Required Field Validator In ASP.NET Web Forms | Form Validation In Web Forms

March 11, 2025

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="VALIDATION_FORM.aspx.cs" Inherits="VALIDATION_CONTROLS_PRACTICE.VALIDATION_FORM" %>

<!DOCTYPE html>

.auto-style1 {

width: 83%;

}

.auto-style2 {

height: 22px;

width: 449px;

}

.auto-style3 {

height: 22px;

width: 126px;

}

.auto-style4 {

width: 126px;

}

.auto-style5 {

width: 449px;

}

</style>

</head>

<body>

<div>

<h2>STUDENTS REGISTRATION FORM</h2>

<tr>

<td class="auto-style3">STUDENT NAME</td>

<asp:TextBox ID="NameTextBox" runat="server" Width="235px"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please Enter Student Name" ForeColor="Red" ControlToValidate="NameTextBox" Display="Dynamic" SetFocusOnError="true"></asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<td class="auto-style4">STUDENT EMAIL</td>

<asp:TextBox ID="EmailTextBox" runat="server" Width="235px"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please Enter Email" ForeColor="Red" ControlToValidate="EmailTextBox" Display="Dynamic" SetFocusOnError="true"></asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<td class="auto-style4">RE-ENTER EMAIL</td>

<asp:TextBox ID="ReEnterEmailTextBox" runat="server" Width="235px"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="Please Re-Enter Email" ForeColor="Red" ControlToValidate="ReEnterEmailTextBox" Display="Dynamic" SetFocusOnError="true"></asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Button ID="Button1" runat="server" Text="SUBMIT" Height="40px" Width="99px"/>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

Above File is VALIDATION_CONTROLS_PRACTICE\VALIDATION_FORM.aspx