Therefore, this is the first place where the validation should be done.This eliminates the possibility the end-users will incorrectly enter the values.
When I type a French word in an Auto Complete Combo Box then submit it to add new record to database, the combo box throw an exception: Argument Out Of Range Exception was unhandled: Invalid Argument=Value of '0' is not valid for 'index'.
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If you need to require users to enter data in a well-defined format, such as a telephone number or a part number, you can accomplish this quickly and with minimal code by using the Masked Text Box control.
A is a string made up of characters from a masking language that specifies which characters can be entered at any given position in the text box. If the user types an incorrect entry, for example, the user types a letter when a digit is required, the control will automatically reject the input.
Is there anything in WPF I can use to get the same result, an event raised only after the user is done changing the text?
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Say Form1 has Text Box, Form1 is loaded modalessand Form2 is loaded Modaless but I want to run the Text Box Validating event.thanks,.
Introduction An important part of any data-driven application is ensuring data validation and handling errors when they occur.
Validation means that any data input meets the application requirements in order to ensure consistency and correctness of the data.