[DUG] Validate data entry

[russell]

Hello John

A first step could be to capture the data in a control that ensures the data
is correctly formatted.
In the three examples below the format is fixed and ideal for a TMaskEdit
control.
In my document production package I accept data for arbitrary used defined
fields and allow users to specify their format by having them specify the
mask.

Your question is about display. I have not faced that question yet. If the
data is properly formatted could you display the data as strings?

Regards,
Russell

-----Original Message-----
From: delphi-bounces at delphi.org.nz [mailto:delphi-bounces at delphi.org.nz] On
Behalf Of John Bird
Sent: Thursday, 2 June 2011 12:00 a.m.
To: NZ Borland Developers Group - Delphi List
Subject: Re: [DUG] Validate data entry

I have a related question - I have been wondering how to display data in a 
dataset that is not either simple integer, string or date-time.

Examples are:

dates stored as an 8 digit integer (YYYYMMDD) (want to display as 
dd-mmm-yyyy and I already have the code to format it how I want)

IRD numbers - 9 digits displayed as XXX-XXX-XXX

Bank accounts  integers displayed as XX-XXXX-XXXXXXX-XX

Credit card numbers displayed as XXXX-XXXX-XXXX-XXXX

in each case stored as integers, but how could I intercept the display on 
displaying the data and after entry to reformat them like this?
What do others do?

For displaying I am hoping the answer is not just to store them as strings, 
as I still have the issue of how I validate entry.

John 

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