Validation Groups
In ASP.NET 1.x, you would assign validation controls to input controls such as
text boxes, password fields, radio buttons, and check boxes, and the validation
controls would automatically validate the data entered by an end user to input
controls. With ASP.NET 2.0, Microsoft introduces a new feature known as
validation groups, which enables you to create different groups of validation
controls and assign them to input controls, such as text boxes. You can assign
a validation group to a collection of input controls if you want to validate
the collection of input controls on the same criteria. For example, you can
assign the button control to a group of input controls and validate the data
entered to each group of input controls on a criterion. This feature is very
handy when you have multiple forms on a single web page. For example, you can
create a web page that contains login and password text boxes for registered
end users, and another set of controls for new end users to register with the
web site. In this case, you can use the validation group property to perform
different actions, such as logging on to the web site and registering an end
user.
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