用asp.net还原与恢复sqlserver数据库

    上次做了个项目，涉及到数据库的还原和恢复，到网上找了一下，是利用SQLDMO实现的，只要添加SQLDMO引用就好了，然后利用下边的类的方法就可以实现了。
     我把原作者的类扩充了一下，可以自动识别web.config里 的数据库连接字符串，可以通过变量设置还原恢复的信息。需要注意的时还原，还原的时候问题最大了，有别的用户使用数据库的时候无法还原，解决办法就是在MASTER数据库中添加一个存储过程：

create proc killspid (@dbname varchar(20))
as
begin
declare @sql nvarchar(500)
declare @spid int
set @sql=’declare getspid cursor for
select spid from sysprocesses where dbid=db_id(’’’+@dbname+’’’)’
exec (@sql)
open getspid
fetch next from getspid into @spid
while @@fetch_status<>-1
begin
exec(’kill ’+@spid)
fetch next from getspid into @spid
end
close getspid
deallocate getspid
end
GO

在还原之前先执行这个存储过程，需要传递dbname，就是你的数据库的名字。下边是类的原代码：（web.config里的数据库连接字符串是constr）
using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
namespace web.base_class
{
     /// <summary>
     /// DbOper类,主要应用SQLDMO实现对Microsoft SQL Server数据库的备份和恢复
     /// </summary>
     public class DbOper
     {
          private string server;
          private string uid;
          private string pwd;
          private string database;
          private string conn;
         /// <summary>
         /// DbOper类的构造函数
         /// </summary>
         public DbOper()

         {
              conn=System.Configuration.ConfigurationSettings.AppSettings["constr"].ToString();
              server=cut(conn,"server=",";");
              uid=cut(conn,"uid=",";");
              pwd=cut(conn,"pwd=",";");
              database=cut(conn,"database=",";");
         }
         public string cut(string str,string bg,string ed)
         {
              string sub;
              sub=str.Substring(str.IndexOf(bg)+bg.Length);
              sub=sub.Substring(0,sub.IndexOf(";"));
              return sub;
         }

         /// <summary>
         /// 数据库备份
         /// </summary>
         public  bool DbBackup(string url)
         {
              SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
              SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
              try
              {
                   oSQLServer.LoginSecure = false;
                   oSQLServer.Connect(server,uid, pwd);
                   oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
                   oBackup.Database = database;
                   oBackup.Files = url;//"d:\Northwind.bak";
                   oBackup.BackupSetName = database;
                   oBackup.BackupSetDescription = "数据库备份";
                   oBackup.Initialize = true;
                   oBackup.SQLBackup(oSQLServer);

                   return true;
              }
              catch
              {
                   return false;
                   throw;
              }
              finally
              {
                   oSQLServer.DisConnect();
              }
         }

         /// <summary>
         /// 数据库恢复
         /// </summary>
         public string DbRestore(string url)
         {
              if(exepro()!=true)//执行存储过程
              {
                   return "操作失败";
              }
              else
              {
                   SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
                   SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
                   try
                   {
                        oSQLServer.LoginSecure = false;
                        oSQLServer.Connect(server, uid, pwd);
                        oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
                        oRestore.Database = database;
                        oRestore.Files = url;//@"d:\Northwind.bak";
                        oRestore.FileNumber = 1;
                        oRestore.ReplaceDatabase = true;
                        oRestore.SQLRestore(oSQLServer);
                       return "ok";
                   }
                   catch(Exception e)
                   {
                       return "恢复数据库失败";
                       throw;
                   }
                   finally
                   {
                        oSQLServer.DisConnect();
                   }
              }
         }
          private bool exepro()
         {
              SqlConnection conn1 = new SqlConnection("server="+server+";uid="+uid+";pwd="+pwd+";database=master");
              SqlCommand cmd = new SqlCommand("killspid",conn1);
              cmd.CommandType = CommandType.StoredProcedure;
              cmd.Parameters.Add("@dbname","port");
              try
              {
                   conn1.Open();
                   cmd.ExecuteNonQuery();
                   return true;
              }
              catch(Exception ex)
              {
                   return false;
              }
              finally
              {
                   conn1.Close();
              }
         }
     }
}