How to achieve single validation for multiple object property change

Question

I am using PropertyGrid.SelectedObjects (Winform control) property to show properties of multiple objects. I have custom descriptor for each property of each object which does a basic validation and executes business logic.

I would like execute only once the business logic only when all the validations are done. How to we do it?

Edit

PropertyGrid control when a value is set automatically uses MergedPropertyDescriptor which calls my custom descriptor's SetValue function in a loop which results in multiple business logic call. Which I want to avoid this without the use of any static variable

Edit2 This question is also posted in Microsoft Forums

Answer 1

Easiest:

myForm.submit = function() {
  if (checkValidation()) {
    // business logic;
    if (OK) return true;
  }
  return false;
};

I, personally, would prefer to simply use the submit method as a wrapper (the inner if-statement [when true] would call another [business logic] function which returns true or false).