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用ASP.NET还原与恢复Sql server

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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
...{
/**////
/// 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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