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How to: Define POCO Entities
The Entity Framework enables you to use your own custom data classes. For more information, see Working with POCO Entities. This topic defines a set of POCO types that are implicitly mapped, by having the same type and property names, to the data model that is defined in How to: Customize Modeling and Mapping Files to Work with Custom Objects. This model is based on the Contact, SalesOrderHeader, and SalesOrderDetail tables in the AdventureWorks database. For information on how to define a custom object context class, see How to: Define a Custom Object Context.
Example
This example defines the Contact, Order, LineItem, and OrderInfo custom data classes. These classes have been defined to support proxy object creation. For more information, see Requirements for Creating POCO Proxies.
Public Class LineItem
Private _SalesOrderID As Int32
Public Overridable Property SalesOrderID() As Int32
Get
Return _SalesOrderID
End Get
Set(ByVal value As Int32)
_SalesOrderID = value
End Set
End Property
Private _SalesOrderDetailID As Int32
Public Overridable Property SalesOrderDetailID() As Int32
Get
Return _SalesOrderDetailID
End Get
Set(ByVal value As Int32)
_SalesOrderDetailID = value
End Set
End Property
Private _CarrierTrackingNumber As String
Public Overridable Property CarrierTrackingNumber() As String
Get
Return _CarrierTrackingNumber
End Get
Set(ByVal value As String)
_CarrierTrackingNumber = value
End Set
End Property
Private _OrderQty As Int16
Public Overridable Property OrderQty() As Int16
Get
Return _OrderQty
End Get
Set(ByVal value As Int16)
_OrderQty = value
End Set
End Property
Private _ProductID As Int32
Public Overridable Property ProductID() As Int32
Get
Return _ProductID
End Get
Set(ByVal value As Int32)
_ProductID = value
End Set
End Property
Private _SpecialOfferID As Int32
Public Overridable Property SpecialOfferID() As Int32
Get
Return _SpecialOfferID
End Get
Set(ByVal value As Int32)
_SpecialOfferID = value
End Set
End Property
Private _UnitPrice As Decimal
Public Overridable Property UnitPrice() As Decimal
Get
Return _UnitPrice
End Get
Set(ByVal value As Decimal)
_UnitPrice = value
End Set
End Property
Private _UnitPriceDiscount As Decimal
Public Overridable Property UnitPriceDiscount() As Decimal
Get
Return _UnitPriceDiscount
End Get
Set(ByVal value As Decimal)
_UnitPriceDiscount = value
End Set
End Property
Private _LineTotal As Decimal
Public Overridable Property LineTotal() As Decimal
Get
Return _LineTotal
End Get
Set(ByVal value As Decimal)
_LineTotal = value
End Set
End Property
Private _rowguid As Guid
Public Overridable Property rowguid() As Guid
Get
Return _rowguid
End Get
Set(ByVal value As Guid)
_rowguid = value
End Set
End Property
Private _ModifiedDate As DateTime
Public Overridable Property ModifiedDate() As DateTime
Get
Return _ModifiedDate
End Get
Set(ByVal value As DateTime)
_ModifiedDate = value
End Set
End Property
' Defines a navigation property to the Order object.
