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   源码介绍

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using System;
using System.IO; 
using System.Net;
using System.Data;
using System.Threading;
using System.Collections;
using System.Diagnostics; 
using System.ComponentModel;
using System.ServiceProcess; 
using System.Data.SqlClient;

namespace LengYue
{
	/// <summary>
	/// 提供附加、分离、备份、还原数据库的操作方法
	/// </summary>
	public class OperDB_Lengyue
	{

		//使用集成连接数据库
		private static string ConnectionString="workstation id=\"" Dns.GetHostName() "\";integrated security=SSPI;data source=\""  
			".\";persist security info=False;Initial Catalog=master";

		private static void StartSqlServer()
		{
			
			ProcessStartInfo info=new ProcessStartInfo("net.exe"," start mssqlserver");
			info.CreateNoWindow=true;
			info.WindowStyle=ProcessWindowStyle.Hidden;
			Process ps=Process.Start(info);

//			Process[] process = Process.GetProcessesByName("sqlservr");
//			foreach (Process inpor in process)
//			{
//				return;//如果sql服务已经启动则返回
//			}
//			Process MyProcess= new Process();
//			//设定程序名
//			MyProcess.StartInfo.FileName = "cmd.exe";
//			//关闭Shell的使用
//			MyProcess.StartInfo.UseShellExecute = false;
//			//重定向标准输入
//			MyProcess.StartInfo.RedirectStandardInput = true;
//			//重定向标准输出
//			MyProcess.StartInfo.RedirectStandardOutput = true;
//			//重定向错误输出
//			MyProcess.StartInfo.RedirectStandardError = true;
//			//设置不显示窗口
//			MyProcess.StartInfo.CreateNoWindow = true;
//			//启动进程
//			MyProcess.Start();
//			//执行命令启动服务
//			MyProcess.StandardInput.WriteLine("net start mssqlserver");
//			//退出进程
//			MyProcess.StandardInput.WriteLine("exit");
//			// 等待200000毫秒让sql服务成功启动
//			Thread.Sleep(20000);
//			bool bl=true;
//			Process[] process2 = Process.GetProcessesByName("sqlservr");
//			foreach (Process inpor in process2)
//			{
//				bl=false;// 再次检查sql服务是否已经成功启动
//			}
//			if(bl)//如果sql服务还没有启动则抛出异常
//			{
//				throw new ApplicationException("无法启动sql服务！");
//			}
		}

		/// <summary>
		/// 附加数据库
		/// </summary>
		/// <param name="DbName">将数据库附加为的名字</param>
		/// <param name="Mdf">MDF</param>
		/// <param name="Ldf">LDF</param>
		/// <param name="Path">该参数为（Application.StartupPath）即当前运行程序的路径</param>
		/// <returns>附加成功返回真</returns>
		public static bool AddDataBase(string DbName,string path_Mdf,string path_Ldf) 
		{
			bool bl=false;
			StartSqlServer();//启动sql服务
			try
			{	
				SqlConnection Conn=new SqlConnection(ConnectionString);
				Conn.Open();
				//sp_detach_db分离数据，sp_attach_db附加数据
				string ComText="IF EXISTS (SELECT name FROM master.dbo.sysdatabases WHERE name = N'" DbName "')" 
					"begin	EXEC sp_detach_db " DbName " end  " //如果数据库已经存在则先分离
					"EXEC sp_attach_db @dbname = N'" DbName "'," 
					"@filename1 = N'" path_Mdf "'," 
					"@filename2 = N'" path_Ldf "'";
				SqlCommand Comm = new SqlCommand(ComText,Conn); 
				Comm.ExecuteNonQuery(); 
				Conn.Close();
				bl=true;
			}
			catch(Exception ex)
			{
				throw new ApplicationException("附加数据库失败",ex);
			}
			return bl;
		}
		
		/// <summary>
		/// 分离数据库
		/// </summary>
		/// <param name="DbName">要分离的数据库名</param>
		/// <returns>分离成功返回真</returns>
		public static bool SeverDataBase(string DbName) 
		{ 
			
			bool bl=false;
			StartSqlServer();//启动sql服务
			try
			{	
				SqlConnection Conn=new SqlConnection(ConnectionString);
				Conn.Open();
				//sp_detach_db分离数据，sp_attach_db附加数据
				string ComText="EXEC sp_detach_db " DbName;
				SqlCommand Comm = new SqlCommand(ComText,Conn); 
				Comm.ExecuteNonQuery(); 
				Conn.Close();
				bl=true;
			}
			catch(Exception ex)
			{
				throw new ApplicationException("分离数据库失败",ex);
			}
			return bl;
		} 
		/// <summary>
		/// 备份数据库
		/// </summary>
		/// <param name="DbName">要备份的数据库名</param>
		/// <param name="BackupPath_name">备份设备（路径 文件.bak）</param>
		/// <returns> 备份成功返回真</returns>
		public static bool BackupDataBase(string DbName,string BackupPath_name) 
		{ 
			
			bool bl=false;
			//如果看不懂下面的代码请不要随便改动
			StartSqlServer();//启动sql服务
			try
			{	
				SqlConnection Conn=new SqlConnection(ConnectionString);
				Conn.Open();
				//sp_detach_db分离数据，sp_attach_db附加数据
				string ComText="use master;backup database " DbName " to disk = '" BackupPath_name "'"; 
				SqlCommand Comm = new SqlCommand(ComText,Conn); 
				Comm.ExecuteNonQuery(); 
				Conn.Close();
				bl=true;
			}
			catch(Exception ex)
			{
				throw new ApplicationException("备份数据库失败",ex);
			}
			return bl;
		} 
		/// <summary>
		/// 还原数据库
		/// </summary>
		/// <param name="BackupPath_name">数据源（路径 文件）</param>
		/// <returns>还原成功返回真</returns>
		public static bool ReplaceDataBase(string DBName, string BackupPath_name) 
		{ 
			bool bl=false;
			StartSqlServer();//启动sql服务
			try
			{
				SqlConnection Conn=new SqlConnection(ConnectionString);
				Conn.Open();
				string ComText="use master;restore database " DBName " From disk = '" BackupPath_name "' with replace;"; 
				SqlCommand Comm = new SqlCommand(ComText,Conn); 
				Comm.ExecuteNonQuery(); 
				Conn.Close();
				bl=true;
			}
			catch(Exception ex)
			{
				throw new ApplicationException("还原数据库失败",ex);
			}
			return bl;
		} 
	}
}