Abstract
POSApp at this stage illustrates how you can use the MVVM pattern to capture user interaction. In this implementation, it doesn’t perform any checks on data entered by the users. For example, users could enter a negative number or even a character in the quantity field. This will generate an error and will block the application. This chapter explains how you can deal with this situation.
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© 2016 John Kouraklis
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Kouraklis, J. (2016). Input Validation. In: MVVM in Delphi. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-2214-0_7
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DOI: https://doi.org/10.1007/978-1-4842-2214-0_7
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Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-2213-3
Online ISBN: 978-1-4842-2214-0
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