Private _Order As Order
Public Overridable Property Order() As Order
Get
Return _Order
End Get
Set(ByVal value As Order)
_Order = value
End Set
End Property
End Class
Public Class Order
Private _SalesOrderID As Int32
Public Overridable Property SalesOrderID() As Int32
Get
Return _SalesOrderID
End Get
Set(ByVal value As Int32)
_SalesOrderID = value
End Set
End Property
Private _RevisionNumber As Byte
Public Overridable Property RevisionNumber() As Byte
Get
Return _RevisionNumber
End Get
Set(ByVal value As Byte)
_RevisionNumber = value
End Set
End Property
Private _OrderDate As DateTime
Public Overridable Property OrderDate() As DateTime
Get
Return _OrderDate
End Get
Set(ByVal value As DateTime)
_OrderDate = value
End Set
End Property
Private _DueDate As DateTime
Public Overridable Property DueDate() As DateTime
Get
Return _DueDate
End Get
Set(ByVal value As DateTime)
_DueDate = value
End Set
End Property
Private _ShipDate As Nullable(Of DateTime)
Public Overridable Property ShipDate() As Nullable(Of DateTime)
Get
Return _ShipDate
End Get
Set(ByVal value As Nullable(Of DateTime))
_ShipDate = value
End Set
End Property
Private _Status As Byte
Public Overridable Property Status() As Byte
Get
Return _Status
End Get
Set(ByVal value As Byte)
_Status = value
End Set
End Property
Private _OnlineOrderFlag As Boolean
Public Overridable Property OnlineOrderFlag() As Boolean
Get
Return _OnlineOrderFlag
End Get
Set(ByVal value As Boolean)
_OnlineOrderFlag = value
End Set
End Property
Private _SalesOrderNumber As String
Public Overridable Property SalesOrderNumber() As String
Get
Return _SalesOrderNumber
End Get
Set(ByVal value As String)
_SalesOrderNumber = value
End Set
End Property
Private _PurchaseOrderNumber As String
Public Overridable Property PurchaseOrderNumber() As String
Get
Return _PurchaseOrderNumber
End Get
Set(ByVal value As String)
_PurchaseOrderNumber = value
End Set
End Property
Private _AccountNumber As String
Public Overridable Property AccountNumber() As String
Get
Return _AccountNumber
End Get
Set(ByVal value As String)
_AccountNumber = value
End Set
End Property
Private _CustomerID As Int32
Public Overridable Property CustomerID() As Int32
Get
Return _CustomerID
End Get
Set(ByVal value As Int32)
_CustomerID = value
End Set
End Property
Private _ContactID As Int32
Public Overridable Property ContactID() As Int32
Get
Return _ContactID
End Get
Set(ByVal value As Int32)
_ContactID = value
End Set
End Property
Private _SalesPersonID As Nullable(Of Int32)
Public Overridable Property SalesPersonID() As Nullable(Of Int32)
Get
Return _SalesPersonID
End Get
Set(ByVal value As Nullable(Of Int32))
_SalesPersonID = value
End Set
End Property
Private _TerritoryID As Nullable(Of Int32)
Public Overridable Property TerritoryID() As Nullable(Of Int32)
Get
Return _TerritoryID
End Get
Set(ByVal value As Nullable(Of Int32))
_TerritoryID = value
End Set
End Property
Private _BillToAddressID As Int32
Public Overridable Property BillToAddressID() As Int32
Get
Return _BillToAddressID
End Get
Set(ByVal value As Int32)
_BillToAddressID = value
End Set
End Property
Private _ShipToAddressID As Int32
Public Overridable Property ShipToAddressID() As Int32
Get
Return _ShipToAddressID
End Get
Set(ByVal value As Int32)
_ShipToAddressID = value
End Set
End Property
Private _ShipMethodID As Int32
Public Overridable Property ShipMethodID() As Int32
Get
Return _ShipMethodID
End Get
Set(ByVal value As Int32)
_ShipMethodID = value
End Set
End Property
Private _CreditCardID As Nullable(Of Int32)
Public Overridable Property CreditCardID() As Nullable(Of Int32)
Get
Return _CreditCardID
End Get
Set(ByVal value As Nullable(Of Int32))
_CreditCardID = value
End Set
End Property
Private _CreditCardApprovalCode As String
Public Overridable Property CreditCardApprovalCode() As String
Get
Return _CreditCardApprovalCode
End Get
Set(ByVal value As String)
_CreditCardApprovalCode = value
End Set
End Property
Private _CurrencyRateID As Nullable(Of Int32)
Public Overridable Property CurrencyRateID() As Nullable(Of Int32)
Get
Return _CurrencyRateID
End Get
Set(ByVal value As Nullable(Of Int32))
_CurrencyRateID = value
End Set
End Property
Private _SubTotal As Decimal
Public Overridable Property SubTotal() As Decimal
Get
Return _SubTotal
End Get
Set(ByVal value As Decimal)
_SubTotal = value
End Set
End Property
Private _TaxAmt As Decimal
Public Overridable Property TaxAmt() As Decimal
Get
Return _TaxAmt
End Get
Set(ByVal value As Decimal)
_TaxAmt = value
End Set
End Property
Private _Freight As Decimal
Public Overridable Property Freight() As Decimal
Get
Return _Freight
End Get
Set(ByVal value As Decimal)
_Freight = value
End Set
End Property
Private _TotalDue As Decimal
Public Overridable Property TotalDue() As Decimal
Get
Return _TotalDue
End Get
Set(ByVal value As Decimal)
_TotalDue = value
End Set
End Property
Private _Comment As String
Public Overridable Property Comment() As String
Get
Return _Comment
End Get
Set(ByVal value As String)
_Comment = value
End Set
End Property
Private _rowguid As Guid
Public Overridable Property rowguid() As Guid
Get
Return _rowguid
End Get
Set(ByVal value As Guid)
_rowguid = value
End Set
End Property
Private _ModifiedDate As DateTime
Public Overridable Property ModifiedDate() As DateTime
Get
Return _ModifiedDate
End Get
Set(ByVal value As DateTime)
_ModifiedDate = value
End Set
End Property
Private _ExtendedInfo As OrderInfo
Public Overridable Property ExtendedInfo() As OrderInfo
Get
Return _ExtendedInfo
End Get
Set(ByVal value As OrderInfo)
_ExtendedInfo = value
End Set
End Property
' Defines a navigation property to the collection of LineItem objects.
