Web Forms :: Controls Not Being Recognized At Runtime?

Jan 14, 2011

I created a new page in an existing project. The existing pages are still good, but the new page is having problems at runtime. The problem is that controls are not recognized and throw a "object reference not found" error. I even tried Page.FindControl and that didn't work either. This is only happening with this page. The controls are recognized at design time, and are not recognized only at runtime.

The controls were copied from a regular Web form into a content form with a master page. They worked fine when in the regular web form. Could that be the issue?

I tried creating a new page and moving the controls over, but that didn't fix the problem. I also tried deleting the designer file and recreating it (using convert to web application) but that didn't resolve it either. I'm out of ideas here. Here is the page directive and the first control that is not recognized.

<%@ Page Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="default_grid.aspx.cs" Inherits="TestItemDevelopment.default_grid" %>
<asp:Content ID="Content4" ContentPlaceHolderID="mainContentHolder" runat="server">

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