dataset1.vb

用vb.net写的基于c/s结构的进销存程序设计源代码

        Public ReadOnly Property Action As DataRowAction
            Get
                Return Me.eventAction
            End Get
        End Property
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class OrdersDataTable
        Inherits DataTable
        Implements System.Collections.IEnumerable
        
        Private columnOrderID As DataColumn
        
        Private columnOrderDate As DataColumn
        
        Private columnCustomerID As DataColumn
        
        Private columnSubTotal As DataColumn
        
        Private columnTax As DataColumn
        
        Private columnAmount As DataColumn
        
        Friend Sub New()
            MyBase.New("Orders")
            Me.InitClass
        End Sub
        
        Friend Sub New(ByVal table As DataTable)
            MyBase.New(table.TableName)
            If (table.CaseSensitive <> table.DataSet.CaseSensitive) Then
                Me.CaseSensitive = table.CaseSensitive
            End If
            If (table.Locale.ToString <> table.DataSet.Locale.ToString) Then
                Me.Locale = table.Locale
            End If
            If (table.Namespace <> table.DataSet.Namespace) Then
                Me.Namespace = table.Namespace
            End If
            Me.Prefix = table.Prefix
            Me.MinimumCapacity = table.MinimumCapacity
            Me.DisplayExpression = table.DisplayExpression
        End Sub
        
        <System.ComponentModel.Browsable(false)>  _
        Public ReadOnly Property Count As Integer
            Get
                Return Me.Rows.Count
            End Get
        End Property
        
        Friend ReadOnly Property OrderIDColumn As DataColumn
            Get
                Return Me.columnOrderID
            End Get
        End Property
        
        Friend ReadOnly Property OrderDateColumn As DataColumn
            Get
                Return Me.columnOrderDate
            End Get
        End Property
        
        Friend ReadOnly Property CustomerIDColumn As DataColumn
            Get
                Return Me.columnCustomerID
            End Get
        End Property
        
        Friend ReadOnly Property SubTotalColumn As DataColumn
            Get
                Return Me.columnSubTotal
            End Get
        End Property
        
        Friend ReadOnly Property TaxColumn As DataColumn
            Get
                Return Me.columnTax
            End Get
        End Property
        
        Friend ReadOnly Property AmountColumn As DataColumn
            Get
                Return Me.columnAmount
            End Get
        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As OrdersRow
            Get
                Return CType(Me.Rows(index),OrdersRow)
            End Get
        End Property
        
        Public Event OrdersRowChanged As OrdersRowChangeEventHandler
        
        Public Event OrdersRowChanging As OrdersRowChangeEventHandler
        
        Public Event OrdersRowDeleted As OrdersRowChangeEventHandler
        
        Public Event OrdersRowDeleting As OrdersRowChangeEventHandler
        
        Public Overloads Sub AddOrdersRow(ByVal row As OrdersRow)
            Me.Rows.Add(row)
        End Sub
        
        Public Overloads Function AddOrdersRow(ByVal OrderID As String, ByVal OrderDate As Date, ByVal CustomerID As String, ByVal SubTotal As Integer, ByVal Tax As Integer, ByVal Amount As Integer) As OrdersRow
            Dim rowOrdersRow As OrdersRow = CType(Me.NewRow,OrdersRow)
            rowOrdersRow.ItemArray = New Object() {OrderID, OrderDate, CustomerID, SubTotal, Tax, Amount}
            Me.Rows.Add(rowOrdersRow)
            Return rowOrdersRow
        End Function
        
        Public Function FindByOrderID(ByVal OrderID As String) As OrdersRow
            Return CType(Me.Rows.Find(New Object() {OrderID}),OrdersRow)
        End Function
        
        Public Function GetEnumerator() As System.Collections.IEnumerator Implements System.Collections.IEnumerable.GetEnumerator
            Return Me.Rows.GetEnumerator
        End Function
        
        Public Overrides Function Clone() As DataTable
            Dim cln As OrdersDataTable = CType(MyBase.Clone,OrdersDataTable)
            cln.InitVars
            Return cln
        End Function
        
        Friend Sub InitVars()
            Me.columnOrderID = Me.Columns("OrderID")
            Me.columnOrderDate = Me.Columns("OrderDate")
            Me.columnCustomerID = Me.Columns("CustomerID")
            Me.columnSubTotal = Me.Columns("SubTotal")
            Me.columnTax = Me.Columns("Tax")
            Me.columnAmount = Me.Columns("Amount")
        End Sub
        
        Private Sub InitClass()
            Me.columnOrderID = New DataColumn("OrderID", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnOrderID)
            Me.columnOrderDate = New DataColumn("OrderDate", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnOrderDate)
            Me.columnCustomerID = New DataColumn("CustomerID", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnCustomerID)
            Me.columnSubTotal = New DataColumn("SubTotal", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnSubTotal)
            Me.columnTax = New DataColumn("Tax", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnTax)
            Me.columnAmount = New DataColumn("Amount", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnAmount)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.columnOrderID}, true))
            Me.columnOrderID.AllowDBNull = false
            Me.columnOrderID.Unique = true
            Me.columnOrderDate.AllowDBNull = false
        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 String
            Get
                Return CType(Me(Me.tableOrders.OrderIDColumn),String)
            End Get
            Set
                Me(Me.tableOrders.OrderIDColumn) = value
            End Set
        End Property
        
        Public Property OrderDate As Date
            Get
                Return CType(Me(Me.tableOrders.OrderDateColumn),Date)
            End Get
            Set
                Me(Me.tableOrders.OrderDateColumn) = 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("無法取得值，因為它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableOrders.CustomerIDColumn) = value
            End Set
        End Property
        
        Public Property SubTotal As Integer
            Get
                Try 
                    Return CType(Me(Me.tableOrders.SubTotalColumn),Integer)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("無法取得值，因為它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableOrders.SubTotalColumn) = value
            End Set
        End Property
        
        Public Property Tax As Integer
            Get
                Try 
                    Return CType(Me(Me.tableOrders.TaxColumn),Integer)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("無法取得值，因為它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableOrders.TaxColumn) = value
            End Set
        End Property
        
        Public Property Amount As Integer
            Get
                Try 
                    Return CType(Me(Me.tableOrders.AmountColumn),Integer)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("無法取得值，因為它是 DBNull。", e)
                End Try
            End Get
            Set
                Me(Me.tableOrders.AmountColumn) = 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 IsSubTotalNull() As Boolean
            Return Me.IsNull(Me.tableOrders.SubTotalColumn)
        End Function
        
        Public Sub SetSubTotalNull()
            Me(Me.tableOrders.SubTotalColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsTaxNull() As Boolean
            Return Me.IsNull(Me.tableOrders.TaxColumn)
        End Function
        
        Public Sub SetTaxNull()
            Me(Me.tableOrders.TaxColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsAmountNull() As Boolean
            Return Me.IsNull(Me.tableOrders.AmountColumn)
        End Function
        
        Public Sub SetAmountNull()
            Me(Me.tableOrders.AmountColumn) = System.Convert.DBNull
        End Sub
        
        Public Function GetOrderDetailsRows() As OrderDetailsRow()
            Return CType(Me.GetChildRows(Me.Table.ChildRelations("OrdersOrderDetails")),OrderDetailsRow())
        End Function
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class OrdersRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As OrdersRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As OrdersRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As OrdersRow
            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