What are the different validators in ASP.NET?

by
  • Required field Validator
  • Range Validator
  • Compare Validator
  • Custom Validator
  • Regular expression Validator
  • Summary Validator

In ASP.NET, validators are used to perform validation checks on user input in web forms to ensure that the data entered by the user is valid before it is processed. There are several types of validators available in ASP.NET:

  1. RequiredFieldValidator: Ensures that the user enters a value in a specified input control.
  2. RegularExpressionValidator: Validates the input against a specified pattern defined by a regular expression.
  3. RangeValidator: Checks if the input falls within a specified range of values.
  4. CompareValidator: Compares the input value with another value or a control’s value.
  5. CustomValidator: Allows you to define a custom validation function to validate the input.
  6. ValidationSummary: Displays a summary of all validation errors on the page.

When asked about the different validators in ASP.NET in an interview, you could provide a brief description of each validator along with examples of when each one might be used. Additionally, you could discuss how validators contribute to improving the user experience by ensuring data integrity and providing helpful error messages.