IEditableObject Interface
.NET Framework 3.0
Provides functionality to commit or rollback changes to an object that is used as a data source.
Namespace: System.ComponentModel
Assembly: System (in system.dll)
Assembly: System (in system.dll)
This interface is typically used to capture the BeginEdit, EndEdit, and CancelEdit semantics of a DataRowView.
The following sample provides a simple implementation of the IEditableObject interface. The Customer class stores customer information and can be used as a collection for a customer database. This sample assumes that you have used the CustomerList class that can be found in sample in the IBindingList class.
Public Class Customer Implements IEditableObject Structure CustomerData Friend id As String Friend firstName As String Friend lastName As String End Structure Public parent As CustomersList Private custData As CustomerData Private backupData As CustomerData Private inTxn As Boolean = False ' Implements IEditableObject Sub BeginEdit() Implements IEditableObject.BeginEdit Console.WriteLine("Start BeginEdit") If Not inTxn Then Me.backupData = custData inTxn = True Console.WriteLine(("BeginEdit - " + Me.backupData.lastName)) End If Console.WriteLine("End BeginEdit") End Sub Sub CancelEdit() Implements IEditableObject.CancelEdit Console.WriteLine("Start CancelEdit") If inTxn Then Me.custData = backupData inTxn = False Console.WriteLine(("CancelEdit - " + Me.custData.lastName)) End If Console.WriteLine("End CancelEdit") End Sub Sub EndEdit() Implements IEditableObject.EndEdit Console.WriteLine(("Start EndEdit" + Me.custData.id + Me.custData.lastName)) If inTxn Then backupData = New CustomerData() inTxn = False Console.WriteLine(("Done EndEdit - " + Me.custData.id + Me.custData.lastName)) End If Console.WriteLine("End EndEdit") End Sub Public Sub New(ByVal ID As String) Me.custData = New CustomerData() Me.custData.id = ID Me.custData.firstName = "" Me.custData.lastName = "" End Sub Public ReadOnly Property ID() As String Get Return Me.custData.id End Get End Property Public Property FirstName() As String Get Return Me.custData.firstName End Get Set(ByVal Value As String) Me.custData.firstName = Value Me.OnCustomerChanged() End Set End Property Public Property LastName() As String Get Return Me.custData.lastName End Get Set(ByVal Value As String) Me.custData.lastName = Value Me.OnCustomerChanged() End Set End Property Friend Property Parents() As CustomersList Get Return Parent End Get Set(ByVal Value As CustomersList) parent = Value End Set End Property Private Sub OnCustomerChanged() If Not inTxn And (Parent IsNot Nothing) Then Parent.CustomerChanged(Me) End If End Sub Public Overrides Function ToString() As String Dim sb As New StringWriter() sb.Write(Me.FirstName) sb.Write(" ") sb.Write(Me.LastName) Return sb.ToString() End Function End Class
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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