用ASP.NET还原与恢复Sql server
用ASP.NET还原与恢复Sql server
发布时间:2016-12-29 来源:查字典编辑
摘要: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...

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 "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)

"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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