WCF Service is showing error after implemented in IIS - wcf

Question

In my project I am using Enterprise Library to connect to database. It is working fine when I run the application from Visual Studio directly.
But this is showing error connecting to database when hosted in IIS on same machine. I have added log trace and got the following error
Resolution of the dependency failed, type =
"Microsoft.Practices.EnterpriseLibrary.Data.Database", name =
"(none)". 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,(none)
| Exception:Microsoft.Practices.ServiceLocation.ActivationException:
Activation error occured while trying to get instance of type
Database, key "" --->
Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the
dependency failed, type =
"Microsoft.Practices.EnterpriseLibrary.Data.Database", name =
"(none)". 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,(none)
---> System.InvalidOperationException: The type Database cannot be
constructed. You must configure the container to supply this value.
at
Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimitive(IBuilderContext
context, SelectedConstructor selectedConstructor) at
Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.PreBuildUp(IBuilderContext
context) at
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext
context) at
Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlanCreatorPolicy.CreatePlan(IBuilderContext
context, NamedTypeBuildKey buildKey) at
Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext
context) at
Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext
context) at Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type
t, Object existing, String name, IEnumerable1 resolverOverrides)
--- End of inner exception stack trace --- at
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object
existing, String name, IEnumerable1 resolverOverrides) at
Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, String
name, IEnumerable`1 resolverOverrides) at
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type
serviceType, String key) --- End of inner exception stack trace ---
at
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type
serviceType, String key) at
Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService](String
key) at
Microsoft.Practices.EnterpriseLibrary.Data.DatabaseFactory.InnerCreateDatabase(String
name)
My web.config of service is contains as below
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
<section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data"/>
</configSections>
<dataConfiguration defaultDatabase="OracleConnection">
<providerMappings>
<add databaseType="Microsoft.Practices.EnterpriseLibrary.Data.Oracle.OracleDatabase, Microsoft.Practices.EnterpriseLibrary.Data" name="Oracle.DataAccess.Client"/>
</providerMappings>
</dataConfiguration>
<connectionStrings>
<add name="OracleConnection" providerName="Oracle.DataAccess.Client" connectionString="User Id=***;Password=****;Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=*****)(PORT=1500)) (CONNECT_DATA=(SERVER = DEDICATED) (SERVICE_NAME =*****)));"/>
<add name="SybaseConnection" connectionString="providerName=Sybase.ASEOLEDBProvider;Server=****;Port=5050;Catalog=**;User Id=***;Password=****"/>
</connectionStrings>
I tried a lot but unable to find the cause of issue. :(
I checked the permission on the folder and Everyone has full control. WCF Service in IIS Anonymous access is enabled.
Could anyone please help?

Answer 1

The assembly you are using cannot find one of the assemblies it depends on, make sure all dependencies are either in the GAC or in the bin folder of your web app.

Answer 2

When i enabled 32 bit applications in IIS the error has been changed to
ORA-12638: Credential retrieval failed
The connection string is correct which is working with visual studio.
Is there any setting we need to do in Oralce part to acces connection from IIS?
This worked fine when updated sqlnet.ora file of oracle.