                }

                string sPath = sb.ToString();

                sFile = sFileAr[sFileAr.Length - 1];
                sFile = sFile.Substring(0, sFile.LastIndexOf('.'));

                if (ckbAutoId.Checked)
                {
                    char[] cFile = sFile.ToCharArray();

                    sb.Remove(0, sb.Length);

                    for (i = cFile.Length - 1; i >= cFile.Length - 5; i--)
                    {
                        if (!(cFile[i] >= '0' && cFile[i] <= '9'))
                            break;
                        sb.Insert(0,cFile[i]);
                    }

                    int iLen = sb.Length;

                    if (iLen >= 5)
                    {
                        string sNum = Convert.ToString(Convert.ToInt32(sb.ToString()) + 1);
                        sNum = "0000000" + sNum;
                        sNum = sNum.Substring(sNum.Length - 5);
                        sFile = sFile.Replace(sb.ToString(), sNum);

                    }
                    else
                    {
                        sFile += "00000";
                    }

                }

                this.tbFileSave.Text = sPath + sFile + sExt;

                enc.File.LocalFileName = this.tbFileSave.Text;

                if (ckbMin.Checked)
                    this.WindowState = FormWindowState.Minimized;

                enc.Start();
                buttonCap.Enabled = false;
                buttonCapPas.Enabled = true;
                buttonCapStop.Enabled = true;
                buttonPlay.Enabled = false;

                SaveSetting("CurProfile",Pro.ProfileName);
                SaveSetting("NewFile", this.tbFileSave.Text);

                SaveSetting("rbScreen", Convert.ToString(rbScreen.Checked));
                SaveSetting("rbWindow", Convert.ToString(rbWindow.Checked));
                SaveSetting("rbBlock", Convert.ToString(rbBlock.Checked));
                SaveSetting("tbX", tbX.Text);
                SaveSetting("tbY", tbY.Text);
                SaveSetting("tbL", tbL.Text);
                SaveSetting("tbW", tbW.Text);
                SaveSetting("AutoId", Convert.ToString(ckbAutoId.Checked));
                SaveSetting("ckbSound", Convert.ToString(ckbSound.Checked));
                SaveSetting("ckbMin", Convert.ToString(ckbMin.Checked));
                SaveSetting("ckbShowBorder", Convert.ToString(ckbShowBorder.Checked));


            }
            catch (Exception e1)
            {
                MessageBox.Show(e1.Message);

            }

        }

        private void 打开主窗口ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Show();
            this.Activate();
            this.WindowState = FormWindowState.Normal;

        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if(MessageBox.Show("真的退出吗？","HotCapture",MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                this.Close();
            }
        }

        private IWMEncProfile2 GetSelectProfile()
        {
            IWMEncProfileCollection wpfc = enc.ProfileCollection;
            IWMEncProfile wp;
            IWMEncProfile2 wp2 = new WMEncProfile2Class();
            if (cbbEncProfile.SelectedIndex == -1)
            {
                return null;
            }
            for (int i = 0; i < wpfc.Count; i++)
            {
                wp = wpfc.Item(i);

                if (cbbEncProfile.SelectedItem.ToString() == wp.Name)
                {
                    wp2.LoadFromIWMProfile(wp);
                    return wp2;

                }
            }
            return null;
        }

        private void cbbEncProfile_SelectedIndexChanged(object sender, EventArgs e)
        {
            IWMEncProfileCollection wpfc = enc.ProfileCollection;
            IWMEncProfile wp;
            IWMEncProfile2 wp2 = new WMEncProfile2Class();
            for (int i = 0; i < wpfc.Count; i++)
            {
                wp = wpfc.Item(i);

                if (cbbEncProfile.SelectedItem.ToString() == wp.Name)
                {
                    wp2.LoadFromIWMProfile(wp);

                    this.tbEncProfileDetail.Text = wp.Description;
                    this.tbEncProfileDetail.Text += " ";
                    for (int j = 0; j < wp2.AudienceCount; j++)
                    {
                        IWMEncAudienceObj weado = wp2.get_Audience(j);

                        if (weado.Selected)
                        {
                            int lAud4cc;
                            object vAudCodecName = null;
                            int lVid4cc;
                            object vVidCodecName = null;
                            try
                            {
                                int idxAc = weado.get_AudioCodec(0);
                                lAud4cc = wp2.EnumAudioCodec(idxAc, out vAudCodecName);

