_orderdetails.vb

EasyObjects 是ORM的典型应用的例子是学习研究的很好的范例

			End Get
			Set(ByVal Value As String)
				If String.Empty = value Then
					Me.SetColumnNull(OrderDetailsSchema.ProductID.FieldName)
				Else
					Me.ProductID = MyBase.SetIntegerAsString(OrderDetailsSchema.ProductID.FieldName, Value)
				End If
			End Set
		End Property

		Public Overridable Property s_UnitPrice As String
			Get
				If Me.IsColumnNull(OrderDetailsSchema.UnitPrice.FieldName) Then
					Return String.Empty
				Else
					Return MyBase.GetDecimalAsString(OrderDetailsSchema.UnitPrice.FieldName)
				End If
			End Get
			Set(ByVal Value As String)
				If String.Empty = value Then
					Me.SetColumnNull(OrderDetailsSchema.UnitPrice.FieldName)
				Else
					Me.UnitPrice = MyBase.SetDecimalAsString(OrderDetailsSchema.UnitPrice.FieldName, Value)
				End If
			End Set
		End Property

		Public Overridable Property s_Quantity As String
			Get
				If Me.IsColumnNull(OrderDetailsSchema.Quantity.FieldName) Then
					Return String.Empty
				Else
					Return MyBase.GetShortAsString(OrderDetailsSchema.Quantity.FieldName)
				End If
			End Get
			Set(ByVal Value As String)
				If String.Empty = value Then
					Me.SetColumnNull(OrderDetailsSchema.Quantity.FieldName)
				Else
					Me.Quantity = MyBase.SetShortAsString(OrderDetailsSchema.Quantity.FieldName, Value)
				End If
			End Set
		End Property

		Public Overridable Property s_Discount As String
			Get
				If Me.IsColumnNull(OrderDetailsSchema.Discount.FieldName) Then
					Return String.Empty
				Else
					Return MyBase.GetSingleAsString(OrderDetailsSchema.Discount.FieldName)
				End If
			End Get
			Set(ByVal Value As String)
				If String.Empty = value Then
					Me.SetColumnNull(OrderDetailsSchema.Discount.FieldName)
				Else
					Me.Discount = MyBase.SetSingleAsString(OrderDetailsSchema.Discount.FieldName, Value)
				End If
			End Set
		End Property


#End Region

#Region " Where Clause "
    Public Class WhereClause

        Public Sub New(ByVal entity As EasyObject)
            Me._entity = entity
        End Sub
		
		Public ReadOnly Property TearOff As TearOffWhereParameter
			Get
				If _tearOff Is Nothing Then
					_tearOff = new TearOffWhereParameter(Me)
				End If

				Return _tearOff
			End Get
		End Property

		#Region " TearOff's "
		Public class TearOffWhereParameter
		
			Private _clause as WhereClause
			
			Public Sub New(ByVal clause As WhereClause)
				Me._clause = clause
			End Sub

			Public ReadOnly Property OrderID() As WhereParameter
				Get
					Dim wp As WhereParameter = New WhereParameter(OrderDetailsSchema.OrderID)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddWhereParameter(wp)
					Return wp
				End Get
			End Property

			Public ReadOnly Property ProductID() As WhereParameter
				Get
					Dim wp As WhereParameter = New WhereParameter(OrderDetailsSchema.ProductID)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddWhereParameter(wp)
					Return wp
				End Get
			End Property

			Public ReadOnly Property UnitPrice() As WhereParameter
				Get
					Dim wp As WhereParameter = New WhereParameter(OrderDetailsSchema.UnitPrice)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddWhereParameter(wp)
					Return wp
				End Get
			End Property

			Public ReadOnly Property Quantity() As WhereParameter
				Get
					Dim wp As WhereParameter = New WhereParameter(OrderDetailsSchema.Quantity)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddWhereParameter(wp)
					Return wp
				End Get
			End Property

			Public ReadOnly Property Discount() As WhereParameter
				Get
					Dim wp As WhereParameter = New WhereParameter(OrderDetailsSchema.Discount)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddWhereParameter(wp)
					Return wp
				End Get
			End Property

	End Class
	
	#End Region	

		Public ReadOnly Property OrderID() As WhereParameter 
			Get
				If _OrderID_W Is Nothing Then
					_OrderID_W = TearOff.OrderID
				End If
				Return _OrderID_W
			End Get
		End Property

		Public ReadOnly Property ProductID() As WhereParameter 
			Get
				If _ProductID_W Is Nothing Then
					_ProductID_W = TearOff.ProductID
				End If
				Return _ProductID_W
			End Get
		End Property

		Public ReadOnly Property UnitPrice() As WhereParameter 
			Get
				If _UnitPrice_W Is Nothing Then
					_UnitPrice_W = TearOff.UnitPrice
				End If
				Return _UnitPrice_W
			End Get
		End Property

		Public ReadOnly Property Quantity() As WhereParameter 
			Get
				If _Quantity_W Is Nothing Then
					_Quantity_W = TearOff.Quantity
				End If
				Return _Quantity_W
			End Get
		End Property

		Public ReadOnly Property Discount() As WhereParameter 
			Get
				If _Discount_W Is Nothing Then
					_Discount_W = TearOff.Discount
				End If
				Return _Discount_W
			End Get
		End Property

