dataset1.vb

适合VB初学者看

            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New OrdersDataTable
        End Function
        
        Friend Sub InitVars()
            Me.columnOrderID = Me.Columns("OrderID")
            Me.columnCustomerID = Me.Columns("CustomerID")
            Me.columnEmployeeID = Me.Columns("EmployeeID")
            Me.columnOrderDate = Me.Columns("OrderDate")
            Me.columnRequiredDate = Me.Columns("RequiredDate")
            Me.columnShippedDate = Me.Columns("ShippedDate")
            Me.columnShipVia = Me.Columns("ShipVia")
            Me.columnFreight = Me.Columns("Freight")
            Me.columnShipName = Me.Columns("ShipName")
            Me.columnShipAddress = Me.Columns("ShipAddress")
            Me.columnShipCity = Me.Columns("ShipCity")
            Me.columnShipRegion = Me.Columns("ShipRegion")
            Me.columnShipPostalCode = Me.Columns("ShipPostalCode")
            Me.columnShipCountry = Me.Columns("ShipCountry")
        End Sub
        
        Private Sub InitClass()
            Me.columnOrderID = New DataColumn("OrderID", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnOrderID)
            Me.columnCustomerID = New DataColumn("CustomerID", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnCustomerID)
            Me.columnEmployeeID = New DataColumn("EmployeeID", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnEmployeeID)
            Me.columnOrderDate = New DataColumn("OrderDate", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnOrderDate)
            Me.columnRequiredDate = New DataColumn("RequiredDate", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnRequiredDate)
            Me.columnShippedDate = New DataColumn("ShippedDate", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShippedDate)
            Me.columnShipVia = New DataColumn("ShipVia", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipVia)
            Me.columnFreight = New DataColumn("Freight", GetType(System.Decimal), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnFreight)
            Me.columnShipName = New DataColumn("ShipName", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipName)
            Me.columnShipAddress = New DataColumn("ShipAddress", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipAddress)
            Me.columnShipCity = New DataColumn("ShipCity", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipCity)
            Me.columnShipRegion = New DataColumn("ShipRegion", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipRegion)
            Me.columnShipPostalCode = New DataColumn("ShipPostalCode", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipPostalCode)
            Me.columnShipCountry = New DataColumn("ShipCountry", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnShipCountry)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.columnOrderID}, true))
            Me.columnOrderID.AutoIncrement = true
            Me.columnOrderID.AllowDBNull = false
            Me.columnOrderID.ReadOnly = true
            Me.columnOrderID.Unique = true
        End Sub
        
        Public Function NewOrdersRow() As OrdersRow
            Return CType(Me.NewRow,OrdersRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New OrdersRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(OrdersRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.OrdersRowChangedEvent) Is Nothing) Then
                RaiseEvent OrdersRowChanged(Me, New OrdersRowChangeEvent(CType(e.Row,OrdersRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.OrdersRowChangingEvent) Is Nothing) Then
                RaiseEvent OrdersRowChanging(Me, New OrdersRowChangeEvent(CType(e.Row,OrdersRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.OrdersRowDeletedEvent) Is Nothing) Then
                RaiseEvent OrdersRowDeleted(Me, New OrdersRowChangeEvent(CType(e.Row,OrdersRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.OrdersRowDeletingEvent) Is Nothing) Then
                RaiseEvent OrdersRowDeleting(Me, New OrdersRowChangeEvent(CType(e.Row,OrdersRow), e.Action))
            End If
        End Sub
        
        Public Sub RemoveOrdersRow(ByVal row As OrdersRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class OrdersRow
        Inherits DataRow
        
        Private tableOrders As OrdersDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tableOrders = CType(Me.Table,OrdersDataTable)
        End Sub
        
        Public Property OrderID As Integer
            Get
                Return CType(Me(Me.tableOrders.OrderIDColumn),Integer)
            End Get
            Set
                Me(Me.tableOrders.OrderIDColumn) = value
            End Set
        End Property
        