                                int idxVc = weado.get_VideoCodec(0);
                                lVid4cc = wp2.EnumVideoCodec(idxVc, out vVidCodecName);
                            }
                            catch (Exception e1)
                            {

                            }
                            if(vAudCodecName != null)
                                this.tbEncProfileDetail.Text += "音频编码：" + vAudCodecName.ToString() + " ";
                            if (vVidCodecName != null)
                            {
                                this.tbEncProfileDetail.Text += "视频编码：" + vVidCodecName.ToString() + " ";
                                this.tbEncProfileDetail.Text += "视频高度：" + Convert.ToString(weado.get_VideoHeight(0)) + " 视频宽度：" + Convert.ToString(weado.get_VideoWidth(0)) + " ";


                            }

                            this.tbEncProfileDetail.Text += " +++++++++++++++++++++++++ ";
                        }
                    }


                }
            }
        }

        private void buttonSelfDefine_Click(object sender, EventArgs e)
        {
            WMEncProfileManager wepfm = new WMEncProfileManagerClass();
            //MessageBox.Show(wepfm.ProfileDirectory);
            wepfm.WMEncProfileEdit("自定义项目_hot", WMENC_MEDIA_FILTER.WMENC_FILTER_NONE, 0);

            LoadProfilesTocbb();
            //wepfm.WMEncProfileList(WMENC_MEDIA_FILTER.WMENC_FILTER_AV, 0);

        }

        private void bnBrowseDest_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Filter = "WMV文件(*.wmv)|*.wmv";
            sfd.RestoreDirectory = true;
            if (sfd.ShowDialog() == DialogResult.OK)
            {
                this.tbFileSave.Text = sfd.FileName;
            }
        }

        private void buttonCapStop_Click(object sender, EventArgs e)
        {
            enc.Stop();
            buttonCap.Enabled = true;
            buttonCapPas.Enabled = false;
            buttonCapStop.Enabled = false;
            buttonPlay.Enabled = true;
        }

        private void buttonCapPas_Click(object sender, EventArgs e)
        {
            if (buttonCapPas.Text == "暂停录制")
            {
                enc.Pause();
                buttonCapPas.Text = "取消暂停";

            }
            else
            {
                enc.Start();
                buttonCapPas.Text = "暂停录制";
            }

        }

        private void buttonPlay_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start(this.tbFileSave.Text);
        }

        private void rbScreen_CheckedChanged(object sender, EventArgs e)
        {
            if (rbScreen.Checked)
            {
                tbX.Text = Convert.ToString(0);
                tbY.Text = Convert.ToString(0);
                tbL.Text = Convert.ToString(SystemInformation.PrimaryMonitorSize.Height);
                tbW.Text = Convert.ToString(SystemInformation.PrimaryMonitorSize.Width);
            }
        }

        private void rbBlock_CheckedChanged(object sender, EventArgs e)
        {
            if (rbBlock.Checked && !bFirstRun)
            {
                bFirstRun = false;

            }
        }

        private void FormMain_MouseUp(object sender, MouseEventArgs e)
        {
            if (bMouseCaptured)
            {
                ControlPaint.DrawReversibleFrame(lastrect, Color.Red, FrameStyle.Thick);
                ReleaseCapture();
                Cursor = Cursors.Default;
                bMouseCaptured = false;
                rbWindow.Checked = true;

                tbX.Text = Convert.ToString(lastrect.X);
                tbY.Text = Convert.ToString(lastrect.Y);
                tbL.Text = Convert.ToString(lastrect.Height);
                tbW.Text = Convert.ToString(lastrect.Width);
            }
        }

        private void rbWindow_CheckedChanged(object sender, EventArgs e)
        {
        }

        private void FormMain_MouseMove(object sender, MouseEventArgs e)
        {
            if (bMouseCaptured)
            {

                Point p1 = new Point(e.X, e.Y);
                Point pc = PointToScreen(p1);

                RECT rect = new RECT();

                IntPtr Handle = (WindowFromPoint((IntPtr)pc.X, (IntPtr)pc.Y));

                GetWindowRect(Handle, ref rect);

                Rectangle rc = new Rectangle(rect.left, rect.top, rect.Width(), rect.Height());

                DrawRectOnScreen(rc, 2, Color.Red);