		Private _OrderID_W As WhereParameter = Nothing
		Private _ProductID_W As WhereParameter = Nothing
		Private _UnitPrice_W As WhereParameter = Nothing
		Private _Quantity_W As WhereParameter = Nothing
		Private _Discount_W As WhereParameter = Nothing

		Public Sub WhereClauseReset()

		_OrderID_W = Nothing
		_ProductID_W = Nothing
		_UnitPrice_W = Nothing
		_Quantity_W = Nothing
		_Discount_W = Nothing
			Me._entity.Query.FlushWhereParameters()

		End Sub
	
		Private _entity As EasyObject
		Private _tearOff As TearOffWhereParameter
    End Class	

	Public ReadOnly Property Where() As WhereClause
		Get
			If _whereClause Is Nothing Then
				_whereClause = New WhereClause(Me)
			End If
	
			Return _whereClause
		End Get
	End Property
	
	Private _whereClause As WhereClause = Nothing	
#End Region	

#Region " Aggregate Clause "
    Public Class AggregateClause

        Public Sub New(ByVal entity As EasyObject)
            Me._entity = entity
        End Sub
		
		Public ReadOnly Property TearOff As TearOffAggregateParameter
			Get
				If _tearOff Is Nothing Then
					_tearOff = new TearOffAggregateParameter(Me)
				End If

				Return _tearOff
			End Get
		End Property

		#Region " TearOff's "
		Public class TearOffAggregateParameter
		
			Private _clause as AggregateClause
			
			Public Sub New(ByVal clause As AggregateClause)
				Me._clause = clause
			End Sub

			Public ReadOnly Property OrderID() As AggregateParameter
				Get
					Dim ap As AggregateParameter = New AggregateParameter(OrderDetailsSchema.OrderID)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddAggregateParameter(ap)
					Return ap
				End Get
			End Property

			Public ReadOnly Property ProductID() As AggregateParameter
				Get
					Dim ap As AggregateParameter = New AggregateParameter(OrderDetailsSchema.ProductID)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddAggregateParameter(ap)
					Return ap
				End Get
			End Property

			Public ReadOnly Property UnitPrice() As AggregateParameter
				Get
					Dim ap As AggregateParameter = New AggregateParameter(OrderDetailsSchema.UnitPrice)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddAggregateParameter(ap)
					Return ap
				End Get
			End Property

			Public ReadOnly Property Quantity() As AggregateParameter
				Get
					Dim ap As AggregateParameter = New AggregateParameter(OrderDetailsSchema.Quantity)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddAggregateParameter(ap)
					Return ap
				End Get
			End Property

			Public ReadOnly Property Discount() As AggregateParameter
				Get
					Dim ap As AggregateParameter = New AggregateParameter(OrderDetailsSchema.Discount)
                    Dim query As NCI.EasyObjects.DynamicQuery = Me._clause._entity.Query
                    query.AddAggregateParameter(ap)
					Return ap
				End Get
			End Property

	End Class
	
	#End Region	

		Public ReadOnly Property OrderID() As AggregateParameter 
			Get
				If _OrderID_W Is Nothing Then
					_OrderID_W = TearOff.OrderID
				End If
				Return _OrderID_W
			End Get
		End Property

		Public ReadOnly Property ProductID() As AggregateParameter 
			Get
				If _ProductID_W Is Nothing Then
					_ProductID_W = TearOff.ProductID
				End If
				Return _ProductID_W
			End Get
		End Property

		Public ReadOnly Property UnitPrice() As AggregateParameter 
			Get
				If _UnitPrice_W Is Nothing Then
					_UnitPrice_W = TearOff.UnitPrice
				End If
				Return _UnitPrice_W
			End Get
		End Property

		Public ReadOnly Property Quantity() As AggregateParameter 
			Get
				If _Quantity_W Is Nothing Then
					_Quantity_W = TearOff.Quantity
				End If
				Return _Quantity_W
			End Get
		End Property

		Public ReadOnly Property Discount() As AggregateParameter 
			Get
				If _Discount_W Is Nothing Then
					_Discount_W = TearOff.Discount
				End If
				Return _Discount_W
			End Get
		End Property

		Private _OrderID_W As AggregateParameter = Nothing
		Private _ProductID_W As AggregateParameter = Nothing
		Private _UnitPrice_W As AggregateParameter = Nothing
		Private _Quantity_W As AggregateParameter = Nothing
		Private _Discount_W As AggregateParameter = Nothing

		Public Sub AggregateClauseReset()

		_OrderID_W = Nothing
		_ProductID_W = Nothing
		_UnitPrice_W = Nothing
		_Quantity_W = Nothing
		_Discount_W = Nothing
			Me._entity.Query.FlushAggregateParameters()

		End Sub
	
		Private _entity As EasyObject
		Private _tearOff As TearOffAggregateParameter
    End Class	

	Public ReadOnly Property Aggregate() As AggregateClause
		Get
			If _aggregateClause Is Nothing Then
				_aggregateClause = New AggregateClause(Me)
			End If
	
			Return _aggregateClause
		End Get
	End Property
	
	Private _aggregateClause As AggregateClause = Nothing	
#End Region	

End Class