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用ASP.NET还原与恢复Sql server

发布于:2016-03-09 11:18:41   分享到:

  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皇冠体育的网址|首页就可以实现了。

  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
??? ...{
??? /**////
???? /// DbOper类,主要应用SQLDMO实现对Microsoft SQL Server数据库的备份和恢复
??? ///
???? public class DbOper
??? ...{
??? private string server;
??? private string uid;
??? private string pwd;
??? private string database;
??? private string conn;
??? /**////
???? /// DbOper类的构造函数
??? ///
???? 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;
??? }
?? /**////
???? /// 数据库备份
??? ///
???? 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();
??? }
?? }
///数据库恢复 ///
? 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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ASP NET SQLServer

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