Validating dates vb
I want to validate that any entry in a column is a valid date, but a valid date using UK regional settings i.e dd/mm/yy.Is Date() seems to recognise both 13/7/2010 and 7/13/2010 as valid dates, but the later is not in the UK, or for my purposes. I have the procedure that traps the worksheet change event and tests any chnage to the required column, but cannot seem to be able to write any VBA code which passes 13/7/2010 and fails 7/13/2010.If you do not set the Cancel property, Windows Forms will assume that validation succeeded for that control, and raise the Validated event.For a code example that validates an email address in a Text Box, see Validating.Add the following inside your name Textbox's Leave event: Private Sub txt Name_Leave(sender As Object, e As System. Leave 'If Not A Matching Format Entered If Not Regex. If you are uncertain about the pattern I supplied, have a look here. Just a note, some surnames contain spaces and even hyphens. Sometimes there are even brackets surrounding the code. My surname contains a space and it can get quite frustrating if I am not allowed to enter my correct surname, or that I have to edit my surname not to include a space. In certain cases the international dialling code will also need to be supplied. Compiled _ ) Dim bln Possible Match As Boolean = re Email. Text) If bln Possible Match Then 'Check If Entered Email Is In Correct Format If Not txt Email. In simple terms, validation refers to ensuring entered data is well, valid. They make use of a pattern matching system to match the input with a certain pattern of data.Determining whether or not data is valid can sometimes be a painstaking process as there are numerous tests that need to be thought of. This means that as a programmer, you have the power to supply the exact pattern for the input you desire in any text input field. Again, certain special characters are obviously not allowed.
You could say that a program's testers are supposed to do this; yes, they should - nobody else should. If not, if there is even just one unallowed character that is not supposed to be there, the Match method will return False. Instead of you having to loop through each character to determine what that character is, you simply need the correct Regular Expression pattern. Clear() Surname Valid = False Else Surname Valid = True End If End Sub It is basically the exact same code for the Name box, but I just included the capability to comprehend a space character as well. People expect to enter a phone number in a format similar to this: ###-###-####. You may require that certain text fields not be zero-length, that a field be formatted as a telephone number or other type of well-formed data, or that a string not contain any unsafe characters that could be used to compromise the security of a database.