                //tbX.Text = Convert.ToString(pc.X);
                //tbY.Text = Convert.ToString(pc.Y);
            }
        }

        private void rbWindow_MouseDown(object sender, MouseEventArgs e)
        {
            lastrect.X = 0;
            lastrect.Y = 0;
            lastrect.Width = 0;
            lastrect.Height = 0;
            bMouseCaptured = true;
            SetCapture(this.Handle);
            Cursor = Cursors.Cross;
            //base.WindowState = FormWindowState.Minimized;
        }

        private void rbBlock_MouseDown(object sender, MouseEventArgs e)
        {

        }

        private void rbBlock_MouseUp(object sender, MouseEventArgs e)
        {
            base.Hide();

            System.Threading.Thread.Sleep(100);

            FormHoldScreen formhs = new FormHoldScreen();

            Bitmap CatchBmp = new Bitmap(Screen.AllScreens[0].Bounds.Width, Screen.AllScreens[0].Bounds.Height);//新建一个和屏幕大小相同的图片
            Graphics g = Graphics.FromImage(CatchBmp);
            g.CopyFromScreen(new Point(0, 0), new Point(0, 0), new Size(Screen.AllScreens[0].Bounds.Width, Screen.AllScreens[0].Bounds.Height));//保存全屏图片
            formhs.BackgroundImage = CatchBmp;

            formhs.SetDesktopBounds(0, 0, SystemInformation.PrimaryMonitorSize.Width, SystemInformation.PrimaryMonitorSize.Height);
            if (formhs.ShowDialog(this) == DialogResult.OK)
            {
                Rectangle rc = formhs.GetLastSelectRect();

                tbX.Text = Convert.ToString(rc.Left);
                tbY.Text = Convert.ToString(rc.Top);
                tbL.Text = Convert.ToString(rc.Height);
                tbW.Text = Convert.ToString(rc.Width);
            }
            else
            {
                rbScreen.Checked = true;
            }

            base.Show();
        }

        private void notifyIcon_Click(object sender, EventArgs e)
        {
            this.WindowState = FormWindowState.Normal;
        }
    }
}

如何：在 DHTML 代码和客户端应用程序代码之间实现双向通信 (摘自MSDN) (window.external)

玻璃小屋 — Tue, 19 Sep 2006 04:39:00 GMT

可以使用 WebBrowser 控件向 Windows 窗体客户端应用程序添加现有的动态 HTML (DHTML) Web 应用程序代码。在投入大量的开发时间创建基于 DHTML 的控件，并希望利用丰富的 Windows 窗体用户界面功能而无需重写现有的代码时，该控件十分有用。

使用 WebBrowser 控件，可以通过 ObjectForScripting 和 Document 属性在客户端应用程序代码和网页脚本代码之间实现双向通信。此外，可以对 WebBrowser 控件进行配置，使 Web 控件可以与应用程序窗体上的其他控件进行无缝整合，从而隐藏其 DHTML 实现。若要使控件无缝整合，请对所显示页的格式进行设置，使其背景颜色和视觉样式与窗体的其余部分匹配，然后使用 AllowWebBrowserDrop、IsWebBrowserContextMenuEnabled 和 WebBrowserShortcutsEnabled 属性禁用标准浏览器功能。

在 Windows 窗体应用程序中嵌入 DHTML

将 WebBrowser 控件的 AllowWebBrowserDrop 属性设置为 false，以防止 WebBrowser 控件打开拖放到其上的文件。
Visual Basic 复制代码

webBrowser1.AllowWebBrowserDrop = False
C# 复制代码

webBrowser1.AllowWebBrowserDrop = false;
将该控件的 IsWebBrowserContextMenuEnabled 属性设置为 false，以防止 WebBrowser 控件在用户右击它时显示其快捷菜单。
Visual Basic 复制代码

webBrowser1.IsWebBrowserContextMenuEnabled = False
C# 复制代码

webBrowser1.IsWebBrowserContextMenuEnabled = false;
将该控件的 WebBrowserShortcutsEnabled 属性设置为 false，以防止 WebBrowser 控件响应快捷键。
Visual Basic 复制代码

webBrowser1.WebBrowserShortcutsEnabled = False
C# 复制代码

webBrowser1.WebBrowserShortcutsEnabled = false;
在窗体的构造函数或 Load 事件处理程序中设置 ObjectForScripting 属性。

