This document discusses validation in ASP.NET web applications. It describes six types of validation controls in ASP.NET: RequiredFieldValidation, CompareValidator, RangeValidator, RegularExpressionValidator, CustomValidator, and ValidationSummary. These controls validate user input and display error messages if the input does not meet validation requirements. RequiredFieldValidation ensures fields are not left blank, CompareValidator compares values between controls, and RangeValidator checks if a value falls within a specified range. RegularExpressionValidator matches a pattern using regular expressions. CustomValidator performs custom validation logic, and ValidationSummary displays a summary of all validation errors.

1. Validation of asp.net

2. VALIDATION
INDEX :
• What is Validation
• Types of validation

3. VALIDATION
Validation is important part of any web application.
User’s input must always be validated before sending
across different layers of the application.

4. TYPES OF VALIDATION CONTROLS :
There are six types of Validation Control in ASP.NET
:
1. RequiredFieldValidation Control
2. Compare Validator
3. Range Validator
4. RegularExpression Validator
5. Custom Validator
6. Validation Summary

5. 1) RequiredFieldValidation Control
• We can use the RequiredFieldValidation Control
to ensure that a particular input field in a form is
not left blank.
• And if it is left blank, the error message will be
displayed.

6. EXAMPLE :
Enter Your Name
:
Button
Enter Your Name
:
Button
! Please Enter Name
> Clicked
abcd Enter Your Name
:
OK
abcd

7. 2) CompareValidator Control
• CompareValidator Control is used to
compare the value of one input control to
the value of another input control.
• For Example: Password

8. EXAMPLE :
• PASSWORD
Password :
Re-enter pass :
OK
egg897
egg899
! Password does note match

9. 3) RangeValidator Control
• RangeValidator Control evaluates the
value of an input control to check that the
valued lies between specified range.
Control
• This can be a number , an alphabet or a
Date.

10. 4) RegularExpressionValidator
Control
• The RegularExpressionValidator Control helps ensure
that user input matches a defined pattern using regular
expression.
• For Example: Email ID, Phone Number.

11. 5) CustomValidator Control
• You can create a CustomValidator Control to
perform custom validation on user input.
• For Example:
1. Password must be between 6-12 characters.
2. Must have numeric value.
3. It must contain underscore.
User must
have to follow
these steps.

12. EXAMPLE:
Enter Password: Enter Password:
abc12 abc12
OK OK
! Please enter valid
password

13. 6) Validation Summary
A Validation summary is used to display summary of
all validation error in the web form.