Dear all, i have tow tables 'Users' and 'Applications' every user may be has no,one or more applications how to write a SQL satement that get me every user who hasn't application. in other word i want user without application... thanks.

Dear All, how can I prvent user from entering specific pattern such as "1111" , "5555" and "123456789" , usin regular expression control. In other word I don't want user to repeat the number 4 or 5 times in input box. Ex: 1111 wrong 5555 wrong 1246 right Thanks for reply...

Hi, please, who know what is dot net nuke open source modules, and how i can use it in my application. who can explain it detailed and simple. thanks for reply...

i think to replacing my data storage (DB) with XML files which each file represent a table in DB and make select and other operations on them. Is my think right and why? Thanks for replay!!