Occurs before the shortcut menu is displayed.
(in System.Windows.Forms.dll)
Visual Basic (Declaration)
Public Event Popup As EventHandler
Dim instance As ContextMenu
Dim handler As EventHandler
AddHandler instance.Popup, handler
public event EventHandler Popup
public:
event EventHandler^ Popup {
void add (EventHandler^ value);
void remove (EventHandler^ value);
}
JScript does not support events.
You can use this event to initialize the MenuItem objects before they are displayed. For example, if you use a ContextMenu for three TextBox controls and you want to disable certain menu items in the ContextMenu depending on which TextBox is displaying the shortcut menu, you can create an event handler for this event. You could use the SourceControl property to determine which TextBox is about to display the ContextMenu and disable the appropriate MenuItem objects.
For more information about handling events, see Consuming Events.
The following code example creates an event handler for the Popup event of the ContextMenu. The code in the event handler determines which of two controls a PictureBox named pictureBox1 and a TextBox named textBox1 is the control displaying the shortcut menu. Depending on which control caused the ContextMenu to display its shortcut menu, the control adds the appropriate MenuItem objects to the ContextMenu. This example requires that you have an instance of the ContextMenu class, named contextMenu1, defined within the form. This example also requires that you have a TextBox and PictureBox added to a form and that the ContextMenu property of these controls is set to contextMenu1.
Private Sub MyPopupEventHandler(sender As System.Object, e As System.EventArgs)
' Define the MenuItem objects to display for the TextBox.
Dim menuItem1 As New MenuItem("&Copy")
Dim menuItem2 As New MenuItem("&Find and Replace")
' Define the MenuItem object to display for the PictureBox.
Dim menuItem3 As New MenuItem("C&hange Picture")
' Clear all previously added MenuItems.
contextMenu1.MenuItems.Clear()
If contextMenu1.SourceControl Is textBox1 Then
' Add MenuItems to display for the TextBox.
contextMenu1.MenuItems.Add(menuItem1)
contextMenu1.MenuItems.Add(menuItem2)
ElseIf contextMenu1.SourceControl Is pictureBox1 Then
' Add the MenuItem to display for the PictureBox.
contextMenu1.MenuItems.Add(menuItem3)
End If
End Sub 'MyPopupEventHandler '
private void MyPopupEventHandler(System.Object sender, System.EventArgs e)
{
// Define the MenuItem objects to display for the TextBox.
MenuItem menuItem1 = new MenuItem("&Copy");
MenuItem menuItem2 = new MenuItem("&Find and Replace");
// Define the MenuItem object to display for the PictureBox.
MenuItem menuItem3 = new MenuItem("C&hange Picture");
// Clear all previously added MenuItems.
contextMenu1.MenuItems.Clear();
if(contextMenu1.SourceControl == textBox1)
{
// Add MenuItems to display for the TextBox.
contextMenu1.MenuItems.Add(menuItem1);
contextMenu1.MenuItems.Add(menuItem2);
}
else if(contextMenu1.SourceControl == pictureBox1)
{
// Add the MenuItem to display for the PictureBox.
contextMenu1.MenuItems.Add(menuItem3);
}
}
private:
void MyPopupEventHandler( System::Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
// Define the MenuItem objects to display for the TextBox.
MenuItem^ menuItem1 = gcnew MenuItem( "&Copy" );
MenuItem^ menuItem2 = gcnew MenuItem( "&Find and Replace" );
// Define the MenuItem object to display for the PictureBox.
MenuItem^ menuItem3 = gcnew MenuItem( "C&hange Picture" );
// Clear all previously added MenuItems.
contextMenu1->MenuItems->Clear();
if ( contextMenu1->SourceControl == textBox1 )
{
// Add MenuItems to display for the TextBox.
contextMenu1->MenuItems->Add( menuItem1 );
contextMenu1->MenuItems->Add( menuItem2 );
}
else if ( contextMenu1->SourceControl == pictureBox1 )
{
// Add the MenuItem to display for the PictureBox.
contextMenu1->MenuItems->Add( menuItem3 );
}
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
Reference