NET备份还原SQL数据库

--数据库备份
ALTER PROCEDURE [dbo].[pr_b_BackDataBase]
(

@backup_db_name varchar(128),
@filename varchar(1000), --路径＋文件名字
@flag int output
)
as
declare @sql nvarchar(4000),@par nvarchar(1000)
if not exists(
select * from master..sysdatabases
where name=@backup_db_name
)
begin
select @flag=-1 /*数据库不存在*/
return
end
else
begin
if right(@filename,1)<>’/’ and charindex(’/’,@filename)<>0
begin
select @par=’@filename varchar(1000)’
select @sql=’BACKUP DATABASE ’+@backup_db_name+’ to disk=@filename with init’
execute sp_executesql @sql,@par,@filename
select @flag=1
return
end
else
begin
select @flag=0 /*参数@filename输入格式错误*/
return
end
end
RETURN