dsproduct.vb

采用Visual Bacis.NET开发的电子商务系统.

        End Function

        Public Overrides Function Clone() As DataTable
            Dim cln As ProductsDataTable = CType(MyBase.Clone, ProductsDataTable)
            cln.InitVars()
            Return cln
        End Function

        Protected Overrides Function CreateInstance() As DataTable
            Return New ProductsDataTable()
        End Function

        Public Sub InitVars()
            Me.columnProductID = Me.Columns("ProductID")
            Me.columnSKU = Me.Columns("SKU")
            Me.columnProductType = Me.Columns("ProductType")
            Me.columnProductDate = Me.Columns("ProductDate")
            Me.columnProductName = Me.Columns("ProductName")
            Me.columnDescription = Me.Columns("Description")
            Me.columnProductSize = Me.Columns("ProductSize")
            Me.columnImageURL = Me.Columns("ImageURL")
            Me.columnUnitPrice = Me.Columns("UnitPrice")
            Me.columnOnSale = Me.Columns("OnSale")
        End Sub

        Private Sub InitClass()
            Me.columnProductID = New DataColumn("ProductID", GetType(System.Guid), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProductID)
            Me.columnSKU = New DataColumn("SKU", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnSKU)
            Me.columnProductType = New DataColumn("ProductType", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProductType)
            Me.columnProductDate = New DataColumn("ProductDate", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProductDate)
            Me.columnProductName = New DataColumn("ProductName", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProductName)
            Me.columnDescription = New DataColumn("Description", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnDescription)
            Me.columnProductSize = New DataColumn("ProductSize", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProductSize)
            Me.columnImageURL = New DataColumn("ImageURL", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnImageURL)
            Me.columnUnitPrice = New DataColumn("UnitPrice", GetType(System.Decimal), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnUnitPrice)
            Me.columnOnSale = New DataColumn("OnSale", GetType(System.Boolean), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnOnSale)
            Me.Constraints.Add(New UniqueConstraint("dsProductKey1", New DataColumn() {Me.columnProductID}, True))
            Me.columnProductID.AllowDBNull = False
            Me.columnProductID.Unique = True
            Me.columnSKU.AllowDBNull = False
            Me.columnProductName.AllowDBNull = False
            Me.columnDescription.AllowDBNull = False
            Me.columnUnitPrice.AllowDBNull = False
            Me.columnOnSale.AllowDBNull = False
        End Sub

        Public Function NewProductsRow() As ProductsRow
            Return CType(Me.NewRow, ProductsRow)
        End Function

        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New ProductsRow(builder)
        End Function

        Protected Overrides Function GetRowType() As System.Type
            Return GetType(ProductsRow)
        End Function

        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.ProductsRowChangedEvent) Is Nothing) Then
                RaiseEvent ProductsRowChanged(Me, New ProductsRowChangeEvent(CType(e.Row, ProductsRow), e.Action))
            End If
        End Sub

        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.ProductsRowChangingEvent) Is Nothing) Then
                RaiseEvent ProductsRowChanging(Me, New ProductsRowChangeEvent(CType(e.Row, ProductsRow), e.Action))
            End If
        End Sub

        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.ProductsRowDeletedEvent) Is Nothing) Then
                RaiseEvent ProductsRowDeleted(Me, New ProductsRowChangeEvent(CType(e.Row, ProductsRow), e.Action))
            End If
        End Sub

        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.ProductsRowDeletingEvent) Is Nothing) Then
                RaiseEvent ProductsRowDeleting(Me, New ProductsRowChangeEvent(CType(e.Row, ProductsRow), e.Action))
            End If
        End Sub

        Public Sub RemoveProductsRow(ByVal row As ProductsRow)
            Me.Rows.Remove(row)
        End Sub
    End Class

    <System.Diagnostics.DebuggerStepThrough()> _
    Public Class ProductsRow
        Inherits DataRow

        Private tableProducts As ProductsDataTable

        Public Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tableProducts = CType(Me.Table, ProductsDataTable)
        End Sub

