.NET Validators

I have been working a lot with .NET validators recently. I found this article that explains about them quite in depth: http://msdn.microsoft.com/en-us/library/aa479045.aspx

There are two new tricks I took out from this:
1. You can fire an individual validator from javascript using this: ValidatorValidate(document.getElementById("yourValidatorId")). I found it useful in this situation: I have a field taking a temperature value and they wanted to enter either in Fahrenheit or in Celsius. I made two text fields, one for Fahrenheit and one for Celsius, and one validator to validate the range of the Celsius field. When one value is entered or changed, javascript calculate and populate the other value. I didn't want to use one validator for each field because there was no room. So if I entered a value in Fahrenheit that was out of range the Celsius validator wouldn't fire until I submit the form. Now I can call the validator right after I convert Fahrenheit to Celsius so the Celsius field gets validated immediately.

2. You can use ValidatorHookupControl(control, val) to link controls to validators. It's helpful when you have a customvalidator. Without the hookup the validator wouldn't fire immediately. For example, you submit a form and then find that some control is not valid. You fix the problem but the error message won't disappear right away. The built-in validators such as requiredvalidator fires when the control is changed. So users will get confused by this inconsistent behavior, they might think they didn't fix the problem correctly.