EF 4 how to add partial classes

Question

I needed to extend the partial EF classes because I want to add some functionality to the possibility of using Oracle sequences, however I really don’t know how to use this part of the partial class, I made a separate .cs file and the name is one of my automatically generated classes as follows:

namespace GlassStoreDAL { public partial class CAR { private int _sequences; public int sequences { get { return _sequences; } set { _sequences = value; } } } } 

Now I assumed that on my BLL, which refers to GlassStoreDAL, I can find my “sequences” property, but apparently something went wrong, I would appreciate any help here.

Here is my generated incomplete class, should I have the sequence property also there?

 [EdmEntityTypeAttribute(NamespaceName="Model", Name="CAR")] [Serializable()] [DataContractAttribute(IsReference=true)] public partial class CAR : EntityObject { #region Factory Method /// <summary> /// Create a new CAR object. /// </summary> /// <param name="id">Initial value of the ID property.</param> public static CAR CreateCAR(global::System.Decimal id) { CAR cAR = new CAR(); cAR.ID = id; return cAR; } #endregion #region Primitive Properties /// <summary> /// No Metadata Documentation available. /// </summary> [EdmScalarPropertyAttribute(EntityKeyProperty=true, IsNullable=false)] [DataMemberAttribute()] public global::System.Decimal ID { get { return _ID; } set { if (_ID != value) { OnIDChanging(value); ReportPropertyChanging("ID"); _ID = StructuralObject.SetValidValue(value); ReportPropertyChanged("ID"); OnIDChanged(); } } } private global::System.Decimal _ID; partial void OnIDChanging(global::System.Decimal value); partial void OnIDChanged(); /// <summary> /// No Metadata Documentation available. /// </summary> [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)] [DataMemberAttribute()] public global::System.String NAME { get { return _NAME; } set { OnNAMEChanging(value); ReportPropertyChanging("NAME"); _NAME = StructuralObject.SetValidValue(value, true); ReportPropertyChanged("NAME"); OnNAMEChanged(); } } private global::System.String _NAME; partial void OnNAMEChanging(global::System.String value); partial void OnNAMEChanged(); /// <summary> /// No Metadata Documentation available. /// </summary> [EdmScalarPropertyAttribute(EntityKeyProperty=false, IsNullable=true)] [DataMemberAttribute()] public global::System.String MODEL { get { return _MODEL; } set { OnMODELChanging(value); ReportPropertyChanging("MODEL"); _MODEL = StructuralObject.SetValidValue(value, true); ReportPropertyChanged("MODEL"); OnMODELChanged(); } } private global::System.String _MODEL; partial void OnMODELChanging(global::System.String value); partial void OnMODELChanged(); #endregion #region Navigation Properties /// <summary> /// No Metadata Documentation available. /// </summary> [XmlIgnoreAttribute()] [SoapIgnoreAttribute()] [DataMemberAttribute()] [EdmRelationshipNavigationPropertyAttribute("Model", "SYS_C009618", "GLASS")] public EntityCollection<GLASS> GLASSes { get { return ((IEntityWithRelationships)this).RelationshipManager. GetRelatedCollection<GLASS>("Model.SYS_C009618", "GLASS"); } set { if ((value != null)) { ((IEntityWithRelationships)this).RelationshipManager. InitializeRelatedCollection<GLASS>("Model.SYS_C009618", "GLASS", value); } } } #endregion } 

Answer 1

To summarize the big comment next ...

Ensure that partial elements are attached together correctly:

• Ensure that both class definitions are in the same namespace and assembly.
• Make sure that at least one of them is declared as partial (most of the generated classes, including those created by EF).
• Ensure that the newly created partial item can see the previous items to confirm that the partial files match.

If the client is in a different binary format (what was here)

• Make sure the client project is executing binary / links up to date (perform a clean build / delete a binary copy / recreate the link), depending on the situation of your project.

In this case, the last check was the most important and solved the problem.

Answer 2

You must ensure that:

 public partial class CAR { private int _sequences; public int sequences { get { return _sequences; } set { _sequences = value; } } } 

In the created EF class, you need to:

 public partial class CAR { } 

• Add a partial keyword to the class generated by EF.
• Make sure they are in the same namespace.

Answer 3

Create a new class in a separate file in the same assembly (although it does not have to be the same assembly) and make sure that it has the same namespace.

If they are in the same assembly and namespace, you should have no problem. You will find out that everything turned out right when the new partial element you created can see the properties and methods of the generated EF class in the drop-down list at the top of the source code editor.