Validation Group in Asp.net
Bangalore: If you want to validate first text box in your from by button 1 and second text box by button 2 the answer is Validation group, so you can categorize the form by validation group who is going to validate which fields as per your requirements.
Validation Post Click here
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GroupValidation.aspx.cs" Inherits="Validation.GroupValidation" %>
<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td>First Button</td>
<td>
<asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>*
</td>
<td>
<asp:RequiredFieldValidator id="fname" ValidationGroup="btn1" runat="server" ErrorMessage="Please Fill First Name" ControlToValidate="txtFirstName"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>Second Button</td>
<td>
<asp:TextBox id="txtLastName" runat="server" ></asp:TextBox>*
</td>
<td>
<asp:RequiredFieldValidator ValidationGroup="btn2" id="lname" runat="server" ErrorMessage="Please Fill Last Name" ControlToValidate="txtLastName"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Button runat="server" ID="btnlogin" ValidationGroup="btn1" Text="Register" />
</td>
<td>
<asp:Button runat="server" ID="btnCancel" Text="Register 2" ValidationGroup="btn2" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
If you don't want to validate by second button then you can set the cause validation is false
<asp:Button runat="server" ID="btnCancel" Text="Register 2" CausesValidation="false" />
Validation Post Click here
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="GroupValidation.aspx.cs" Inherits="Validation.GroupValidation" %>
<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td>First Button</td>
<td>
<asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>*
</td>
<td>
<asp:RequiredFieldValidator id="fname" ValidationGroup="btn1" runat="server" ErrorMessage="Please Fill First Name" ControlToValidate="txtFirstName"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>Second Button</td>
<td>
<asp:TextBox id="txtLastName" runat="server" ></asp:TextBox>*
</td>
<td>
<asp:RequiredFieldValidator ValidationGroup="btn2" id="lname" runat="server" ErrorMessage="Please Fill Last Name" ControlToValidate="txtLastName"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td>
<asp:Button runat="server" ID="btnlogin" ValidationGroup="btn1" Text="Register" />
</td>
<td>
<asp:Button runat="server" ID="btnCancel" Text="Register 2" ValidationGroup="btn2" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
If you don't want to validate by second button then you can set the cause validation is false
<asp:Button runat="server" ID="btnCancel" Text="Register 2" CausesValidation="false" />
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