        Public Property CustomerID As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.CustomerIDColumn),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.tableOrders.CustomerIDColumn) = value
            End Set
        End Property
        
        Public Property EmployeeID As Integer
            Get
                Try 
                    Return CType(Me(Me.tableOrders.EmployeeIDColumn),Integer)
                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.tableOrders.EmployeeIDColumn) = value
            End Set
        End Property
        
        Public Property OrderDate As Date
            Get
                Try 
                    Return CType(Me(Me.tableOrders.OrderDateColumn),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.tableOrders.OrderDateColumn) = value
            End Set
        End Property
        
        Public Property RequiredDate As Date
            Get
                Try 
                    Return CType(Me(Me.tableOrders.RequiredDateColumn),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.tableOrders.RequiredDateColumn) = value
            End Set
        End Property
        
        Public Property ShippedDate As Date
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShippedDateColumn),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.tableOrders.ShippedDateColumn) = value
            End Set
        End Property
        
        Public Property ShipVia As Integer
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipViaColumn),Integer)
                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.tableOrders.ShipViaColumn) = value
            End Set
        End Property
        
        Public Property Freight As Decimal
            Get
                Try 
                    Return CType(Me(Me.tableOrders.FreightColumn),Decimal)
                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.tableOrders.FreightColumn) = value
            End Set
        End Property
        
        Public Property ShipName As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipNameColumn),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.tableOrders.ShipNameColumn) = value
            End Set
        End Property
        
        Public Property ShipAddress As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipAddressColumn),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.tableOrders.ShipAddressColumn) = value
            End Set
        End Property
        
        Public Property ShipCity As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipCityColumn),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.tableOrders.ShipCityColumn) = value
            End Set
        End Property
        
        Public Property ShipRegion As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipRegionColumn),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.tableOrders.ShipRegionColumn) = value
            End Set
        End Property
        
        Public Property ShipPostalCode As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipPostalCodeColumn),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.tableOrders.ShipPostalCodeColumn) = value
            End Set
        End Property
        
        Public Property ShipCountry As String
            Get
                Try 
                    Return CType(Me(Me.tableOrders.ShipCountryColumn),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.tableOrders.ShipCountryColumn) = value
            End Set
        End Property
        
        Public Function IsCustomerIDNull() As Boolean
            Return Me.IsNull(Me.tableOrders.CustomerIDColumn)
        End Function
        
        Public Sub SetCustomerIDNull()
            Me(Me.tableOrders.CustomerIDColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsEmployeeIDNull() As Boolean
            Return Me.IsNull(Me.tableOrders.EmployeeIDColumn)
        End Function
        
        Public Sub SetEmployeeIDNull()
            Me(Me.tableOrders.EmployeeIDColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsOrderDateNull() As Boolean
            Return Me.IsNull(Me.tableOrders.OrderDateColumn)
        End Function
        
        Public Sub SetOrderDateNull()
            Me(Me.tableOrders.OrderDateColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsRequiredDateNull() As Boolean
            Return Me.IsNull(Me.tableOrders.RequiredDateColumn)
        End Function
        
        Public Sub SetRequiredDateNull()
            Me(Me.tableOrders.RequiredDateColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsShippedDateNull() As Boolean
            Return Me.IsNull(Me.tableOrders.ShippedDateColumn)
        End Function
        
        Public Sub SetShippedDateNull()
            Me(Me.tableOrders.ShippedDateColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsShipViaNull() As Boolean
            Return Me.IsNull(Me.tableOrders.ShipViaColumn)
        End Function
        
        Public Sub SetShipViaNull()
            Me(Me.tableOrders.ShipViaColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsFreightNull() As Boolean
            Return Me.IsNull(Me.tableOrders.FreightColumn)
        End Function
        
        Public Sub SetFreightNull()
            Me(Me.tableOrders.FreightColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsShipNameNull() As Boolean
            Return Me.IsNull(Me.tableOrders.ShipNameColumn)
        End Function
        
        Public Sub SetShipNameNull()
            Me(Me.tableOrders.ShipNameColumn) = System.Convert.DBNull