Unable to call App_Code class from a code-behind

I have a class in a file that’s in the “App_Code” folder. I’m able to use this in an “aspx” file but not from a code-behind file. How do I make it visible to a code-behind?

NOTE: This is ASP.Net on Mono and I’m writing the classes directly, not using an IDE to compile them

My files:

Contents hide

ASPX FILE (testappcode.aspx)

CODE BEHIND (TestAppCode.aspx.cs)

APP_CODE CLASS (App_Code/MyAppCodeClass.cs)

Answers:

Method 1

ASPX FILE (testappcode.aspx)

<%@ Page language="c#" src="TestAppCode.aspx.cs" Inherits="TestAppCode.TestAppCode" AutoEventWireup="true" %>
<html>
  <head>
    <title>Test App_Code Folder</title>
  </head>
  <body>
    <form id="contactForm" runat="server">
    <asp:TextBox id="Name" runat="server" ></asp:TextBox>
    <asp:TextBox id="Age" runat="server" ></asp:TextBox>
    <asp:Button ID="Submit" runat="server" Text="Submit" onclick="SubmitForm" />
    </form>
  </body>
<html>

CODE BEHIND (TestAppCode.aspx.cs)

using System;
using System.Web.UI.WebControls;

namespace TestAppCode
{
    public class TestAppCode : System.Web.UI.Page
    {
    protected void SubmitForm(object sender, EventArgs e)
    {
        //It fails here with the error: CS0246: The type or namespace name
        //`MyAppCodeClass' could not be found. Are you missing a using
        //directive or an assembly reference?
        MyAppCodeClass m = new MyAppCodeClass();
    }
    }
}

APP_CODE CLASS (App_Code/MyAppCodeClass.cs)

public class MyAppCodeClass
{
         public MyAppCodeClass() {}
}

I tried giving it a namespace, but that doesn’t fix the issue.

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

Change your class’ Build Action to Compile.

enter image description here

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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