Question

I have two textboxes, each contain a time (textboxA / textboxB). I need to be able to validate that textboxA is before textboxB.

For exmaple:

• textboxA = 10:30 / textboxB = 12:30
  VALIDATION = true
• textboxA = 10:30 /
  textboxB = 10:00 VALIDATION = false

I would prefer to do the checks using server-side controls.

Thanks in advance for any help.

Clare

Answer 1

You’ll want to use the CompareValidator for that and since .NETs drag & drop validators provide both client-side and server-side validation you’re covered.

You’ll also want to check the Page.IsValid property before processing server side to verify that all the validation was successful.