Private _LineItems As ICollection(Of LineItem)
Public Overridable Property LineItems() As ICollection(Of LineItem)
Get
Return _LineItems
End Get
Set(ByVal value As ICollection(Of LineItem))
_LineItems = value
End Set
End Property
' Defines a navigation property to the Contact object.
Private _Contact As Contact
Public Overridable Property Contact() As Contact
Get
Return _Contact
End Get
Set(ByVal value As Contact)
_Contact = value
End Set
End Property
End Class
Public Class OrderInfo
Private _SalesOrderNumber As String
Public Property SalesOrderNumber() As String
Get
Return _SalesOrderNumber
End Get
Set(ByVal value As String)
_SalesOrderNumber = value
End Set
End Property
Private _PurchaseOrderNumber As String
Public Property PurchaseOrderNumber() As String
Get
Return _PurchaseOrderNumber
End Get
Set(ByVal value As String)
_PurchaseOrderNumber = value
End Set
End Property
Private _AccountNumber As String
Public Property AccountNumber() As String
Get
Return _AccountNumber
End Get
Set(ByVal value As String)
_AccountNumber = value
End Set
End Property
Private _Comment As String
Public Property Comment() As String
Get
Return _Comment
End Get
Set(ByVal value As String)
_Comment = value
End Set
End Property
End Class
Public Class Contact
Private _ContactID As Int32
Public Overridable Property ContactID() As Int32
Get
Return _ContactID
End Get
Set(ByVal value As Int32)
_ContactID = value
End Set
End Property
Private _NameStyle As Boolean
Public Overridable Property NameStyle() As Boolean
Get
Return _NameStyle
End Get
Set(ByVal value As Boolean)
_NameStyle = value
End Set
End Property
Private _Title As String
Public Overridable Property Title() As String
Get
Return _Title
End Get
Set(ByVal value As String)
_Title = value
End Set
End Property
Private _FirstName As String
Public Overridable Property FirstName() As String
Get
Return _FirstName
End Get
Set(ByVal value As String)
_FirstName = value
End Set
End Property
Private _MiddleName As String
Public Overridable Property MiddleName() As String
Get
Return _MiddleName
End Get
Set(ByVal value As String)
_MiddleName = value
End Set
End Property
Private _LastName As String
Public Overridable Property LastName() As String
Get
Return _LastName
End Get
Set(ByVal value As String)
_LastName = value
End Set
End Property
Private _Suffix As String
Public Overridable Property Suffix() As String
Get
Return _Suffix
End Get
Set(ByVal value As String)
_Suffix = value
End Set
End Property
Private _EmailAddress As String
Public Overridable Property EmailAddress() As String
Get
Return _EmailAddress
End Get
Set(ByVal value As String)
_EmailAddress = value
End Set
End Property
Private _EmailPromotion As Int32
Public Overridable Property EmailPromotion() As Int32
Get
Return _EmailPromotion
End Get
Set(ByVal value As Int32)
_EmailPromotion = value
End Set
End Property
Private _Phone As String
Public Overridable Property Phone() As String
Get
Return _Phone
End Get
Set(ByVal value As String)
_Phone = value
End Set
End Property
Private _PasswordHash As String
Public Overridable Property PasswordHash() As String
Get
Return _PasswordHash
End Get
Set(ByVal value As String)
_PasswordHash = value
End Set
End Property
Private _PasswordSalt As String
Public Overridable Property PasswordSalt() As String
Get
Return _PasswordSalt
End Get
Set(ByVal value As String)
_PasswordSalt = value
End Set
End Property
Private _AdditionalContactInfo As String
Public Overridable Property AdditionalContactInfo() As String
Get
Return _AdditionalContactInfo
End Get
Set(ByVal value As String)
_AdditionalContactInfo = value
End Set
End Property
Private _rowguid As Guid
Public Overridable Property rowguid() As Guid
Get
Return _rowguid
End Get
Set(ByVal value As Guid)
_rowguid = value
End Set
End Property
Private _ModifiedDate As DateTime
Public Overridable Property ModifiedDate() As DateTime
Get
Return _ModifiedDate
End Get
Set(ByVal value As DateTime)
_ModifiedDate = value
End Set
End Property
' Defines a navigation property to the collection of Order objects.