下面的代码将窗体类自身用于脚本对象。

注意

组件对象模型 (COM) 必须能够访问脚本对象。若要使窗体对 COM 可见，请将 ComVisibleAttribute 属性添加到窗体类中。
Visual Basic 复制代码

webBrowser1.ObjectForScripting = Me
C# 复制代码

webBrowser1.ObjectForScripting = this;
在应用程序代码中实现脚本代码将使用的公共属性或方法。

例如，如果要使用脚本对象的窗体类，请向窗体类添加以下代码。
Visual Basic 复制代码

Public Sub Test(ByVal message As String) MessageBox.Show(message, "client code") End Sub
C# 复制代码

public void Test(String message) { MessageBox.Show(message, "client code"); }
使用脚本代码中的 window.external 对象访问指定对象的公共属性和方法。

下面的 HTML 代码演示如何通过单击按钮对脚本对象调用方法。将此代码复制到 HTML 文档的 BODY 元素中，该文档使用控件的 Navigate 方法加载或被分配给控件的 DocumentText 属性。
复制代码

<button onclick="window.external.Test('called from script code')"> call client code from script code </button>
在脚本代码中实现应用程序代码将使用的函数。

下面的 HTML SCRIPT 元素提供了一个示例函数。将此代码复制到 HTML 文档的 HEAD 元素中，该文档使用控件的 Navigate 方法加载或被分配到控件的 DocumentText 属性。
复制代码

<script> function test(message) { alert(message); } </script>
使用 Document 属性从客户端应用程序代码访问脚本代码。

例如，将下面的代码添加到按钮 Click 的事件处理程序中。
Visual Basic 复制代码

webBrowser1.Document.InvokeScript("test", _ New String() {"called from client code"})
C# 复制代码

webBrowser1.Document.InvokeScript("test", new String[] { "called from client code" });

Visual Basic	复制代码
webBrowser1.AllowWebBrowserDrop = False

C#	复制代码
webBrowser1.AllowWebBrowserDrop = false;

Visual Basic	复制代码
webBrowser1.IsWebBrowserContextMenuEnabled = False

C#	复制代码
webBrowser1.IsWebBrowserContextMenuEnabled = false;

Visual Basic	复制代码
webBrowser1.WebBrowserShortcutsEnabled = False

C#	复制代码
webBrowser1.WebBrowserShortcutsEnabled = false;

注意
组件对象模型 (COM) 必须能够访问脚本对象。若要使窗体对 COM 可见，请将 ComVisibleAttribute 属性添加到窗体类中。

Visual Basic	复制代码
webBrowser1.ObjectForScripting = Me

C#	复制代码
webBrowser1.ObjectForScripting = this;

Visual Basic	复制代码
Public Sub Test(ByVal message As String) MessageBox.Show(message, "client code") End Sub

C#	复制代码
public void Test(String message) { MessageBox.Show(message, "client code"); }

	复制代码
<button onclick="window.external.Test('called from script code')"> call client code from script code </button>

	复制代码
<script> function test(message) { alert(message); } </script>

Visual Basic	复制代码
webBrowser1.Document.InvokeScript("test", _ New String() {"called from client code"})

C#	复制代码
webBrowser1.Document.InvokeScript("test", new String[] { "called from client code" });

调试完 DHTML 之后，将该控件的 ScriptErrorsSuppressed 属性设置为 true，以防止 WebBrowser 控件显示脚本代码问题的错误信息。

Visual Basic	复制代码
' Uncomment the following line when you are finished debugging. 'webBrowser1.ScriptErrorsSuppressed = True

C#	复制代码
// Uncomment the following line when you are finished debugging. //webBrowser1.ScriptErrorsSuppressed = true;

示例

下面的完整代码示例提供了一个演示应用程序，可用于理解此功能。HTML 代码通过 DocumentText 属性加载到 WebBrowser 控件中，而不是从单独的 HTML 文件加载。

