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Editorial Team
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Asked: 2026-06-01T10:01:50+00:00

How can I access a control on an aspx page from the cs file

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How can I access a control on an aspx page from the cs file in a programmatic way?

For instance, if I have a set of asp:Panel controls each with an ID named by a city (id="atlanta", id="chicago", id="pittsburgh", etc.) and then in the cs I grab a value from the database to match up to the control names what would I use?

I tried to use FindControl() as shown and it returns null.

aspx page:

<asp:Panel ID="atlanta" runat="server" Visible="false"></asp:Panel>

cs file:

controlName = storeLocation.City.ToLower();
Panel cityPanel = (Panel)FindControl(controlName);
cityPanel.Visible = true;

I suppose FindControl() is really for use in cases like Repeaters or Grids where you pass in the ItemTemaplate. In my case its just a simple content page with a content tag with a bunch of panels in it.

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1 Answer

  1. Editorial Team

    FindControl() isn’t recursive, which may be your problem. However, there are many implementations of a recursive version, such as this one.

    If you are creating the panels dynamically and you want access to them later in the page lifecycle, you can add them all to a Dictionary<string, Panel> where the ID is the key.

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