ASP.Net Text Box Validation

Introduction

In this article, I explain how to create validations for a Text Box control in ASP.Net. I will start with the following three validations:

1. Accept alphanumeric characters
2. Accept Alphabet characters
3. Accept numeric characters

Requirement

Add the following line in the head section:

Code

First write the following script in your page to accept alphanumeric characters :

When you have done that code, add a TextBox and provide "txtalphaNumeric" for the id of the TextBox like :

2. Accept Alphabet characters

First write the following script in your page :

When you have done that code, add a TextBox and provide "txtalphabet" for the id of the TextBox like:

3. Accept numeric characters

First write the following script in your page :