Datagridview validating event c


12-Feb-2019 03:11

Therefore, this is the first place where the validation should be done.This eliminates the possibility the end-users will incorrectly enter the values.NET for dealing with validation and error handling in the client-side.The example is based on a Windows Forms control developed by me which is based on the Text Box control and handles validation in a standardized way in order to detect input errors and display them to users.

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Setting this property to True is a signal back to the control that the validation failed in the code that handles the event and this results that the focus won't leave the control, forcing the user to enter a correct value.Should this validation be done on the client-side or the server-side in a client/side application?Should this validation be done in the business layer or in the middleware component of a multi-layer application?Setting this property to False allows the validation process to continue.

A problem with this approach is that if the users enter an invalid value and tries to close the application, by default, they won't be able to do it. NET 2.0, we have the Auto Validate property on the Form class that lets you specify exactly what the behavior should be when the validation error occurs at the control level.

Some checks are business rules and thus conceptually they must be done in the business layer of the multi-layer application or in the server-side of a client/server application.