Время создания: 24.03.2018 23:13
Occurs before a form is displayed for the first time.
Public Event Load As EventHandler
public event EventHandler Load;
public: __event EventHandler* Load;
[JScript] In JScript, you can handle the events defined by a class, but you cannot define your own.
The event handler receives an argument of type EventArgs.
You can use this event to perform tasks such as allocating resources used by the form.
For more information about handling events, see Consuming Events.
[Visual Basic, C#] The following code example demonstrates how to use the SetDesktopLocation, Load and Activate members. 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. Ensure all events are connected to their event-handling methods.
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.
x += 30
y += 30
' Keep the current form active by calling the Activate method.
Me.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 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
Shared count As Integer = 0
Private Sub Form1_Closed(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles MyBase.Closed
count -= 1
Private Sub Form1_Load(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
count += 1
static int x = 200;
static int y = 200;
private void Button1_Click(System.Object sender,
// 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.
x += 30;
y += 30;
// Keep the current form active by calling the 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;
[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button in the upper-left corner of the page.
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Syntax based on .NET Framework version 1.1.
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