i just want to compare two dates both are in two text boxes in formate of dd/mm/yyyy how can i do this

Use the DateTime object. You can check out the DateTime object's members here: http://msdn.microsoft.com/en-us/libr...e_members.aspx

Use built-in validators like:
compare validtor
RegularExpression validator

Set UICulture & Culture - Globalization/Localization.

You may use the compare validator. You may also convert both textbox strings to the same datetime format and then compare them using if.