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Validating a dropdownlist in javascript

This tutorial will show you how to create a Java Script-enabled form that checks whether a user has filled in the form correctly before it's sent to the server. First we'll explain why form validation is a useful thing, and then build up a simple example form, explaining things as we go along.At the end, there's a little exercise to keep you busy too!

Hi asp.ambur, According to your description, as far as I know, you can refer to the following steps: 1. Don’t leave it to the auto-generated default messages.Explain to your user what is wrong and suggest solutions. Web Controls; public partial class Validate From Database : System. Here I am proving a very simple solution for validate a dropdownlist using javascript. Now you can ask questions directly to me on my new site ASPForums.

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Using a library to do form validation can save lots of your development time. j Query Form validation library is the most popular validation library.

This post collects all my notes and references on j Query Form validation library.

There are two main methods for validating forms: (usually done using Java Script).

Server-side validation is more secure but often more tricky to code, whereas client-side (Java Script) validation is easier to do and quicker too (the browser doesn't have to connect to the server to validate the form, so the user finds out instantly if they've missed out that required field! In this tutorial we'll build a simple form with client-side Java Script validation.

Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.