C#实现远程桌面
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;
using System.Diagnostics;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Drawing.Imaging;
//原理:
该程序利用socket接受服务端发送来的指令,解析出相应的操作,客户端根据指令调用对应的方法。
该程序适用于初学者项目参考,其实时运行效率有待考证。
namespace TestOnLine
{
public partial class 软帝考试系统 : Form
{
Graphics g;
Bitmap bmp;
Graphics g2;
Bitmap bmp2;
string pro = "{0}&{1}&{2}&{3}&{4}";//我的软件的协传输议
string userName = Dns.GetHostName();// 获取我的主机名
IPAddress ip;//我的ip
IPAddress firedIp;//教师端的ip
int port = 9305;//我的端口号
public void UdpSendMessage(IPAddress sendIp, string cmdNo, string msg)
{
Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
//发送的内容
string context = string.Format(pro, userName, ip, DateTime.Now.Ticks, cmdNo, msg);
byte[] buffer = Encoding.Default.GetBytes(context);
//指定发给谁
client.Connect(sendIp, port);
//发送
client.Send(buffer);
//关闭
client.Close();
}
public void SendData()
{
IPAddress ip = firedIp;//
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
server.Connect(ip, port);
//server.SendBufferSize = 200000; //对udp协议没用
Rectangle rec1=new Rectangle (0,0,bmp.Width,bmp.Height);
Rectangle rec2=new Rectangle (0,0,bmp2.Width,bmp2.Height);
while (true)
{
//1
g.Clear(Color.White);
g.CopyFromScreen(0, 0, 0, 0, new Size(bmp.Width, bmp.Height));
g2.Clear(Color.White);
g2.DrawImage(bmp,rec2,rec1,GraphicsUnit.Pixel);
//2
//内存流,在内存中存在的流,不依赖于磁盘文件
MemoryStream ms = new MemoryStream();
bmp2.Save(ms, ImageFormat.Jpeg);
//将ms流中的所有内容拿出来
byte[] buffer = ms.GetBuffer();//得到这个流中的所有字节
int sendLen = 60000;
int times = buffer.Length / sendLen;
if (buffer.Length % sendLen != 0)
{
times++;
}
for (int i = 0; i < times - 1; i++)
{
server.Send(buffer,
i * sendLen, sendLen, SocketFlags.None);
}
server.Send(buffer, (times - 1) * sendLen,
buffer.Length - (times - 1) * sendLen, SocketFlags.None);
byte[] buf2 = new byte[1];//作为结束的标识
buf2[0] = 100;
server.Send(buf2);
}
}
public void UdpRecviceMessage()
{
Socket server = new Socket(AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
IPAddress recId = IPAddress.Any;
EndPoint ep = new IPEndPoint(recId, port);
server.Bind(ep);
byte[] buffer = new byte[65535];
while (true)
{
int len = server.Receive(buffer);
//将内容变为字符串
string msg = Encoding.Default.GetString(buffer, 0, len);
//解析这个字符串 毛主席:192.168.0.111:12122:9:炸
string[] arr = msg.Split('&');
string fName = arr[0];
string fIp = arr[1];
DateTime fDt = new DateTime(Convert.ToInt64(arr[2])); //DateTime.Parse(arr[2]);//2001-1-1
string cmd = arr[3];
string context = arr[4];
if (cmd=="1")//控制客户端,运行本程序,最大化,挂起系统热键
{
this.FormBorderStyle = FormBorderStyle.None;
this.WindowState = FormWindowState.Maximized;
Hook_Start();//禁止常用的功能键
firedIp = IPAddress.Parse(fIp);
//发送
Thread th = new Thread(new ThreadStart(SendData));
th.IsBackground = true;
th.Start();
}
if (cmd=="2")//
{
this.WindowState = FormWindowState.Minimized;
Hook_Clear();
}
}
}
public 软帝考试系统()
{
InitializeComponent();
Form.CheckForIllegalCrossThreadCalls = false;
Rectangle rec = Screen.PrimaryScreen.Bounds;
bmp = new Bitmap(rec.Width, rec.Height);
g = Graphics.FromImage(bmp);
bmp2 = new Bitmap(200, 150);
g2 = Graphics.FromImage(bmp2);
}
//[DllImport("WinLockDll.dll",CallingConvention=CallingConvention.StdCall)]
//DLL_EXP_IMP int WINAPI Desktop_Show_Hide(BOOL bShowHide)
//public static extern int CtrlAltDel_Enable_Disable(bool bEnableDisable);
private void button1_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
}
#region 屏蔽键盘第一步:声明API
//设置钩子
[DllImport("user32.dll")]
public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
//抽掉钩子
public static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll")]
//调用下一个钩子
public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("kernel32.dll")]
public static extern int GetCurrentThreadId();
[DllImport("kernel32.dll")]
public static extern IntPtr GetModuleHandle(string name);
#endregion
#region 屏蔽键盘第二步: 定义委托
public delegate int HookProc(int nCode, int wParam, IntPtr lParam);
static int hHook = 0;
public const int WH_KEYBOARD_LL = 13;
//LowLevel键盘截获,如果是WH_KEYBOARD=2,并不能对系统键盘截取,Acrobat Reader会在你截取之前获得键盘。
HookProc KeyBoardHookProcedure;
FileStream MyFs;//用流来屏蔽ctrl+alt+del
//键盘Hook结构函数
[StructLayout(LayoutKind.Sequential)]
public class KeyBoardHookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
#endregion
#region 屏蔽键盘第三步:编写钩子子程
//钩子要做的事,你要处理什么?
