Form.Closed Ereignis

Definition

Tritt auf, wenn das Formular geschlossen wird.Occurs when the form is closed.

public:
 event EventHandler ^ Closed;
[System.ComponentModel.Browsable(false)]
public event EventHandler Closed;
public event EventHandler Closed;
[<System.ComponentModel.Browsable(false)>]
member this.Closed : EventHandler 
member this.Closed : EventHandler 
Public Custom Event Closed As EventHandler 

Ereignistyp

EventHandler
Attribute

Beispiele

Im folgenden Beispiel wird veranschaulicht, wie die Member SetDesktopLocation , Closed , Load , Activated und Activate verwendet werden.The following example demonstrates how to use the SetDesktopLocation, Closed, Load, Activated, and Activate members. Um das Beispiel auszuführen, fügen Sie den folgenden Code in ein Formular namens ein, das Form1 einen Button aufgerufenen Button1 und zwei Steuerelemente mit dem Label Namen Label1 und enthält Label2 .To run the example, paste the following code in a form called Form1 containing a Button called Button1 and two Label controls called Label1 and Label2.

static int x = 200;
static int y = 200;
void Button1_Click( System::Object^ sender, System::EventArgs^ e )
{
   
   // Create a new Form1 and set its Visible property to true.
   Form1^ form2 = gcnew Form1;
   form2->Visible = true;
   
   // Set the new form's desktop location so it  
   // appears below and to the right of the current form.
   form2->SetDesktopLocation( x, y );
   x += 30;
   y += 30;
   
   // Keep the current form active by calling the Activate
   // method.
   this->Activate();
   this->Button1->Enabled = false;
}


// Updates the label text to reflect the current values of x 
// and y, which was were incremented in the Button1 control's 
// click event.
void Form1_Activated( Object^ sender, System::EventArgs^ e )
{
   Label1->Text = String::Format( "x: {0} y: {1}", x, y );
   Label2->Text = String::Format( "Number of forms currently open: {0}", count );
}

static int count = 0;
void Form1_Closed( Object^ sender, System::EventArgs^ e )
{
   count -= 1;
}

void Form1_Load( Object^ sender, System::EventArgs^ e )
{
   count += 1;
}
static int x = 200;
static int y = 200;

private void Button1_Click(System.Object sender, 
    System.EventArgs e)
{
    // Create a new Form1 and set its Visible property to true.
    Form1 form2 = new Form1();
    form2.Visible = true;

    // Set the new form's desktop location so it  
    // appears below and to the right of the current form.
    form2.SetDesktopLocation(x, y);
    x += 30;
    y += 30;

    // Keep the current form active by calling the Activate
    // method.
    this.Activate();
    this.Button1.Enabled = false;
}

// Updates the label text to reflect the current values of x 
// and y, which was were incremented in the Button1 control's 
// click event.
private void Form1_Activated(object sender, System.EventArgs e)
{
    Label1.Text = "x: "+x+" y: "+y;
    Label2.Text = "Number of forms currently open: "+count;
}

static int count = 0;

private void Form1_Closed(object sender, System.EventArgs e)
{
    count -= 1;
}

private void Form1_Load(object sender, System.EventArgs e)
{
    count += 1;
}
Shared x As Integer = 200
Shared y As Integer = 200

Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click

    ' Create a new Form1 and set its Visible property to true.
    Dim form2 As New Form1
    form2.Visible = True

    ' Set the new form's desktop location so it appears below and 
    ' to the right of the current form.
    form2.SetDesktopLocation(x, y)
    x += 30
    y += 30

    ' Keep the current form active by calling the Activate method.
    Me.Activate()
    Me.Button1.Enabled = False
End Sub



' Updates the label text to reflect the current values of x and y, 
' which was were incremented in the Button1 control's click event.
Private Sub Form1_Activated(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Activated
    Label1.Text = "x: " & x & " y: " & y
    Label2.Text = "Number of forms currently open: " & count
End Sub

Shared count As Integer = 0

Private Sub Form1_Closed(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Closed
    count -= 1
End Sub

Private Sub Form1_Load(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
    count += 1
End Sub

Hinweise

Achtung

Das Closed Ereignis ist in der .NET Framework Version 2,0 veraltet; verwenden Sie FormClosed stattdessen das Ereignis.The Closed event is obsolete in the .NET Framework version 2.0; use the FormClosed event instead.

Dieses Ereignis tritt auf, nachdem das Formular vom Benutzer oder von der- Close Methode des Formulars geschlossen wurde.This event occurs after the form has been closed by the user or by the Close method of the form. Um zu verhindern, dass ein Formular geschlossen wird, behandeln Sie das Closing -Ereignis, und legen Sie die-Eigenschaft des-Objekts, das an den- Cancel CancelEventArgs Ereignishandler trueTo prevent a form from closing, handle the Closing event and set the Cancel property of the CancelEventArgs passed to your event handler to true.

Sie können dieses Ereignis verwenden, um Aufgaben wie das Freigeben von Ressourcen, die vom Formular verwendet werden, und das Speichern von Informationen, die im Formular eingegeben wurden, oder das Aktualisieren des übergeordneten Formulars auszuführen.You can use this event to perform tasks such as freeing resources used by the form and to save information entered in the form or to update its parent form.

Achtung

Die Form.Closed -und- Form.Closing Ereignisse werden nicht ausgelöst, wenn die- Application.Exit Methode aufgerufen wird, um die Anwendung zu beenden.The Form.Closed and Form.Closing events are not raised when the Application.Exit method is called to exit your application. Wenn Sie in einem dieser Ereignisse Validierungscode ausführen müssen, sollten Sie die- Form.Close Methode für jedes geöffnete Formular einzeln aufrufen, bevor Sie die- Exit Methode aufrufen.If you have validation code in either of these events that must be executed, you should call the Form.Close method for each open form individually before calling the Exit method.

Wenn das Formular ein übergeordnetes MDI-Formular ist, Closing werden die Ereignisse aller untergeordneten MDI-Formulare ausgelöst, bevor das-Ereignis des übergeordneten MDI-Formulars Closing ausgelöst wird.If the form is an MDI parent form, the Closing events of all MDI child forms are raised before the MDI parent form's Closing event is raised. Außerdem Closed werden die Ereignisse aller untergeordneten MDI-Formulare ausgelöst, bevor das- Closed Ereignis des übergeordneten MDI-Formulars ausgelöst wird.In addition, the Closed events of all MDI child forms are raised before the Closed event of the MDI parent form is raised.

Weitere Informationen zur Behandlung von Ereignissen finden Sie unter behandeln und Auslösen von Ereignissen.For more information about handling events, see Handling and Raising Events.

Gilt für:

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