In this hour, we will cover
The various classes of input validation
How to use the RequiredFieldValidator to ensure that the user has provided input
How to use the CompareValidator
How to ensure that the user’s input falls between a range of values by using the RangeValidator
How to use the RegularExpressionValidator
As we have examined in previous hours, collecting user input through an ASP.NET page is a relatively easy task. Unfortunately, when we’re collecting a user’s input, there is no guarantee that it has been provided in an acceptable format. Consider a page that prompts the user for his weight, much like we did with the BMI calculator a few hours ...