ASP.NET MVC 5 Cannot Add Controller

Question

all,

Just wanted to add to the body of knowledge. I was confounded, trying many solutions, when I couldn't add a controller to just one MVC project. I was getting the error:

There was an error running the selected code generator:
'The parameter is incorrect [...] '

Answer below...

Thank you for this. The question would be even better if you expanded it to match the site format by separating the question and answer. Self answers are acceptable (and encouraged!), and are much clearer than a question with the answer in the body. — Claies
– Claies, Commented May 16, 2016 at 1:13

froodley · Accepted Answer · 2016-05-17 12:54:47Z

1

It turned out to be very obvious, but since it wasted my time, here you go:

I had saved my web.config file using Save as... to another location as a backup before making changes. The project was tracking the saved copy instead of the one in the project. It looked the same in the Solution Explorer, of course. Remove, add existing, et voila.

answered May 17, 2016 at 12:54

froodley

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Mark Carew · Accepted Answer · 2019-09-06 04:21:46Z

0

I solved this by Excluding the Web.Config from the project and then Including it in the project

answered Sep 6, 2019 at 4:21

Mark Carew

1

Comments

chandresh · Accepted Answer · 2021-02-19 04:09:01Z

0

It's a simple close your web.config file(or any system file) and try again. It will work.

answered Feb 19, 2021 at 4:09

chandresh

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