Question

I would like to know how to add a property to an entity object from my model.

[EdmEntityTypeAttribute(NamespaceName="MyObjectModel", Name="MyObject")]
    [Serializable()]
    [DataContractAttribute(IsReference=true)]
    public partial class MyObject: EntityObject
{
private int myVar;

        public int MyProperty
        {
            get { return myVar; }
            set { myVar = value; }
        }
}

When I do this, the new property doesn’t appear in MyObject but i don’t get any error.

How should I proceed to do this ?

Thanks !

Answer 1

As I see the EdmEntityTypeAttribute attribute, I assume you’re modifying the Databasemodel.Designer.cs file. As the header of this file says:

// <auto-generated>
//    This code was generated from a template.
//
//    Manual changes to this file may cause unexpected behavior in your application.
//    Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>

this file is auto-generated and must never be manually modified. So your property is basically removed when this file is re-generated (probably on compilation).

Just create a new file to add your property:

For example, MyObject.cs:

public partial class MyObject
{
    public int MyProperty { get; set; }
}

Do note that the partial keyword is designed to allow separating the definition of a class in multiple files.