        Public Property ProductID() As System.Guid
            Get
                Return CType(Me(Me.tableProducts.ProductIDColumn), System.Guid)
            End Get
            Set(ByVal Value As System.Guid)
                Me(Me.tableProducts.ProductIDColumn) = Value
            End Set
        End Property

        Public Property SKU() As String
            Get
                Return CType(Me(Me.tableProducts.SKUColumn), String)
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.SKUColumn) = Value
            End Set
        End Property

        Public Property ProductType() As String
            Get
                Try
                    Return CType(Me(Me.tableProducts.ProductTypeColumn), String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.ProductTypeColumn) = Value
            End Set
        End Property

        Public Property ProductDate() As Date
            Get
                Try
                    Return CType(Me(Me.tableProducts.ProductDateColumn), Date)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set(ByVal Value As Date)
                Me(Me.tableProducts.ProductDateColumn) = Value
            End Set
        End Property

        Public Property ProductName() As String
            Get
                Return CType(Me(Me.tableProducts.ProductNameColumn), String)
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.ProductNameColumn) = Value
            End Set
        End Property

        Public Property Description() As String
            Get
                Return CType(Me(Me.tableProducts.DescriptionColumn), String)
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.DescriptionColumn) = Value
            End Set
        End Property

        Public Property ProductSize() As String
            Get
                Try
                    Return CType(Me(Me.tableProducts.ProductSizeColumn), String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.ProductSizeColumn) = Value
            End Set
        End Property

        Public Property ImageURL() As String
            Get
                Try
                    Return CType(Me(Me.tableProducts.ImageURLColumn), String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("无法获取值，因为它是 DBNull。", e)
                End Try
            End Get
            Set(ByVal Value As String)
                Me(Me.tableProducts.ImageURLColumn) = Value
            End Set
        End Property

        Public Property UnitPrice() As Decimal
            Get
                Return CType(Me(Me.tableProducts.UnitPriceColumn), Decimal)
            End Get
            Set(ByVal Value As Decimal)
                Me(Me.tableProducts.UnitPriceColumn) = Value
            End Set
        End Property

        Public Property OnSale() As Boolean
            Get
                Return CType(Me(Me.tableProducts.OnSaleColumn), Boolean)
            End Get
            Set(ByVal Value As Boolean)
                Me(Me.tableProducts.OnSaleColumn) = Value
            End Set
        End Property

        Public Function IsProductTypeNull() As Boolean
            Return Me.IsNull(Me.tableProducts.ProductTypeColumn)
        End Function

        Public Sub SetProductTypeNull()
            Me(Me.tableProducts.ProductTypeColumn) = System.Convert.DBNull
        End Sub

        Public Function IsProductDateNull() As Boolean
            Return Me.IsNull(Me.tableProducts.ProductDateColumn)
        End Function

        Public Sub SetProductDateNull()
            Me(Me.tableProducts.ProductDateColumn) = System.Convert.DBNull
        End Sub

        Public Function IsProductSizeNull() As Boolean
            Return Me.IsNull(Me.tableProducts.ProductSizeColumn)
        End Function

        Public Sub SetProductSizeNull()
            Me(Me.tableProducts.ProductSizeColumn) = System.Convert.DBNull
        End Sub

        Public Function IsImageURLNull() As Boolean
            Return Me.IsNull(Me.tableProducts.ImageURLColumn)
        End Function

        Public Sub SetImageURLNull()
            Me(Me.tableProducts.ImageURLColumn) = System.Convert.DBNull
        End Sub
    End Class

    <System.Diagnostics.DebuggerStepThrough()> _
    Public Class ProductsRowChangeEvent
        Inherits EventArgs

        Private eventRow As ProductsRow

        Private eventAction As DataRowAction

        Public Sub New(ByVal row As ProductsRow, ByVal action As DataRowAction)
            MyBase.New()
            Me.eventRow = row
            Me.eventAction = action
        End Sub

        Public ReadOnly Property Row() As ProductsRow
            Get
                Return Me.eventRow
            End Get
        End Property

        Public ReadOnly Property Action() As DataRowAction
            Get
                Return Me.eventAction
            End Get
        End Property
    End Class
End Class