dsjswgxg.vb

一个实际的商业项目

        Public Event JsWgRowChanging As JsWgRowChangeEventHandler
        
        Public Event JsWgRowDeleted As JsWgRowChangeEventHandler
        
        Public Event JsWgRowDeleting As JsWgRowChangeEventHandler
        
        Public Overloads Sub AddJsWgRow(ByVal row As JsWgRow)
            Me.Rows.Add(row)
        End Sub
        
        Public Overloads Function AddJsWgRow(ByVal Rq As String, ByVal Gh As String, ByVal Xm As String, ByVal Gx As String, ByVal Sl As Double, ByVal Bz As String) As JsWgRow
            Dim rowJsWgRow As JsWgRow = CType(Me.NewRow,JsWgRow)
            rowJsWgRow.ItemArray = New Object() {Rq, Gh, Xm, Gx, Sl, Bz}
            Me.Rows.Add(rowJsWgRow)
            Return rowJsWgRow
        End Function
        
        Public Function FindByRqGhXmGx(ByVal Rq As String, ByVal Gh As String, ByVal Xm As String, ByVal Gx As String) As JsWgRow
            Return CType(Me.Rows.Find(New Object() {Rq, Gh, Xm, Gx}),JsWgRow)
        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 JsWgDataTable = CType(MyBase.Clone,JsWgDataTable)
            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New JsWgDataTable
        End Function
        
        Friend Sub InitVars()
            Me.columnRq = Me.Columns("Rq")
            Me.columnGh = Me.Columns("Gh")
            Me.columnXm = Me.Columns("Xm")
            Me.columnGx = Me.Columns("Gx")
            Me.columnSl = Me.Columns("Sl")
            Me.columnBz = Me.Columns("Bz")
        End Sub
        
        Private Sub InitClass()
            Me.columnRq = New DataColumn("Rq", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnRq)
            Me.columnGh = New DataColumn("Gh", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnGh)
            Me.columnXm = New DataColumn("Xm", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnXm)
            Me.columnGx = New DataColumn("Gx", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnGx)
            Me.columnSl = New DataColumn("Sl", GetType(System.Double), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnSl)
            Me.columnBz = New DataColumn("Bz", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnBz)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.columnRq, Me.columnGh, Me.columnXm, Me.columnGx}, true))
            Me.columnRq.AllowDBNull = false
            Me.columnGh.AllowDBNull = false
            Me.columnXm.AllowDBNull = false
            Me.columnGx.AllowDBNull = false
        End Sub
        
        Public Function NewJsWgRow() As JsWgRow
            Return CType(Me.NewRow,JsWgRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New JsWgRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(JsWgRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.JsWgRowChangedEvent) Is Nothing) Then
                RaiseEvent JsWgRowChanged(Me, New JsWgRowChangeEvent(CType(e.Row,JsWgRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.JsWgRowChangingEvent) Is Nothing) Then
                RaiseEvent JsWgRowChanging(Me, New JsWgRowChangeEvent(CType(e.Row,JsWgRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.JsWgRowDeletedEvent) Is Nothing) Then
                RaiseEvent JsWgRowDeleted(Me, New JsWgRowChangeEvent(CType(e.Row,JsWgRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.JsWgRowDeletingEvent) Is Nothing) Then
                RaiseEvent JsWgRowDeleting(Me, New JsWgRowChangeEvent(CType(e.Row,JsWgRow), e.Action))
            End If
        End Sub
        
        Public Sub RemoveJsWgRow(ByVal row As JsWgRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class JsWgRow
        Inherits DataRow
        
        Private tableJsWg As JsWgDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tableJsWg = CType(Me.Table,JsWgDataTable)
        End Sub
        
        Public Property Rq As String
            Get
                Return CType(Me(Me.tableJsWg.RqColumn),String)
            End Get
            Set
                Me(Me.tableJsWg.RqColumn) = value
            End Set
        End Property
        
        Public Property Gh As String
            Get
                Return CType(Me(Me.tableJsWg.GhColumn),String)
            End Get
            Set
                Me(Me.tableJsWg.GhColumn) = value
            End Set
        End Property
        
        Public Property Xm As String
            Get
                Return CType(Me(Me.tableJsWg.XmColumn),String)
            End Get
            Set
                Me(Me.tableJsWg.XmColumn) = value
            End Set
        End Property
        
        Public Property Gx As String
            Get
                Return CType(Me(Me.tableJsWg.GxColumn),String)
            End Get
            Set
                Me(Me.tableJsWg.GxColumn) = value
            End Set
        End Property
        
        Public Property Sl As Double
            Get
                Try 
                    Return CType(Me(Me.tableJsWg.SlColumn),Double)
                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.tableJsWg.SlColumn) = value
            End Set
        End Property
        
        Public Property Bz As String
            Get
                Try 
                    Return CType(Me(Me.tableJsWg.BzColumn),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.tableJsWg.BzColumn) = value
            End Set
        End Property
        
        Public Function IsSlNull() As Boolean
            Return Me.IsNull(Me.tableJsWg.SlColumn)
        End Function
        
        Public Sub SetSlNull()
            Me(Me.tableJsWg.SlColumn) = System.Convert.DBNull
        End Sub
        
        Public Function IsBzNull() As Boolean
            Return Me.IsNull(Me.tableJsWg.BzColumn)
        End Function
        
        Public Sub SetBzNull()
            Me(Me.tableJsWg.BzColumn) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class JsWgRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As JsWgRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As JsWgRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As JsWgRow
            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