required field validator in asp.net for textbox using javascript
In this article, we are valid
the textbox for required field using java script. Java script is a client side
scripting language that means it check the textbox on client side not the
server side.
Script code :-
<script language="javascript" type="text/javascript">
function requiredvalidator(valueoftextbox) {
var TextBox1 = valueoftextbox.value;
var result = document.getElementById("lbresult");
if (TextBox1 == "") {
result.style.display = "";
return false;
}
else {
result.style.display = "none";
}
return true;
}
</script>
Source code:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="validator.aspx.cs" Inherits="validator" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language="javascript" type="text/javascript">
function requiredvalidator(valueoftextbox) {
var TextBox1 = valueoftextbox.value;
var result = document.getElementById("lbresult");
if (TextBox1 == "") {
result.style.display = "";
return false;
}
else {
result.style.display = "none";
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server" onblur="requiredvalidator(this);"></asp:TextBox>
<asp:Label ID="lbresult" runat="server" Style="display: none" Text="Required Field"></asp:Label>
</div>
</form>
</body>
</html>
Out Put:-
required field validator in asp.net for textbox using javascript
Reviewed by NEERAJ SRIVASTAVA
on
9:30:00 PM
Rating:
Reviewed by NEERAJ SRIVASTAVA
on
9:30:00 PM
Rating:
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