EF and Webservice Error "System.InvalidOperationException"
I started a new project. Created a class library added EF item to it under a DB namespace and then create a class(Stripped down) for each entity that i can expose in WS. I ref the CL in a windows test app to see if everything was working and it was.So i created a WS add reference addedd the connectionstring for EF and then created a webmethod that retruns the object i created for each entity.
so my namspaces looks like this
[projectName].CL.Item - created object [projectName].CL.DB.Item - Ef Item [projectName].WS - Webservice namespace
So i ran the ws and tested it. and i get this lovely little exception.
System.InvalidOperationException: Unable to generate a temporary class (result=1).
error CS0012: The type 'System.Data.Objects.DataClasses.EntityObject' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
at System.Xml.Serialization.Compiler.Compile(Assembly parent, String ns, XmlSerializerCompilerParameters xmlParameters, Evidence evidence)
at System.Xml.Serialization.TempAssembly.GenerateAssembly(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, Evidence evidence, XmlSerializerCompilerParameters parameters, Assembly assembly, Hashtable assemblies)
at System.Xml.Serialization.TempAssembly..ctor(XmlMapping[] xmlMappings, Type[] types, String defaultNamespace, String location, Evidence evidence)
at System.Xml.Serialization.XmlSerializer.FromMappings(XmlMapping[] mappings, Evidence evidence)
at System.Web.Services.Protocols.XmlReturn.GetInitializers(LogicalMethodInfo[] methodInfos)
at System.Web.开发者_开发知识库Services.Protocols.XmlReturnWriter.GetInitializers(LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.MimeFormatter.GetInitializers(Type type, LogicalMethodInfo[] methodInfos)
at System.Web.Services.Protocols.HttpServerType..ctor(Type type)
at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocol.SetContext(Type type, HttpContext context, HttpRequest request, HttpResponse response)
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProc
Now this tells me it need reference to data.entity so i added still thinking to myself this is weird never had to do this and i am not return entity object i am returning the created onces but i did it. still the same error
then i saw that no matter what webmethod i select it does this i commented the webmethod out and made a helloworld and it worked.
I looked on google some people suggestthat you add
<add assembly="System.Data.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
to the webconfig i did and still same error. i am dumbfounded i do this sort of thing like daily and i never got a error like this. And the EF structure is nothing special 5 tables with foreignkeys.
i even deleted the WS/CL project and recreated it.
pls help
Found the problem...
I have in each POCO class this
namespace CL
{
public class Item
{
public static implicit operator Item(DB.Item db)
{
return new Item
{
Created = db.Created,
Id = db.ItemId
};
}
}
}
that basically converts the DB item into a POCO item.
So if i do this instead
namespace CL.DB
{
public partial class Item
{
public static implicit operator CL.Item(Item db)
{
return new CL.Item
{
Created = db.Created,
Id = db.ItemId
};
}
}
}
it works fine. WTF
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