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
        
        Friend 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.columnProductID.AllowDBNull = false
            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
        
        Friend 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
                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
                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
                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
                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
                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
                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
                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
                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
                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
                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