test.vb

connect db by vb.net

            Me.Columns.Add(Me.columnType)
            Me.columnQty = New DataColumn("Qty", GetType(System.Decimal), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnQty)
            Me.column_Date = New DataColumn("Date", GetType(System.DateTime), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column_Date)
        End Sub
        
        Public Function NewtestRow() As testRow
            Return CType(Me.NewRow,testRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New testRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(testRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.testRowChangedEvent) Is Nothing) Then
                RaiseEvent testRowChanged(Me, New testRowChangeEvent(CType(e.Row,testRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.testRowChangingEvent) Is Nothing) Then
                RaiseEvent testRowChanging(Me, New testRowChangeEvent(CType(e.Row,testRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.testRowDeletedEvent) Is Nothing) Then
                RaiseEvent testRowDeleted(Me, New testRowChangeEvent(CType(e.Row,testRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.testRowDeletingEvent) Is Nothing) Then
                RaiseEvent testRowDeleting(Me, New testRowChangeEvent(CType(e.Row,testRow), e.Action))
            End If
        End Sub
        
        Public Sub RemovetestRow(ByVal row As testRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class testRow
        Inherits DataRow
        
        Private tabletest As testDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tabletest = CType(Me.Table,testDataTable)
        End Sub
        
        Public Property PartCode As String
            Get
                Try 
                    Return CType(Me(Me.tabletest.PartCodeColumn),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("Cannot get value because it is DBNull.", e)
                End Try
            End Get
            Set
                Me(Me.tabletest.PartCodeColumn) = value
            End Set
        End Property
        
        Public Property Type As String
            Get
                Try 
                    Return CType(Me(Me.tabletest.TypeColumn),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("Cannot get value because it is DBNull.", e)
                End Try
            End Get
            Set
                Me(Me.tabletest.TypeColumn) = value
            End Set
        End Property
        
        Public Property Qty As Decimal
            Get
                Try 
                    Return CType(Me(Me.tabletest.QtyColumn),Decimal)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("Cannot get value because it is DBNull.", e)
                End Try
            End Get
            Set
                Me(Me.tabletest.QtyColumn) = value
            End Set
        End Property
        
        Public Property _Date As Date
            Get
                Try 
                    Return CType(Me(Me.tabletest._DateColumn),Date)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("Cannot get value because it is DBNull.", e)
                End Try
            End Get
            Set
                Me(Me.tabletest._DateColumn) = value
            End Set
        End Property
        
        Public Function IsPartCodeNull() As Boolean
            Return Me.IsNull(Me.tabletest.PartCodeColumn)
        End Function
        
        Public Sub SetPartCodeNull()
            Me(Me.tabletest.PartCodeColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsTypeNull() As Boolean
            Return Me.IsNull(Me.tabletest.TypeColumn)
        End Function
        
        Public Sub SetTypeNull()
            Me(Me.tabletest.TypeColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsQtyNull() As Boolean
            Return Me.IsNull(Me.tabletest.QtyColumn)
        End Function
        
        Public Sub SetQtyNull()
            Me(Me.tabletest.QtyColumn) = System.Convert.DBNull
        End Sub
        
        Public Function Is_DateNull() As Boolean
            Return Me.IsNull(Me.tabletest._DateColumn)
        End Function
        
        Public Sub Set_DateNull()
            Me(Me.tabletest._DateColumn) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class testRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As testRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As testRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As testRow
            Get
                Return Me.eventRow
            End Get
        End Property
        
        Public ReadOnly Property Action As DataRowAction
            Get
                Return Me.eventAction
            End Get
        End Property
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class test2DataTable
        Inherits DataTable
        Implements System.Collections.IEnumerable
        
        Private columnDesc As DataColumn
        
        Private columnMonth As DataColumn
        
        Private columnSignal As DataColumn
        
        Private columnWeekNo As DataColumn
        
        Private columnMCNo As DataColumn
        
        Private columnModel As DataColumn
        
        Private columnSN As DataColumn
        
        Friend Sub New()
            MyBase.New("test2")
            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 DescColumn As DataColumn
            Get
                Return Me.columnDesc
            End Get
        End Property
        
        Friend ReadOnly Property MonthColumn As DataColumn
            Get
                Return Me.columnMonth
            End Get
        End Property
        
        Friend ReadOnly Property SignalColumn As DataColumn
            Get
                Return Me.columnSignal
            End Get
        End Property
        
        Friend ReadOnly Property WeekNoColumn As DataColumn
            Get
                Return Me.columnWeekNo
            End Get
        End Property
        
        Friend ReadOnly Property MCNoColumn As DataColumn
            Get
                Return Me.columnMCNo
            End Get
        End Property
        
        Friend ReadOnly Property ModelColumn As DataColumn
            Get
                Return Me.columnModel
            End Get
        End Property
        
        Friend ReadOnly Property SNColumn As DataColumn
            Get
                Return Me.columnSN
            End Get
        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As test2Row
            Get
                Return CType(Me.Rows(index),test2Row)
            End Get
        End Property
        
        Public Event test2RowChanged As test2RowChangeEventHandler
        
        Public Event test2RowChanging As test2RowChangeEventHandler
        
        Public Event test2RowDeleted As test2RowChangeEventHandler
        
        Public Event test2RowDeleting As test2RowChangeEventHandler
        
        Public Overloads Sub Addtest2Row(ByVal row As test2Row)
            Me.Rows.Add(row)
        End Sub