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();

 

              }

 

 

 

         }

 

     }

 

}

 

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