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Editorial Team
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Asked: 2026-06-04T21:58:01+00:00

Fist off, I’m very new to ASP.NET and Visual Web Developer Express. I have

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Fist off, I’m very new to ASP.NET and Visual Web Developer Express.

I have a datagrid that I want to display subtotals in and have grouping.

I found this http://www.agrinei.com/gridviewhelper/gridviewhelper_en.htm which looks great. I’ve added the classes files to my projects App_code folder and re-built the project.

But when I try and use the GridViewHelper I get the error “The type or namespace name GridViewHelper could not be found”

Tried adding using GridViewHelper; to the top of my page but that also gets underlined and the same error.

So how do I tell my project to use the classes I’ve added?? I think this is a really stupid question but I cant find an answer!

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1 Answer

  1. Editorial Team

    Found the answer here: App_Code folder is missing in VS 2010

    So, for Web App Projects, you should instead Add a folder called something like ‘CodeFolder’ and then add you class in there. Then right click properties on that class file and set its build config to compile rather than content.

    It’s now working fine.

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