Question

I have been looking into refactoring some old code into a new WCF service, based on net 4.0 and have into a little difficulty with what should be a simple exercise!

The scenario;

WCF Service hosted over HTTP, implementing our ServiceContract, which connects to a local Sql Server.

When attempting to run a simple NUnit test against the Service Call, I get the following error;

* HelpManager.Tests.GetPage.GetPageById Fault
Exception:
System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]:
Activation error occured while trying to get instance of type
Database, key “HelpManagement” (Fault Detail is equal to An
ExceptionDetail, likely created by
IncludeExceptionDetailInFaults=true, whose value is:
Microsoft.Practices.ServiceLocation.ActivationException: Activation
error occured while trying to get instance of type Database, key
“HelpManagement” —->
Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the
dependency failed, type =
“Microsoft.Practices.EnterpriseLibrary.Data.Database”, name =
“HelpManagement”. Exception occurred while: while resolving. Exception
is: InvalidOperationException – The type Database cannot be
constructed. You must configure the container to supply this value.
———————————————– At the time of the
exception, the container was:

Resolving
Microsoft.Practices.EnterpriseLibrary.Data.Database,HelpManagement
—-> System.InvalidOperationException: The type Database cannot be
constructed. You must configure the container to supply this value.
at
Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimiti…).

Our (pretty standard) WCF web.config for this, looks like;

<configSections>
    <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true"/>
</configSections>

<dataConfiguration defaultDatabase="HelpManagement"/>

<connectionStrings>
    <add name="HelpManagement" connectionString="server=(local);database=ieq;uid=;pwd=" providerName="System.Data.SqlClient"/>
</connectionStrings>

and an example of the code used to call it;

private const string DB_HelpManagement = "HelpManagement";
var db = DatabaseFactory.CreateDatabase(DB_HelpManagement);

Google et al have been no fun. I have checked versions etc and they all appear to be referencing the same 5.0.14 from GAC, so unsure as to what the problem is.

Thanks in advance

Answer 1

I wonder about Microsoft.Practices.ObjectBuilder.dll and Microsoft.Practices.EnterpriseLibrary.Common — are they referenced in the WCF project?