Visual Basic	复制代码
Imports System Imports System.Windows.Forms Imports System.Security.Permissions <PermissionSet(SecurityAction.Demand, Name:="FullTrust")> _ <System.Runtime.InteropServices.ComVisibleAttribute(True)> _ Public Class Form1 Inherits Form Private webBrowser1 As New WebBrowser() Private WithEvents button1 As New Button() <STAThread()> _ Public Shared Sub Main() Application.EnableVisualStyles() Application.Run(New Form1()) End Sub Public Sub New() button1.Text = "call script code from client code" button1.Dock = DockStyle.Top webBrowser1.Dock = DockStyle.Fill Controls.Add(webBrowser1) Controls.Add(button1) End Sub Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) _ Handles Me.Load webBrowser1.AllowWebBrowserDrop = False webBrowser1.IsWebBrowserContextMenuEnabled = False webBrowser1.WebBrowserShortcutsEnabled = False webBrowser1.ObjectForScripting = Me ' Uncomment the following line when you are finished debugging. 'webBrowser1.ScriptErrorsSuppressed = True webBrowser1.DocumentText = _ "<html><head><script>" & _ "function test(message) { alert(message); }" & _ "</script></head><body><button " & _ "onclick=""window.external.Test('called from script code')"" > " & _ "call client code from script code</button>" & _ "</body></html>" End Sub Public Sub Test(ByVal message As String) MessageBox.Show(message, "client code") End Sub Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _ Handles button1.Click webBrowser1.Document.InvokeScript("test", _ New String() {"called from client code"}) End Sub End Class

C#	复制代码
using System; using System.Windows.Forms; using System.Security.Permissions; [PermissionSet(SecurityAction.Demand, Name="FullTrust")] [System.Runtime.InteropServices.ComVisibleAttribute(true)] public class Form1 : Form { private WebBrowser webBrowser1 = new WebBrowser(); private Button button1 = new Button(); [STAThread] public static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); } public Form1() { button1.Text = "call script code from client code"; button1.Dock = DockStyle.Top; button1.Click += new EventHandler(button1_Click); webBrowser1.Dock = DockStyle.Fill; Controls.Add(webBrowser1); Controls.Add(button1); Load += new EventHandler(Form1_Load); } private void Form1_Load(object sender, EventArgs e) { webBrowser1.AllowWebBrowserDrop = false; webBrowser1.IsWebBrowserContextMenuEnabled = false; webBrowser1.WebBrowserShortcutsEnabled = false; webBrowser1.ObjectForScripting = this; // Uncomment the following line when you are finished debugging. //webBrowser1.ScriptErrorsSuppressed = true; webBrowser1.DocumentText = "<html><head><script>" + "function test(message) { alert(message); }" + "</script></head><body><button " + "onclick=\"window.external.Test('called from script code')\">" + "call client code from script code</button>" + "</body></html>"; } public void Test(String message) { MessageBox.Show(message, "client code"); } private void button1_Click(object sender, EventArgs e) { webBrowser1.Document.InvokeScript("test", new String[] { "called from client code" }); } }

复制代码

using System;
using System.Windows.Forms;
using System.Security.Permissions;

[PermissionSet(SecurityAction.Demand, Name="FullTrust")]
[System.Runtime.InteropServices.ComVisibleAttribute(true)]
public class Form1 : Form
{
    private WebBrowser webBrowser1 = new WebBrowser();
    private Button button1 = new Button();

    [STAThread]
    public static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
    }

    public Form1()
    {
        button1.Text = "call script code from client code";
        button1.Dock = DockStyle.Top;
        button1.Click += new EventHandler(button1_Click);
        webBrowser1.Dock = DockStyle.Fill;
        Controls.Add(webBrowser1);
        Controls.Add(button1);
        Load += new EventHandler(Form1_Load);
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        webBrowser1.AllowWebBrowserDrop = false;
        webBrowser1.IsWebBrowserContextMenuEnabled = false;
        webBrowser1.WebBrowserShortcutsEnabled = false;
        webBrowser1.ObjectForScripting = this;
        // Uncomment the following line when you are finished debugging.
        //webBrowser1.ScriptErrorsSuppressed = true;

        webBrowser1.DocumentText =
            "<html><head><script>" +
            "function test(message) { alert(message); }" +
            "</script></head><body><button " +
            "onclick=\"window.external.Test('called from script code')\">" +
            "call client code from script code</button>" +
            "</body></html>";
    }

    public void Test(String message)
    {
        MessageBox.Show(message, "client code");
    }

    private void button1_Click(object sender, EventArgs e)
    {
        webBrowser1.Document.InvokeScript("test",
            new String[] { "called from client code" });
    }

}

编译代码

此代码需要：

对 System 和 System.Windows.Forms 程序集的引用。

请参见

参考

WebBrowser
System.Windows.Forms.WebBrowser.Document
System.Windows.Forms.WebBrowser.ObjectForScripting

其他资源

WebBrowser 控件（Windows 窗体）

C#