In this post I will show you how to invoke required field validator through java script 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>
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