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用asp.net还原与恢复sqlserver数据库

 2005-01-13 17:00:10 来源:WEB开发网   
核心提示: 上次做了个项目,涉及到数据库的还原和恢复,用asp.net还原与恢复sqlserver数据库,到网上找了一下,是利用SQLDMO实现的,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))asbegindeclare @sql nv

   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();

      }

   }

}

}

Tags:asp net 还原

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