Form.Deactivate Event
Definition
Important
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Occurs when an active form becomes inactive. This API is obsolete. For information about how to develop ASP.NET mobile applications, see Mobile Apps & Sites with ASP.NET.
public:
event EventHandler ^ Deactivate;public event EventHandler Deactivate;member this.Deactivate : EventHandler Public Custom Event Deactivate As EventHandler Event Type
Examples
The following code example demonstrates how to trap the Deactivate event to clear the SelectionList. This example is part of a larger example for the Form overview.
// When Form1 is deactivated
private void Form1_Deactivate(object sender, EventArgs e)
{
count++;
}
' When Form1 is deactivated
Private Sub Form1_Deactivate(ByVal sender As Object, _
ByVal e As EventArgs)
count += 1
End Sub
Remarks
A form becomes inactive under the following circumstances:
When the ActiveForm property of the page is programmatically set to another form.
When the user navigates to a form through a Link control whose target is a form.
If neither of these actions occurs, the active form will never receive a Deactivate event. This event's position in the event chain makes it very important in resetting the child controls, data set, or global variables.
