Form.Closed Kejadian

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Terjadi ketika formulir ditutup.

public:
 event EventHandler ^ Closed;

[System.ComponentModel.Browsable(false)]
public event EventHandler? Closed;

[<System.ComponentModel.Browsable(false)>]
member this.Closed : EventHandler 

Public Custom Event Closed As EventHandler 

Jenis Acara

EventHandler

Atribut

BrowsableAttribute

Contoh

Contoh berikut menunjukkan cara menggunakan SetDesktopLocationanggota , , ClosedLoad, Activated, dan Activate . Untuk menjalankan contoh, tempelkan kode berikut dalam formulir yang disebut Form1 berisi Button yang disebut Button1 dan dua Label kontrol yang disebut Label1 dan 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

Keterangan

Perhatian

Peristiwa Closed kedaluarsa dalam .NET Framework versi 2.0; gunakan peristiwa sebagai gantinyaFormClosed.

Peristiwa ini terjadi setelah formulir ditutup oleh pengguna atau dengan Close metode formulir. Untuk mencegah formulir ditutup, tangani Closing peristiwa dan atur Cancel properti yang CancelEventArgs diteruskan ke penanganan aktivitas Anda ke true.

Anda dapat menggunakan kejadian ini untuk melakukan tugas seperti membebaskan sumber daya yang digunakan oleh formulir dan untuk menyimpan informasi yang dimasukkan dalam formulir atau untuk memperbarui formulir induknya.

Perhatian

Peristiwa Form.Closed dan Form.Closing tidak dinaikkan ketika Application.Exit metode dipanggil untuk keluar dari aplikasi Anda. Jika Anda memiliki kode validasi di salah satu peristiwa ini yang harus dijalankan, Anda harus memanggil Form.Close metode untuk setiap formulir terbuka satu per satu sebelum memanggil Exit metode .

Jika formulir adalah formulir induk MDI, Closing peristiwa semua bentuk anak MDI dimunculkan sebelum acara formulir Closing induk MDI dinaikkan. Selain itu, Closed kejadian semua bentuk anak MDI dimunculkan sebelum Closed acara formulir induk MDI dinaikkan.

Untuk informasi selengkapnya tentang menangani peristiwa, lihat Menangani dan Menaikkan Peristiwa.

Lihat juga

• IsMdiContainer
• OnClosed(EventArgs)
• Load