Sql server用asp.net还原与恢复

来源:岁月联盟 编辑:zhuzhu 时间:2006-05-22

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(); } } }
/FooterTemplate> >  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(); } } } }