dataset4.vb

vb。net 2003数据库设计整套源代码

            Get
                Return Me.columnprice
            End Get
        End Property
        
        Friend ReadOnly Property standColumn As DataColumn
            Get
                Return Me.columnstand
            End Get
        End Property
        
        Friend ReadOnly Property anountColumn As DataColumn
            Get
                Return Me.columnanount
            End Get
        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As storeRow
            Get
                Return CType(Me.Rows(index),storeRow)
            End Get
        End Property
        
        Public Event storeRowChanged As storeRowChangeEventHandler
        
        Public Event storeRowChanging As storeRowChangeEventHandler
        
        Public Event storeRowDeleted As storeRowChangeEventHandler
        
        Public Event storeRowDeleting As storeRowChangeEventHandler
        
        Public Overloads Sub AddstoreRow(ByVal row As storeRow)
            Me.Rows.Add(row)
        End Sub
        
        Public Overloads Function AddstoreRow(ByVal aname As String, ByVal ano As String, ByVal descript As String, ByVal price As Decimal, ByVal stand As String, ByVal anount As Integer) As storeRow
            Dim rowstoreRow As storeRow = CType(Me.NewRow,storeRow)
            rowstoreRow.ItemArray = New Object() {aname, ano, descript, price, stand, anount}
            Me.Rows.Add(rowstoreRow)
            Return rowstoreRow
        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 storeDataTable = CType(MyBase.Clone,storeDataTable)
            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New storeDataTable
        End Function
        
        Friend Sub InitVars()
            Me.columnaname = Me.Columns("aname")
            Me.columnano = Me.Columns("ano")
            Me.columndescript = Me.Columns("descript")
            Me.columnprice = Me.Columns("price")
            Me.columnstand = Me.Columns("stand")
            Me.columnanount = Me.Columns("anount")
        End Sub
        
        Private Sub InitClass()
            Me.columnaname = New DataColumn("aname", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnaname)
            Me.columnano = New DataColumn("ano", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnano)
            Me.columndescript = New DataColumn("descript", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columndescript)
            Me.columnprice = New DataColumn("price", GetType(System.Decimal), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnprice)
            Me.columnstand = New DataColumn("stand", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnstand)
            Me.columnanount = New DataColumn("anount", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnanount)
        End Sub
        
        Public Function NewstoreRow() As storeRow
            Return CType(Me.NewRow,storeRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New storeRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(storeRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.storeRowChangedEvent) Is Nothing) Then
                RaiseEvent storeRowChanged(Me, New storeRowChangeEvent(CType(e.Row,storeRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.storeRowChangingEvent) Is Nothing) Then
                RaiseEvent storeRowChanging(Me, New storeRowChangeEvent(CType(e.Row,storeRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.storeRowDeletedEvent) Is Nothing) Then
                RaiseEvent storeRowDeleted(Me, New storeRowChangeEvent(CType(e.Row,storeRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.storeRowDeletingEvent) Is Nothing) Then
                RaiseEvent storeRowDeleting(Me, New storeRowChangeEvent(CType(e.Row,storeRow), e.Action))
            End If
        End Sub
        
        Public Sub RemovestoreRow(ByVal row As storeRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class storeRow
        Inherits DataRow
        
        Private tablestore As storeDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tablestore = CType(Me.Table,storeDataTable)
        End Sub
        
        Public Property aname As String
            Get
                Try 
                    Return CType(Me(Me.tablestore.anameColumn),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.tablestore.anameColumn) = value
            End Set
        End Property
        
        Public Property ano As String
            Get
                Try 
                    Return CType(Me(Me.tablestore.anoColumn),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.tablestore.anoColumn) = value
            End Set
        End Property
        
        Public Property descript As String
            Get
                Try 
                    Return CType(Me(Me.tablestore.descriptColumn),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.tablestore.descriptColumn) = value
            End Set
        End Property
        
        Public Property price As Decimal
            Get
                Try 
                    Return CType(Me(Me.tablestore.priceColumn),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.tablestore.priceColumn) = value
            End Set
        End Property
        
        Public Property stand As String
            Get
                Try 
                    Return CType(Me(Me.tablestore.standColumn),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.tablestore.standColumn) = value
            End Set
        End Property
        
        Public Property anount As Integer
            Get
                Try 
                    Return CType(Me(Me.tablestore.anountColumn),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.tablestore.anountColumn) = value
            End Set
        End Property
        
        Public Function IsanameNull() As Boolean
            Return Me.IsNull(Me.tablestore.anameColumn)
        End Function
        
        Public Sub SetanameNull()
            Me(Me.tablestore.anameColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsanoNull() As Boolean
            Return Me.IsNull(Me.tablestore.anoColumn)
        End Function
        
        Public Sub SetanoNull()
            Me(Me.tablestore.anoColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsdescriptNull() As Boolean
            Return Me.IsNull(Me.tablestore.descriptColumn)
        End Function
        
        Public Sub SetdescriptNull()
            Me(Me.tablestore.descriptColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IspriceNull() As Boolean
            Return Me.IsNull(Me.tablestore.priceColumn)
        End Function
        
        Public Sub SetpriceNull()
            Me(Me.tablestore.priceColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsstandNull() As Boolean
            Return Me.IsNull(Me.tablestore.standColumn)
        End Function
        
        Public Sub SetstandNull()
            Me(Me.tablestore.standColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsanountNull() As Boolean
            Return Me.IsNull(Me.tablestore.anountColumn)
        End Function
        
        Public Sub SetanountNull()
            Me(Me.tablestore.anountColumn) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class storeRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As storeRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As storeRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As storeRow
            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