I'm doing a Model first approach for a Microsoft MVC application. The solution is named "TutorialPile" divided into two projects, Domain and WebUI. I try to add a controller for the Tutorial object to the WebUI project, and I select the domain class and the DB context. However, I get the error, "Unable to retrieve metadata for TutorialPile.Tutorial. Unable to load the specified metadata resource."
Looking around online it looks like it can't find the edmx object in the connection string in the web.config file. I copied the connection string from the Domain project's app.config file but it still doesn't work. Here are the connection strings from the web.config file.
<add name="ApplicationServices" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" providerName="System.Data.SqlClient" />
<add name="TutorialPileModelContainer" connectionString="metadata=res://*/Models.TutorialPileModel.csdl|res://*/Models.TutorialPileModel.ssdl|res://*/Models.TutorialPileModel.msl;provider=System.Data.SqlClient;provider connection string="data source=.\SQLEXPRESS;initial catalog=TutorialPileDB;integrated security=True;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="TutorialPileDbContext" connectionString="metadata=res://*/Models.TutorialPileModel.csdl|res://*/Models.TutorialPileModel.ssdl|res://*/Models.TutorialPileModel.msl;provider=System.Data.SqlClient;provider connection string="data source=.\SQLEXPRESS;initial catalog=TutorialPileDB;integrated security=True;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
And here is the connection string that I copied.
<add name="TutorialPileDBEntities" connectionString="metadata=res://*/TutorialPile.csdl|res://*/TutorialPile.ssdl|res://*/TutorialPile.msl;provider=System.Data.SqlClient;provider connection string="data source=.\sqlexpress;initial catalog=TutorialPileDB;integrated security=True;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
Any ideas on what I need to change?
Make sure...
the edmx file's build action is set to EntityDeploy (select the file and go to the properties window).
Your WebUI project references the Domain project
Edit the connection string on your WebUI project to reference the metadata from the other project. Using * means it can come from any dll. BUT, if your edmx file is inside a folder, you have to map the hierarchy.
Eg:
Path to EDMX: TutorialPile.Domain/Model/TutorialPile.edmx
Connection string: res://*/Model.TutorialPile.csdl|res://*/Model.TutorialPile.ssdl|res://*/Model.TutorialPile.msl
Even better:
The documentation suggests you specify the assembly (for performance reasons) using the full name of the assembly (something like: AdventureWorks, 1.0.0.0, neutral, a14f3033def15840). I couldn't make it work. But, using only the name of the assembly works for me. So, if your domain project outputs a TutotialPile.Domain.dll, you can use:
res://TutorialPile.Domain/Model.TutorialPile.csdl|res://TutorialPile.Domain/Model.TutorialPile.ssdl|res://TutorialPile.Domain/Model.TutorialPile.msl
Related
I'm using EF code first approach in MVC and my web.config's connection string looks like-
<connectionStrings>
<add name="SchoolContext" connectionString="XYZ-server;integrated security=True;" providerName="System.Data.SqlClient"/>
</connectionStrings>
And I'm getting following error-
Server Error in '/' Application.
Could not determine storage version; a valid storage connection or a
version hint is required.
I also checked duplicates but none of them worked in my case-
Duplicate question1
Duplicate question2
I solved the issue by looking closely to the connection string, actually data source was missing, correct one is-
<add name="SchoolContext" connectionString="Data Source=XYZ-server;integrated security=True;" providerName="System.Data.SqlClient"/>
Please excuse me is this is a noob question. I have a MVC project with a number of EF Database first models. When I created them some were created with new connection strings.
I have tried to clean up the project web.config file and commented out the duplicated connection strings,
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFilename=........... />
<add name="DB_A09819_ProductsEntities" connectionString="metadata=........... />
<add name="DB_A09819_PowerDB001Entities" connectionString="metadata=........... />
<!--
<add name="DB_A09819_ProductsEntities_IntranetDownload" connectionString="metadata........... />
<add name="DB_A09819_ProductsPricing" connectionString="metadata=........... />
<add name="DB_A09819_ProductsProjectProposal" connectionString="metadata=.......... />
<add name="DB_A09819_ProductsProposalSystem" connectionString="metadata=........... />
-->
</connectionStrings>
I had thought that MVC would have picked up on the changes and raised errors, however with these changes the project builds and runs on development server.
When I try to add a controller I now get an error that the
---------------------------
Microsoft Visual Studio
---------------------------
Error
There was an error running the selected code generator:
'Unable to retrieve metadata for 'web...............t'.
No connection string named 'DB_A09819_..........'
could be found in the application config file.'
---------------------------
OK
---------------------------
I would like to change the associations and fix the connection string to have a single connection to each of the databases.
There are a number of posts where the solution is to add a connection string, I am trying to clean up my code and remove duplicate connection strings.
How do I change the association to the connection string in the Model and the controllers to ensure that it will run when deployed ?
I created a Black Solution (Arhi) with a ASP.NET MVC 4 Internet project (Arhi.Core) and Class library project for data (Arhi.Data) where I'm storing my EDMX Model.
I added a reference for Arhi.Data into Arhi.Core and I tried to add a Controller with a Model class from Arhi.Data (People entity) and I got this error.
'Unable to retrive metadata for 'Arhi.Core.People'. The specified
named connection is either not found in the configuration, not
inteneded to be used with the EntityClient provider, or not valid.'
Q : Why did I get this error ? Is my approach wrong / any recommendations?
Q2 : If I want to add RDLC reports to my solution, should I also use a Class Library project ?
Connection string from Arhi.Core
<add name="DefaultConnection" providerName="System.Data.SqlClient" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=aspnet-SalvamontMVC-20121108140556;Integrated Security=SSPI" />
and Arhi.Data
<add name="SalvamontEntities" connectionString="metadata=res://*/ModelSalva.csdl|res://*/ModelSalva.ssdl|res://*/ModelSalva.msl;provider=System.Data.SqlClient;provider connection string="data source=www.arhimedes.ro,1433;initial catalog=Salvamont;persist security info=True;user id=sa;password=********;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
in your first connection string not have user name and password if two database deference then give user name and password in first connection string
I've created an mvc project with following connection string (which is a default):
<add name="TestDb"
connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true"
providerName="System.Data.SqlClient" />
I would like to switch from SQL Server Express to one of the file databases, so that I can store my db in same repository. How can I do this (steps/connection string) ?
I'm using MVC code first approach. Thank you.
Install the the EntityFramework.SQLServerCompact NuGet package.
Change your connection string to this:
<add name="TestDb"
providerName="System.Data.SqlServerCe.4.0"
connectionString=
"Data Source=|DataDirectory|\aspnetdb.sdf" />
With Code First, you typically use the context class name as your connection string name.
I'm working on an mvc .net application and I'm using Entity Framework. I have the same database in different servers and I want to change the current server. I tried to change the connection string in the web.config file but it didn't work. How to safely change the server?
You must replace Data Source
<connectionStrings>
<add
name="AdventureWorksEntities"
connectionString="metadata=.\AdventureWorks.csdl|.\AdventureWorks.ssdl|.\AdventureWorks.msl;
provider=System.Data.SqlClient;
provider connection string='Data Source=.....;
Initial Catalog=....;
Integrated Security=True;
Connection Timeout=60;
multipleactiveresultsets=true'"
providerName="System.Data.EntityClient" />
</connectionStrings>
Changing the connection string in web.config is all you need to do.
Make sure you are changing the right connection string (the one with the metadata). Entity Framework will automatically put a connection string in the web.config when the model is first created.
The correct connection string will look something like this:
<add name="AdventureWorksEntities"
connectionString="metadata=.\AdventureWorks.csdl|.\AdventureWorks.ssdl|.\AdventureWorks.msl;
provider=System.Data.SqlClient;provider connection string='Data Source=localhost;
Initial Catalog=AdventureWorks;Integrated Security=True;Connection Timeout=60;
multipleactiveresultsets=true'" providerName="System.Data.EntityClient" />