1.在項目中添加SQLDmo dll文件引用（SQLDMO(SQL Distributed Management Objects，SQL分布式管理對象)）

2在相應頁面加using SQLDMO引用

3.下面是用C#語言書寫的用于Microsoft SQL Server數據庫備份和恢復的類：
using System;
namespace DbService
{
/// <summary>
/// DbOper類,主要實現對Microsoft SQL Server數據庫的備份和恢復
/// </summary>
public sealed class DbOper
{
/// <summary>
/// DbOper類的構造函數
/// </summary>
PRivate DbOper()
{
}
/// <summary>
/// 數據庫備份
/// </summary>
public static void DbBackup()
{
try
{
SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
oSQLServer.LoginSecure = false;
oSQLServer.Connect("localhost", "sa", "1234");
oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
oBackup.Database = "Northwind";
oBackup.Files = @"d://Northwind.bak";
oBackup.BackupSetName = "Northwind";
oBackup.BackupSetDescription = "數據庫備份";
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);
}
catch
{
throw;
}
}
/// <summary>
/// 數據庫恢復
/// </summary>
public static void DbRestore()
{
try
{
SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
oSQLServer.LoginSecure = false;
oSQLServer.Connect("localhost", "sa", "1234");
oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
oRestore.Database = "Northwind";
oRestore.Files = @"d://Northwind.bak";
oRestore.FileNumber = 1;
oRestore.ReplaceDatabase = true;
oRestore.SQLRestore(oSQLServer);
}
catch
{
throw;
}
}
}
}
參見在C#中運用SQLDMO備份和恢復Microsoft SQL Server數據庫
http://dev.csdn.net/develop/article/28/28564.shtm
當不使用要恢復的數據庫時以上方法可行，但當你使用了數據庫時就必須殺死該進程
代碼如下：
/// <summary>
/// 還原數據庫函數
/// </summary>
/// <param name="strDbName">數據庫名</param>
/// <param name="strFileName">數據庫備份文件的完整路徑名</param>
/// <returns></returns>
public bool RestoreDB(string strDbName,string strFileName)
{
//PBar = pgbMain ;
SQLDMO.SQLServer svr = new SQLDMO.SQLServerClass() ;
try
{
//服務器名，數據庫用戶名，數據庫用戶名密碼
svr.Connect("localhost","sa","hai") ;

SQLDMO.QueryResults qr = svr.EnumProcesses(-1) ;
int iColPIDNum = -1 ;
int iColDbName = -1 ;
for(int i=1;i<=qr.Columns;i++)
{
string strName = qr.get_ColumnName(i) ;
if (strName.ToUpper().Trim() == "SPID")
{
iColPIDNum = i ;
}
else if (strName.ToUpper().Trim() == "DBNAME")
{
iColDbName = i ;
}
if (iColPIDNum != -1 && iColDbName != -1)
break ;
}
//殺死使用strDbName數據庫的進程
for(int i=1;i<=qr.Rows;i++)
{
int lPID = qr.GetColumnLong(i,iColPIDNum) ;
string strDBName = qr.GetColumnString(i,iColDbName) ;
if (strDBName.ToUpper() == strDbName.ToUpper())
{
svr.KillProcess(lPID) ;
}
}

SQLDMO.Restore res = new SQLDMO.RestoreClass() ;
res.Action = 0 ;
res.Files = strFileName ;
res.Database = strDbName ;
res.ReplaceDatabase = true ;
res.SQLRestore(svr) ;
return true ;
}
catch
{
return false;
}
finally
{
svr.DisConnect() ;
}

}