In Client Web applications, when performing custom validation on a Form, developers cannot directly set Form.Valid manually. This creates a limitation in advanced scenarios where validation conditions can't be fully handled by the built-in validation framework.

For example, if a developer wants to invalidate the form based on a business rule such as: Number < 100000 there’s no way to directly set: Form.Valid = False

Instead, developers are forced to:

• Create an extra local boolean variable to store the validation result

• Reuse the same condition again when checking whether to proceed or show an error

This results in code duplication, reduced maintainability, and extra steps for logic that should be simple.

A better approach would be:

• Allow manual control of Form.Valid — enable developers to set it to True or False inside client logic flows or expressions

• Or introduce a built-in method like Form.Invalidate() that can be triggered conditionally, without relying solely on form input widgets

This would:

• Simplify complex validation scenarios

• Reduce the need for extra variables and duplicated conditions

• Improve logic readability and maintainability

• Let developers manage validation state more directly