ds.vb

一个功能强大的学生公寓管理系统 界面非常友好 十分强大

            Dim row房源库Row As 房源库Row = CType(Me.NewRow,房源库Row)
            row房源库Row.ItemArray = New Object() {栋号, 房号, 类别, 级别, 总床位, 宿舍电话}
            Me.Rows.Add(row房源库Row)
            Return row房源库Row
        End Function
        
        Public Function FindBy栋号房号(ByVal 栋号 As String, ByVal 房号 As String) As 房源库Row
            Return CType(Me.Rows.Find(New Object() {栋号, 房号}),房源库Row)
        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 房源库DataTable = CType(MyBase.Clone,房源库DataTable)
            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New 房源库DataTable
        End Function
        
        Friend Sub InitVars()
            Me.column栋号 = Me.Columns("栋号")
            Me.column房号 = Me.Columns("房号")
            Me.column类别 = Me.Columns("类别")
            Me.column级别 = Me.Columns("级别")
            Me.column总床位 = Me.Columns("总床位")
            Me.column宿舍电话 = Me.Columns("宿舍电话")
        End Sub
        
        Private Sub InitClass()
            Me.column栋号 = New DataColumn("栋号", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column栋号)
            Me.column房号 = New DataColumn("房号", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column房号)
            Me.column类别 = New DataColumn("类别", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column类别)
            Me.column级别 = New DataColumn("级别", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column级别)
            Me.column总床位 = New DataColumn("总床位", GetType(System.Int32), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column总床位)
            Me.column宿舍电话 = New DataColumn("宿舍电话", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.column宿舍电话)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.column栋号, Me.column房号}, true))
            Me.column栋号.AllowDBNull = false
            Me.column房号.AllowDBNull = false
        End Sub
        
        Public Function New房源库Row() As 房源库Row
            Return CType(Me.NewRow,房源库Row)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New 房源库Row(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(房源库Row)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.房源库RowChangedEvent) Is Nothing) Then
                RaiseEvent 房源库RowChanged(Me, New 房源库RowChangeEvent(CType(e.Row,房源库Row), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.房源库RowChangingEvent) Is Nothing) Then
                RaiseEvent 房源库RowChanging(Me, New 房源库RowChangeEvent(CType(e.Row,房源库Row), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.房源库RowDeletedEvent) Is Nothing) Then
                RaiseEvent 房源库RowDeleted(Me, New 房源库RowChangeEvent(CType(e.Row,房源库Row), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.房源库RowDeletingEvent) Is Nothing) Then
                RaiseEvent 房源库RowDeleting(Me, New 房源库RowChangeEvent(CType(e.Row,房源库Row), e.Action))
            End If
        End Sub
        
        Public Sub Remove房源库Row(ByVal row As 房源库Row)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class 房源库Row
        Inherits DataRow
        
        Private table房源库 As 房源库DataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.table房源库 = CType(Me.Table,房源库DataTable)
        End Sub
        
        Public Property 栋号 As String
            Get
                Return CType(Me(Me.table房源库.栋号Column),String)
            End Get
            Set
                Me(Me.table房源库.栋号Column) = value
            End Set
        End Property
        
        Public Property 房号 As String
            Get
                Return CType(Me(Me.table房源库.房号Column),String)
            End Get
            Set
                Me(Me.table房源库.房号Column) = value
            End Set
        End Property
        
        Public Property 类别 As String
            Get
                Try 
                    Return CType(Me(Me.table房源库.类别Column),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.table房源库.类别Column) = value
            End Set
        End Property
        
        Public Property 级别 As String
            Get
                Try 
                    Return CType(Me(Me.table房源库.级别Column),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.table房源库.级别Column) = value
            End Set
        End Property
        
        Public Property 总床位 As Integer
            Get
                Try 
                    Return CType(Me(Me.table房源库.总床位Column),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.table房源库.总床位Column) = value
            End Set
        End Property
        
        Public Property 宿舍电话 As String
            Get
                Try 
                    Return CType(Me(Me.table房源库.宿舍电话Column),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.table房源库.宿舍电话Column) = value
            End Set
        End Property
        
        Public Function Is类别Null() As Boolean
            Return Me.IsNull(Me.table房源库.类别Column)
        End Function
        
        Public Sub Set类别Null()
            Me(Me.table房源库.类别Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is级别Null() As Boolean
            Return Me.IsNull(Me.table房源库.级别Column)
        End Function
        
        Public Sub Set级别Null()
            Me(Me.table房源库.级别Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is总床位Null() As Boolean
            Return Me.IsNull(Me.table房源库.总床位Column)
        End Function
        
        Public Sub Set总床位Null()
            Me(Me.table房源库.总床位Column) = System.Convert.DBNull
        End Sub
        
        Public Function Is宿舍电话Null() As Boolean
            Return Me.IsNull(Me.table房源库.宿舍电话Column)
        End Function
        
        Public Sub Set宿舍电话Null()
            Me(Me.table房源库.宿舍电话Column) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class 房源库RowChangeEvent
        Inherits EventArgs
        
        Private eventRow As 房源库Row
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As 房源库Row, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As 房源库Row
            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