Question

I have 3 text box fields. to represent a date

eg
DD MM YYYY

how can i validate only correct data is entered into each text box.
is it a regexpression??

i need to do this inside the ascx/aspx file rather than the .cs codebehind

thanks

Answer 1

You could validate each field with regexes, but it wouldn’t take into account different months with different numbers of days: you could enter invalid dates.

On the server side it could be validated with something like this:

DateTime D;
string CombinedDate=String.Format("{0}-{1}-{2}", YearField.Text, MonthField.Text, DayField.Text);
if(DateTime.TryParseExact(CombinedDate, "yyyy-M-d", DateTimeFormatInfo.InvariantInfo, DateTimeStyles.None, out D)) {
  // valid
} else {
  // not valid
}