Webform not allowed because it does not extend Class

Question

I have a very simple (currently) 1 page aspx website. It fails to compile with a message that I have not seen before. All other examples all seem to refer to master pages, which I do not have.

"Parser Error Message: 'Options.WebForm1' is not allowed here because it does not extend class 'System.Web.UI.Page'. Source Error: Line 1: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Options.WebForm1" %> Line 2:
Line 3:

Here is the top of Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"     
Inherits="Options.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">

And for Default.aspx.cs

namespace Options
{
    public partial class _Default : Page
    {

Inherits="Options.WebForm1" shouldn't be Inherits="Options._Default"? — Gusman

Varun Mehta Varun Mehta · Accepted Answer · 2017-05-03T20:39:18

What is Options.WebForm1 in <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Options.WebForm1" %>

It should look like this if you are using a namespace

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Options._Default" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:GridView runat="server" ID="grdTest"></asp:GridView>
        </div>
        <asp:TextBox runat="server" Id ="callfmptxt"/>  
    </form>
</body>
</html>

Code Behind-

using System;
using System.Web.UI;
namespace Options
{
    public partial class _Default : Page
    {
        private double callfmp = 0;
        public double BlackScholes(string CallPutFlag, double S, double X, double T, double r, double v) { return 0.0;}
        protected void allfmptxt_TextChanged(object sender, EventArgs e) { }
    }
}

Webform not allowed because it does not extend Class

1 Answers