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Entity Framework structured / overloaded constructors?

I saw similar questions, but they are not quite what I mean (or maybe they are, and I do not understand the answers)

In my previous application using Linq2SQL, I was able to overload the constructors with parameters by doing the following:

Namespace CoreDb    
  Partial Public Class Accomplishment

    Public Sub New(ByVal accomplishmentTypeID As Object, ByVal description As String, ByVal title As String, ByVal applicableDate As DateTime, ByVal lastUpdatedBy As String)
        Me.New()

        If TypeOf (accomplishmentTypeID) Is Guid Then
            Me.AccomplishmentTypeId = accomplishmentTypeID
        End If

        If TypeOf (accomplishmentTypeID) Is String Then
            Me.AccomplishmentTypeId = New Guid(accomplishmentTypeID.ToString())
        End If

        Me.Description = description
        Me.ApplicableDate = applicableDate
        Me.Title = title
        Me.Id = Guid.NewGuid()
        Me.DateCreated = DateTime.Now
        Me.DateModified = DateTime.Now
        Me.LastUpdatedBy = lastUpdatedBy
        Me.CreatedBy = lastUpdatedBy
    End Sub
 End Class
End Namespace

Basically, using a partial class for an object, splitting the namespace of the .dbml file and calling the default constructor, and then performing additional actions.

So then in my code I could do something like:

Dim accomplishment As New Accomplishment(id, description, title, applicableDate, lastUpdatedBy)

This does not seem to work in the Entity Framework anymore, since the default constructor does not exist.

Is it really not working anymore? And if so, what is a good alternative to implementing something like that?

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2

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+9

EF , , , , . , :

Public Class Customer

  ' only usable by EF
  Private Sub New()
  End Sub

  ' what you or your class consumers will use
  Public Sub New(firstName As String, lastName As String)
      Me.New()
      ' assign properties, etc.
  End Sub

  ' etc.

End Class
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