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Editorial Team
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Asked: 2026-05-27T07:44:24+00:00

I’m trying to generate a Controller usind the Scaffolding Template Controller with read/write actions

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I’m trying to generate a Controller usind the Scaffolding Template “Controller with read/write actions and views, using Entity Framework”.

I created an ADO.net Data Entity Model and connected it to an MSSQL 2008 DB (hosted by GoDaddy) and I am able to select the correct Model class and Data context class, but when I click “Add”, I get the following error:

Unable to retrieve metadata for ‘Project.Models.ModelClass’. The entry ‘ProjectDataContext’ has already been added. (C:\Users…\Temp\tmpD167.tmp line 13)

The file “tmpD167.tmp” is a copy of my web.config

Line 13 is a connection string that looks like this (post sanitation):

    <add name="ProjectDataContext" connectionString="metadata=res://*/Models.Project.csdl|res://*/Models.Project.ssdl|res://*/Models.Project.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=project.db.12345678.hostedresource.com;initial catalog=projectdb;persist security info=True;user id=projectdbuser;password=Password00##;multipleactiveresultsets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

I have 2 other connection strings (one for ApplicationServices and the other for the project data) that are on lines 11 and 12.

Is my connection string formatted correctly?

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1 Answer

  1. Editorial Team

    can you remove your .edmx file and the reference to it in the web config and thenrecreate it?

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