Hi, I have a web form, where I take in the user Date Of Birth (DOB) in a textbox in the form of mm/dd/yyyy.

However, if the user does not enter in the correct format user gets an error. This happens if the user enters "dd/mm/yyyy", "w", or any other letter. I add the DOB to my database on a function called AddUser. This is ran when I click the add button which runs the AddUser function.
I know that this isn't very hard, but I cannot get it to work!!

Please any help will be greatly appreciated.

Thanks in Advance,
Very frustrated!!

Hey,

You could use Regular expressions:

Imports System.Text.RegularExpressions

..

If (Regex.IsMatch(txtDOB.Text, "(1[0-2]|[1-9])/(3[0-1]|[1-2]0|[1-2]?[1-9])/[1-2][0-9]{3,}")) Then
  'Valid
Else
  'Invalid
End If

There are probably better Regular expressions.

Brian

I should also mention, that you won't be able to parse out users who enter the date:

3/10/2004

to actually mean October 3, 2004. It will see that as a valid date, because it is.

Brian

Hey brian,

Thanks for the fact post...could you explain regular expression or get me a link where I may read-up on this.

As I am still relativity new to the .NET world, I never read or seen regular expressions before.

Thanks again.
Mark

How do you suggest I go about validating the textbox for a valid date?

Mark

Well, in my previous example, 3/10/2004 is a valid date. There isn't anything you can do to that extent...

http://msdn.microsoft.com/library/?u...xpressions.asp

http://search.yahoo.com/search?p=%2B...t-151&toggle=1

Brian

Thanks Brian,

I have it working now.
Mark