Form.OnClosed Method
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Caution: |
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| The OnClosed method is obsolete in the .NET Framework version 2.0; use the OnFormClosed method instead. |
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnFormClosed method also allows derived classes to handle the event without attaching a delegate. Overriding this method is the preferred technique for handling the event in a derived class.
Caution: |
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| The OnClosed and OnClosing methods are not called when the Application.Exit method is called to exit your application. If you have validation code in either of these methods that must be executed, you should call the Form.Close method for each open form individually before calling the Exit method. |
The following code example demonstrates how to override the OnClosed method in a class derived from Form .
public ref class myForm: public Form { protected: virtual void OnClosed( EventArgs^ e ) override { MessageBox::Show( "The form is now closing.", "Close Warning", MessageBoxButtons::OK, MessageBoxIcon::Warning ); Form::OnClosed( e ); } public: myForm() : Form() {} };
public class myForm extends Form
{
protected void OnClosed(EventArgs e)
{
MessageBox.Show("The form is now closing.", "Close Warning",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
super.OnClosed(e);
} //OnClosed
public myForm()
{
super();
} //myForm
} //myForm
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.
Caution: