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Asked: 2026-06-10T11:48:39+00:00

First – if anyone has an entity model with DB2 working, can you please

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First – if anyone has an entity model with DB2 working, can you please post it? And now for the explanation:

I have a development environment that has a SQL Server database (just for development) and uat/production environments with a DB2 database (more or less the same db, just on a different platform)

Using Visual Studio 2010 I can successfully generate an entity framework model against the SQL Server database, but not against DB2. I have DB2 9.7 client as well as the ‘IBM Database Add-ins for Visual Studio’ installed which allows me to create connections to the DB2 database and connect to it via Server Explorer, but when I try to generate a model from DB2 Visual Studio hangs and eventually I get an empty model.

Since I can generate a model from SQL Server, I am wondering if it is an easy switch to just change the web.config to point to DB2 instead of SQL Server when my environment switches.

Is anyone out there using entity framework with DB2, and if so can you please post your web.config so I can try just switching providers?

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1 Answer

  1. Editorial Team

    Two changes are necessary to switch your entity model to connect to DB2. Depending on what version of what you have this obviously may change. .edmx change:

    <!-- SQL SERVER <Schema Namespace="Models.myDb2Model.Store" Alias="Self" Provider="System.Data.SqlClient" ProviderManifestToken="2008"                  xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl">-->
                <Schema Namespace="Models.myDb2Model.Store" Alias="Self" Provider="IBM.Data.DB2"          ProviderManifestToken="DB2, 09.01.0005, 0, 0" xmlns:store="http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator" xmlns="http://schemas.microsoft.com/ado/2009/02/edm/ssdl">

    And here is the web.config change:

     <!-- SQL SERVER<add name="db2Connection" 
     connectionString="metadata=res://*/Models.db2Entities.csdl|res://*/Models.db2Entities.ssdl|res://*/Models.db2Entities.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=localhost;initial catalog=mySqlServerDb;integrated security=True;multipleactiveresultsets=True;App=EntityFramework&quot;" 
     providerName="System.Data.EntityClient" /> -->

  <add name="db2Connection" 
       connectionString="metadata=res://*/Models.db2Entities.csdl|res://*/Models.db2Entities.ssdl|res://*/Models.db2Entities.msl;provider=IBM.Data.DB2;provider connection string=&quot;Database=myDb2Db;User ID=myUserId;Password=MyPassword;Server=myServerName:myPort;DBName=myDbName;ConcurrentAccessResolution=Currentlycommitted;CurrentPackageSet=myCurrentPackageSet&quot;" 
       providerName="System.Data.EntityClient" />

    Edit: obviously your machine needs to be set up to connect to DB2, have the proper client and database add ins for VS.

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