public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= 0)
{
KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));
if (kbh.vkCode == 91) // 截获左win(开始菜单键)
{
return 1;
}
if (kbh.vkCode == 92)// 截获右win
{
return 1;
}
if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc
{
return 1;
}
if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+f4
{
return 1;
}
if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab
{
return 1;
}
if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Alt)//截获alt+esc
{
return 1;
}
if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc
{
return 1;
}
if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+空格
{
return 1;
}
if (kbh.vkCode == 241) //截获F1
{
return 1;
}
//if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt) //截获Ctrl+Alt+空格
//{
// return 1;
//}
}
return CallNextHookEx(hHook, nCode, wParam, lParam);
}
#endregion
#region 屏蔽键盘第四步:调用的方法
//打开钩子 ,并用流屏蔽任务管理器
public void Hook_Start()
{
// 安装键盘钩子
if (hHook == 0)
{
KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyBoardHookProcedure,
GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);
//如果设置钩子失败.
if (hHook == 0)
{
Hook_Clear();
//throw new Exception("设置Hook失败!");
}
//MyFs = new FileStream(Environment.ExpandEnvironmentVariables("%windir%\\system32\\taskmgr.exe"), FileMode.Open);
//byte[] MyByte = new byte[(int)MyFs.Length];
//MyFs.Write(MyByte, 0, (int)MyFs.Length);
}
}
//PS:也可以通过将[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
//下的DisableTaskmgr项的值设为"1”来屏蔽任务管理器。
//取消钩子事件 ,并关闭流,取消对任务管理器的屏蔽
public void Hook_Clear()
{
bool retKeyboard = true;
if (hHook != 0)
{
retKeyboard = UnhookWindowsHookEx(hHook);
hHook = 0;
}
//if (null != MyFs)
//{
// MyFs.Close();
//}
//如果去掉钩子失败.
if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed.");
}
#endregion
#region 禁用ctrl+alt+del,和其它
//直接使用即可
//禁用ctrl+alt+del
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int CtrlAltDel_Enable_Disable(bool bEnableDisable);
禁止使用任务管理器
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int TaskManager_Enable_Disable(bool bEnableDisable);
隐藏开始按钮
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int StartButton_Show_Hide(bool bShowHide);
隐藏桌面
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int Desktop_Show_Hide(bool bShowHide);
隐藏任务栏
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int Taskbar_Show_Hide(bool bShowHide);
隐藏任务栏的系统时间
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int Clock_Show_Hide(bool bShowHide);
禁止切换任务
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int TaskSwitching_Enable_Disable(bool bEnableDisable);
//[DllImport("WinLockDll.dll", CallingConvention = CallingConvention.StdCall)]
//public static extern int Keys_Enable_Disable(bool bEnableDisable);
//DLL_EXP_IMP int WINAPI Keys_Enable_Disable(bool bEnableDisable);
//DLL_EXP_IMP int WINAPI AltTab1_Enable_Disable(bool bEnableDisable);
//DLL_EXP_IMP int WINAPI AltTab2_Enable_Disable(HWND hWnd, bool bEnableDisable);
//DLL_EXP_IMP int WINAPI Thread_Desktop(LPTHREAD_START_ROUTINE ThreadFunc, THREAD_DATA *td);
//DLL_EXP_IMP int WINAPI Process_Desktop(char *szDesktopName, char *szPath);
#endregion
//隐藏鼠标: Cursor.Hide();
//显示鼠标: Cursor.Show();
private void NetStart_FormClosed(object sender, FormClosedEventArgs e)
{
Hook_Clear();
//CtrlAltDel_Enable_Disable(true);//打开ctrl+alt+del功能
// Taskbar_Show_Hide(true);//启用任务栏
//Desktop_Show_Hide(true);//启用桌面显示
}
private void btnExit_Click(object sender, EventArgs e)
{
DialogResult dr= MessageBox.Show("是否确定退出?","友情提示!",MessageBoxButtons.YesNo,MessageBoxIcon.Question);
if (dr==DialogResult.Yes)
{
Application.Exit();
}
}
private void button1_Click_1(object sender, EventArgs e)
{
MessageBox.Show("ok");
}
private void panel1_MouseEnter(object sender, EventArgs e)
{
Size ss=new System.Drawing.Size(label1.Width,30);
label1.Size = ss;
label2.Visible = true;
label3.Visible = true;
}
private void panel2_MouseLeave(object sender, EventArgs e)
{
Size ss = new Size(label1.Width, 0);
label1.Size = ss;
label2.Visible = false;
label3.Visible = false;
}
private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void 软帝考试系统_Load(object sender, EventArgs e)
{
Thread th = new Thread(new ThreadStart(UdpRecviceMessage));
th.IsBackground = true;
th.Start();
//将鼠标的初始位置设定到form的左上角
// System.Windows.Forms.Cursor.Position = this.Location;
//CtrlAltDel_Enable_Disable(false);//禁止ctrl+alt+del
//Taskbar_Show_Hide(false);//隐藏任务栏
//Desktop_Show_Hide(false);//隐藏桌面
}
}
}
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