用asp.net還原與恢復sqlserver數據庫

上次做了個項目，涉及到數據庫的還原和恢復，到網上找了一下，是利用SQLDMO實現的，只要添加SQLDMO引用就好了，然後利用下邊的類的方法就可以實現了。

我把原作者的類擴充了一下，可以自動識別web.config裏 的數據庫連接字符串，可以通過變量設置還原恢復的信息。



需要注意的時還原，還原的時候問題最大了，有別的用戶使用數據庫的時候無法還原，解決辦法就是在MASTER數據庫中添加一個存儲過程：


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


在還原之前先執行這個存儲過程，需要傳遞dbname，就是你的數據庫的名字。下邊是類的原代碼：（web.config裏的數據庫連接字符串是constr）









using System;

using System.Configuration;

using System.Data.SqlClient;

using System.Data;

namespace web.base_class

{

     /// <summary>

     /// DbOper類,主要應用SQLDMO實現對Microsoft SQL Server數據庫的備份和恢復

     /// </summary>

     public class DbOper

     {

          private string server;

          private string uid;

          private string pwd;

          private string database;

          private string conn;

         /// <summary>

         /// DbOper類的構造函數

         /// </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>

         /// 數據庫備份

         /// </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 = "數據庫備份";

                   oBackup.Initialize = true;

                   oBackup.SQLBackup(oSQLServer);

                   return true;

              }

              catch

              {

                   return false;

                   throw;

              }

              finally

              {

                   oSQLServer.DisConnect();

              }

         }



         /// <summary>

         /// 數據庫恢復

         /// </summary>

         public string DbRestore(string url)

         {

              if(exepro()!=true)//執行存儲過程

              {

                   return "操作失敗";

              }

              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 "恢復數據庫失敗";

                       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();

              }



         }

     }

}