project.vb

Beginning VB.NET DatabasesAll_Code.rar

        End Property
        
        Public Default ReadOnly Property Item(ByVal index As Integer) As ProjectRow
            Get
                Return CType(Me.Rows(index),ProjectRow)
            End Get
        End Property
        
        Public Event ProjectRowChanged As ProjectRowChangeEventHandler
        
        Public Event ProjectRowChanging As ProjectRowChangeEventHandler
        
        Public Event ProjectRowDeleted As ProjectRowChangeEventHandler
        
        Public Event ProjectRowDeleting As ProjectRowChangeEventHandler
        
        Public Overloads Sub AddProjectRow(ByVal row As ProjectRow)
            Me.Rows.Add(row)
        End Sub
        
        Public Overloads Function AddProjectRow(ByVal ProjectID As System.Guid, ByVal ProjectName As String, ByVal ProjectDescription As String, ByVal SequenceNumber As Byte) As ProjectRow
            Dim rowProjectRow As ProjectRow = CType(Me.NewRow,ProjectRow)
            rowProjectRow.ItemArray = New Object() {ProjectID, ProjectName, ProjectDescription, SequenceNumber}
            Me.Rows.Add(rowProjectRow)
            Return rowProjectRow
        End Function
        
        Public Function FindByProjectID(ByVal ProjectID As System.Guid) As ProjectRow
            Return CType(Me.Rows.Find(New Object() {ProjectID}),ProjectRow)
        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 ProjectDataTable = CType(MyBase.Clone,ProjectDataTable)
            cln.InitVars
            Return cln
        End Function
        
        Protected Overrides Function CreateInstance() As DataTable
            Return New ProjectDataTable
        End Function
        
        Friend Sub InitVars()
            Me.columnProjectID = Me.Columns("ProjectID")
            Me.columnProjectName = Me.Columns("ProjectName")
            Me.columnProjectDescription = Me.Columns("ProjectDescription")
            Me.columnSequenceNumber = Me.Columns("SequenceNumber")
        End Sub
        
        Private Sub InitClass()
            Me.columnProjectID = New DataColumn("ProjectID", GetType(System.Guid), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProjectID)
            Me.columnProjectName = New DataColumn("ProjectName", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProjectName)
            Me.columnProjectDescription = New DataColumn("ProjectDescription", GetType(System.String), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnProjectDescription)
            Me.columnSequenceNumber = New DataColumn("SequenceNumber", GetType(System.Byte), Nothing, System.Data.MappingType.Element)
            Me.Columns.Add(Me.columnSequenceNumber)
            Me.Constraints.Add(New UniqueConstraint("Constraint1", New DataColumn() {Me.columnProjectID}, true))
            Me.columnProjectID.AllowDBNull = false
            Me.columnProjectID.Unique = true
            Me.columnProjectName.AllowDBNull = false
            Me.columnSequenceNumber.AllowDBNull = false
        End Sub
        
        Public Function NewProjectRow() As ProjectRow
            Return CType(Me.NewRow,ProjectRow)
        End Function
        
        Protected Overrides Function NewRowFromBuilder(ByVal builder As DataRowBuilder) As DataRow
            Return New ProjectRow(builder)
        End Function
        
        Protected Overrides Function GetRowType() As System.Type
            Return GetType(ProjectRow)
        End Function
        
        Protected Overrides Sub OnRowChanged(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanged(e)
            If (Not (Me.ProjectRowChangedEvent) Is Nothing) Then
                RaiseEvent ProjectRowChanged(Me, New ProjectRowChangeEvent(CType(e.Row,ProjectRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowChanging(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowChanging(e)
            If (Not (Me.ProjectRowChangingEvent) Is Nothing) Then
                RaiseEvent ProjectRowChanging(Me, New ProjectRowChangeEvent(CType(e.Row,ProjectRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleted(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleted(e)
            If (Not (Me.ProjectRowDeletedEvent) Is Nothing) Then
                RaiseEvent ProjectRowDeleted(Me, New ProjectRowChangeEvent(CType(e.Row,ProjectRow), e.Action))
            End If
        End Sub
        
        Protected Overrides Sub OnRowDeleting(ByVal e As DataRowChangeEventArgs)
            MyBase.OnRowDeleting(e)
            If (Not (Me.ProjectRowDeletingEvent) Is Nothing) Then
                RaiseEvent ProjectRowDeleting(Me, New ProjectRowChangeEvent(CType(e.Row,ProjectRow), e.Action))
            End If
        End Sub
        
        Public Sub RemoveProjectRow(ByVal row As ProjectRow)
            Me.Rows.Remove(row)
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class ProjectRow
        Inherits DataRow
        
        Private tableProject As ProjectDataTable
        
        Friend Sub New(ByVal rb As DataRowBuilder)
            MyBase.New(rb)
            Me.tableProject = CType(Me.Table,ProjectDataTable)
        End Sub
        
        Public Property ProjectID As System.Guid
            Get
                Return CType(Me(Me.tableProject.ProjectIDColumn),System.Guid)
            End Get
            Set
                Me(Me.tableProject.ProjectIDColumn) = value
            End Set
        End Property
        
        Public Property ProjectName As String
            Get
                Return CType(Me(Me.tableProject.ProjectNameColumn),String)
            End Get
            Set
                Me(Me.tableProject.ProjectNameColumn) = value
            End Set
        End Property
        
        Public Property ProjectDescription As String
            Get
                Try 
                    Return CType(Me(Me.tableProject.ProjectDescriptionColumn),String)
                Catch e As InvalidCastException
                    Throw New StrongTypingException("Cannot get value because it is DBNull.", e)
                End Try
            End Get
            Set
                Me(Me.tableProject.ProjectDescriptionColumn) = value
            End Set
        End Property
        
        Public Property SequenceNumber As Byte
            Get
                Return CType(Me(Me.tableProject.SequenceNumberColumn),Byte)
            End Get
            Set
                Me(Me.tableProject.SequenceNumberColumn) = value
            End Set
        End Property
        
        Public Function IsProjectDescriptionNull() As Boolean
            Return Me.IsNull(Me.tableProject.ProjectDescriptionColumn)
        End Function
        
        Public Sub SetProjectDescriptionNull()
            Me(Me.tableProject.ProjectDescriptionColumn) = System.Convert.DBNull
        End Sub
    End Class
    
    <System.Diagnostics.DebuggerStepThrough()>  _
    Public Class ProjectRowChangeEvent
        Inherits EventArgs
        
        Private eventRow As ProjectRow
        
        Private eventAction As DataRowAction
        
        Public Sub New(ByVal row As ProjectRow, ByVal action As DataRowAction)
            MyBase.New
            Me.eventRow = row
            Me.eventAction = action
        End Sub
        
        Public ReadOnly Property Row As ProjectRow
            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