Raises the ControlAdded event.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Called when a child control is added to the control.
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.Notes to Inheritors:
When overriding in a derived class, be sure to call the base class's method so that registered delegates receive the event.
' This example demonstrates the use of the ControlAdded and ' ControlRemoved events. This example assumes that two Button controls ' are added to the form and connected to the addControl_Click and ' removeControl_Click event-handler methods. Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load ' Connect the ControlRemoved and ControlAdded event handlers to the event-handler methods. ' ControlRemoved and ControlAdded are not available at design time. AddHandler Me.ControlRemoved, AddressOf Me.Control_Removed AddHandler Me.ControlAdded, AddressOf Me.Control_Added End Sub 'Form1_Load Private Sub Control_Added(ByVal sender As Object, ByVal e As System.Windows.Forms.ControlEventArgs) MessageBox.Show(("The control named " + e.Control.Name + " has been added to the form.")) End Sub Private Sub Control_Removed(ByVal sender As Object, ByVal e As System.Windows.Forms.ControlEventArgs) MessageBox.Show(("The control named " + e.Control.Name + " has been removed from the form.")) End Sub ' Click event handler for a Button control. Adds a TextBox to the form. Private Sub addControl_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button1.Click ' Create a new TextBox control and add it to the form. Dim textBox1 As New TextBox() textBox1.Size = New Size(100, 10) textBox1.Location = New Point(10, 10) ' Name the control in order to remove it later. ' The name must be specified if a control is added at run time. textBox1.Name = "textBox1" ' Add the control to the form's control collection. Me.Controls.Add(textBox1) End Sub ' Click event handler for a Button control. ' Removes the previously added TextBox from the form. Private Sub removeControl_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button2.Click ' Loop through all controls in the form's control collection. Dim tempCtrl As Control For Each tempCtrl In Me.Controls ' Determine whether the control is textBox1, ' and if it is, remove it. If tempCtrl.Name = "textBox1" Then Me.Controls.Remove(tempCtrl) End If Next tempCtrl End Sub
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.