Feb 19, 2019 · So now, when our REST method calls Validate, validation actually occurs (so it's a bit deferred with respect to the previous approach) and validation is written without using strings to refer to fields (better compile time checking and less maintainability issues).

Oct 9, 2013 · The first one is an example of data entry validation for one edit box (there are several such) and the second is the code for the OnClick event of my Save button.

Sep 2, 2012 · Example usage: if IsValidDateCheck(tempStr) then ShowMessage(tempStr + ' is a valid date.') else ShowMessage(tempStr + ' is not a valid date.');

2 days ago · You should be able to use OnBeforePost of the table to do the validation, all field's should have their values. 'Abort' when validation fails. Additionally for field level validation, fields have OnValidate.

Sep 2, 2011 · Stuffing things into listboxes, formatting and filling in the values, validation of numbers and dates, converting enumerated types into strings (and back again).

This example uses the BeforeInsert event to do data validation. If the StrToInt function raises an exception, the edit control's contents are set to a valid value so that the assignment to the INTEGER field in the dataset will succeed.

Data Abstract for Delphi comes with two samples that demonstrate the use of Business Rules Scripting to provide data validation in the middle tier rather than in the client application. The sample also demonstrates using DA SQL to selectively retrieve some data from the schema, rather than the whole table.

Database Data Validation: Table-level validation: validation rules embedded within database structure & exceptions are raised when a record is attempted to be posted; advantages: validation is stored with the data

Sep 18, 2019 · I wrote two functions to handle the validation for these types of fields (val_date and val_float). I also wrote another function that will automatically apply these validation functions, when passed a database object.

Sep 22, 2023 · The implementation of data validation and integrity checks is a critical aspect of maintaining data accuracy and consistency in software applications. This overview highlights the process of achieving this goal using Delphi Data Access Components (DACs) within a Delphi-based application.