An unhandled exception (‘Unhandled Error in Silverlight Application Code:4004

The above error could be caused by one of the follow reasons.


The database does not support user instance. For example, you are using Domain Service Class.


An unhandled exception (‘Unhandled Error in Silverlight Application Code:4004

The video shows the original connection string is like:


<addname=AdventureWorks_DataEntitiesconnectionString=metadata=res://*/AdventureWorks.csdl|res://*/AdventureWorks.ssdl|res://*/AdventureWorks.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\AdventureWorks_Data.mdf;Integrated Security=True;User Instance=True;MultipleActiveResultSets=True&quot;providerName=System.Data.EntityClient />


and the changed to:


<addname=AdventureWorks_DataEntitiesconnectionString=metadata=res://*/AdventureWorks.csdl|res://*/AdventureWorks.ssdl|res://*/AdventureWorks.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\AdventureWorks_Data.mdf;Integrated Security=True;MultipleActiveResultSets=True&quot;providerName=System.Data.EntityClient />


which without the User Instance=True.



Connecting to SQL Server Express User Instances

Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance




About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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One Response to An unhandled exception (‘Unhandled Error in Silverlight Application Code:4004

  1. Pingback: An unhandled exception ('Unhandled Error in Silverlight Application … | Educating Our Workforce

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