Form.Load-Ereignis
Tritt ein, bevor ein Formular erstmals angezeigt wird.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)
Syntax
'Declaration
Public Event Load As EventHandler
'Usage
Dim instance As Form
Dim handler As EventHandler
AddHandler instance.Load, handler
public event EventHandler Load
public:
event EventHandler^ Load {
void add (EventHandler^ value);
void remove (EventHandler^ value);
}
/** @event */
public void add_Load (EventHandler value)
/** @event */
public void remove_Load (EventHandler value)
JScript unterstützt die Verwendung von Ereignissen, aber nicht die Deklaration von neuen Ereignissen.
Hinweise
Mit diesem Ereignis können Sie Aufgaben wie das Reservieren der vom Formular verwendeten Ressourcen ausführen.
Weitere Informationen zum Behandeln von Ereignissen finden Sie unter Behandeln von Ereignissen.
Beispiel
Im folgenden Codebeispiel wird die Verwendung der Member SetDesktopLocation, Load, Activated und Activate veranschaulicht. Zum Ausführen des Beispiels fügen Sie den folgenden Code in ein Formular mit dem Namen Form1 ein, das einen Button mit der Bezeichnung Button1 und zwei Label-Steuerelemente mit der Bezeichnung Label1 und Label2 enthält.
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
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;
}
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;
}
private static int x = 200;
private static int y = 200;
private void button1_Click(Object sender, System.EventArgs e)
{
// Create a new Form1 and set its Visible property to true.
Form1 form2 = new Form1();
form2.set_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.set_Enabled(false);
} //button1_Click
// 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.set_Text("x: " + x + " y: " + y);
label2.set_Text("Number of forms currently open: " + count);
} //Form1_Activated
private static int count = 0;
private void Form1_Closed(Object sender, System.EventArgs e)
{
count -= 1;
} //Form1_Closed
private void Form1_Load(Object sender, System.EventArgs e)
{
count += 1;
} //Form1_Load
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0
Siehe auch
Referenz
Form-Klasse
Form-Member
System.Windows.Forms-Namespace
OnLoad
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