请问,在.aspx中如何用c#程序备份一个mssqlserver数据库(不是复制.ldf和.mdf而是生成一个备份文件)

Question

在下的运行环境是:win2000+.net2003+mssqlserver2000

Answer 1

直接对论坛搜索下就有啦。
下面仅供参考是利用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();              }          }     }}