用asp.net还原与恢复sqlserver数据库

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();

}

}

}

}