Chapter 12. Validating User Input with Validation Controls

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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

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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 ...

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