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=",";
15890
");




         }




         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();




              }








         }




     }




}