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Editorial Team
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Asked: 2026-05-14T15:43:32+00:00

Ok, this question has been asked many times. Just googling with the error message:

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Ok, this question has been asked many times. Just googling with the error message:

The specified named connection is either not found in the configuration,
not intended to be used with the EntityClient provider, or not valid.

I have tried all suggestions on forums, help sites et blogs… nothing works!

Situation recap

I’m splitting solution into three different projects: one for my model with EF4, one of WinForm and one ASP.NET MVC web application. I have a problem with connections string and configuration.

Is there a updated solution using VS2010/EF4/.NET Framework 4.0?

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1 Answer

  1. Editorial Team

    Really, the answer is copying the <connectionStrings> section in the other project’s config files like mentionned above.

    <connectionStrings>
    <add name="DataEntities" connectionString="metadata=res://*/DataModel.csdl|res://*/DataModel.ssdl|res://*/DataModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=xxx;Initial Catalog=xxx;User Id=xxx;Password=xxx;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />
</connectionStrings>

    So, it’s the same answer as I saw before on many sites. In fact, it was working from the beginning, but I had another error (“Configuration system failed to initialize”), so I thought it was a wrong value of the connection string in the app.config. In fact, the app.config was valid, but just moving the section on bottom solved this… Bizarre?

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