If User Is Not Entering Any Thing System Should Not Show Any Message?

Apr 15, 2010

I need expression for following things1.HH:MM in Military format2.mm/dd/YYYYThere is one catch if user is not entering any thing system should not show any message but if he is entering any thing then it should ask from the format.I am using a grid view with 20 rows ans in that so many columns are available. In that grid i have to check this thing

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