ASP & JavaScript

future3839

Hi, I have a few textbox on my form and would like to validate it through Java script. I know there is RequiredFieldValidator in asp.net but I would like to do that by Javascript. this is my code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Register.aspx.cs" Inherits="WebApplication1.Presentation.Register" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<style type="text/css">
    .style1
    {
        width: 100%;
    }
    .style2
    {
    }
    .style3
    {
        width: 153px;
        height: 17px;
    }
    .style5
    {
        width: 151px;
    }
    .style6
    {
        width: 91px;
    }
    .style7
    {
        height: 23px;
    }
    .style8
    {
        height: 26px;
    }
    .style9
    {
        height: 25px;
    }
    .style10
    {
        width: 151px;
        height: 23px;
    }
    .style11
    {
        width: 91px;
        height: 23px;
    }
</style>
<script language="javascript" type="text/javascript">

// <![CDATA[

    function StId\_txt\_onclick() {

    }

// ]]>
</script>
</head>
<body>
<form id="form1" runat="server">
<div>

    <table class="style1">
        <tr>
            <td colspan="4" class="style7">
                <asp:Label ID="PrsnInfo\_lbl" runat="server" Text="Personal Information"></asp:Label>
            </td>
        </tr>
        <tr>
            <td class="style9">
                <asp:Label ID="StId\_lbl" runat="server" Text="Student ID" Font-Names="Arial" 
                    Font-Size="Smaller"></asp:Label>
            </td>
            <td class="style9" colspan="3">
                <input id="StId\_txt" runat="server"
                    style="border: 0.3px inset #000000; height: 20px; width: 137px;" type="text" />
                <asp:RequiredFieldValidator ID="Required

Luc Pattyn

FWIW: While client-side validation may improve the user experience, you should always have validation on the server-side just to be safe. :)

Luc Pattyn [Forum Guidelines] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, they preserve indentation, improve readability, and make me actually look at the code.

keyur satyadev

I agree that server side validation is safe. still if you wish to proceed then please find below example to validate textbox. var txtValue = document.getElementById(<"%txt1.ClientID%">).value; if(txtValue==null || txtValue='') { alert('Please enter value in textbox.'); //message should be depends on requirement. return false; } Let me know still if you have any doubts.

Regards Keyur Satyadev