Private _Orders As ICollection(Of Order)
Public Overridable Property Orders() As ICollection(Of Order)
Get
Return _Orders
End Get
Set(ByVal value As ICollection(Of Order))
_Orders = value
End Set
End Property
End Class
public class LineItem
{
public virtual Int32 SalesOrderID { get; set; }
public virtual Int32 SalesOrderDetailID { get; set; }
public virtual String CarrierTrackingNumber { get; set; }
public virtual Int16 OrderQty { get; set; }
public virtual Int32 ProductID { get; set; }
public virtual Int32 SpecialOfferID { get; set; }
public virtual Decimal UnitPrice { get; set; }
public virtual Decimal UnitPriceDiscount { get; set; }
public virtual Decimal LineTotal { get; set; }
public virtual Guid rowguid { get; set; }
public virtual DateTime ModifiedDate { get; set; }
// Defines a navigation property to the Order object.
public virtual Order Order { get; set; }
}
public class Order
{
public virtual Int32 SalesOrderID { get; set; }
public virtual Byte RevisionNumber { get; set; }
public virtual DateTime OrderDate { get; set; }
public virtual DateTime DueDate { get; set; }
public virtual Nullable<DateTime> ShipDate { get; set; }
public virtual Byte Status { get; set; }
public virtual Boolean OnlineOrderFlag { get; set; }
public virtual String SalesOrderNumber { get; set; }
public virtual String PurchaseOrderNumber { get; set; }
public virtual String AccountNumber { get; set; }
public virtual Int32 CustomerID { get; set; }
public virtual Int32 ContactID { get; set; }
public virtual Nullable<Int32> SalesPersonID { get; set; }
public virtual Nullable<Int32> TerritoryID { get; set; }
public virtual Int32 BillToAddressID { get; set; }
public virtual Int32 ShipToAddressID { get; set; }
public virtual Int32 ShipMethodID { get; set; }
public virtual Nullable<Int32> CreditCardID { get; set; }
public virtual String CreditCardApprovalCode { get; set; }
public virtual Nullable<Int32> CurrencyRateID { get; set; }
public virtual Decimal SubTotal { get; set; }
public virtual Decimal TaxAmt { get; set; }
public virtual Decimal Freight { get; set; }
public virtual Decimal TotalDue { get; set; }
public virtual String Comment { get; set; }
public virtual Guid rowguid { get; set; }
public virtual DateTime ModifiedDate { get; set; }
public virtual OrderInfo ExtendedInfo { get; set; }
// Defines a navigation property to the collection of LineItem objects.
public virtual ICollection<LineItem> LineItems { get; set; }
// Defines a navigation property to the Contact object.
public virtual Contact Contact { get; set; }
}
public class OrderInfo
{
public string SalesOrderNumber { get; set; }
public string PurchaseOrderNumber { get; set; }
public string AccountNumber { get; set; }
public string Comment { get; set; }
}
public class Contact
{
public virtual Int32 ContactID { get; set; }
public virtual Boolean NameStyle { get; set; }
public virtual String Title { get; set; }
public virtual String FirstName { get; set; }
public virtual String MiddleName { get; set; }
public virtual String LastName { get; set; }
public virtual String Suffix { get; set; }
public virtual String EmailAddress { get; set; }
public virtual Int32 EmailPromotion { get; set; }
public virtual String Phone { get; set; }
public virtual String PasswordHash { get; set; }
public virtual String PasswordSalt { get; set; }
public virtual String AdditionalContactInfo { get; set; }
public virtual Guid rowguid { get; set; }
public virtual DateTime ModifiedDate { get; set; }
// Defines a navigation property to the collection of Order objects.
public virtual ICollection<Order> Orders { get; set; }
}