So, recently I came across a problem where I had wanted to invoke asp.net required filed from JavaScript. Fortunately, there is a way - and it’s pretty easy to do! Let’s take a look.
In this post, I will show you how to invoke the required field validator through javascript in asp.net.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ReqJs.aspx.cs" Inherits="ReqJs" %>
<!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 type="text/javascript">
function PerformCheck() {
if (Page_ClientValidate()) {
//Do some more stuff here
alert("Page Is Valid");
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
FirstName:
<asp:TextBox runat="server" ID="txtFirstName"></asp:TextBox>
<asp:RequiredFieldValidator ErrorMessage="*" Text="Please Enter first name" ControlToValidate="txtFirstName"
runat="server" /><br />
LastName:
<asp:TextBox runat="server" ID="txtLastName"></asp:TextBox>
<asp:RequiredFieldValidator ErrorMessage="*" Text="Please enter last name" ControlToValidate="txtLastName"
runat="server" /><br />
<input type="submit" id="btnSubmit" onclick="PerformCheck();" value="Validate" />
</div>
</form>
</body>
</html>