How to: Customize the Context Menu at Runtime (legacy)

• Aug 03, 2020
• 3 minutes to read

Note

You are viewing documentation for the legacy WPF Scheduler control. If you’re starting a new project, we strongly recommend that you use a new control declared in the DevExpress.Xpf.Scheduling namespace. If you decide to upgrade an existing project in order to switch to the updated scheduler control, see the Migration Guidelines document.

This example demonstrates how to customize the SchedulerControl’s context menu at runtime by removing the New Recurring Appointment menu item from the Default Popup Menu, and adding a custom item instead.

Handle the SchedulerControl.PopupMenuShowing event. In the event handler, use the SchedulerMenuEventArgs.Menu property to determine whether the default popup menu raised an event, and modify the SchedulerMenuEventArgs.Customizations collection to add or remove popup menu items.

MainWindow.xaml

<dxsch:SchedulerControl Name="schedulerControl1"
                        HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
                        PopupMenuShowing="schedulerControl1_PopupMenuShowing">

MainWindow.xaml.cs

private void schedulerControl1_PopupMenuShowing(object sender, SchedulerMenuEventArgs e) {
    // Check whether this event was raised for a default popup menu of the Scheduler control.
    if (e.Menu.Name == SchedulerMenuItemName.DefaultMenu)
    {
        for (int i = 0; i < e.Menu.Items.Count; i++)
        {
            SchedulerBarItem menuItem = e.Menu.Items[i] as SchedulerBarItem;
            if (menuItem != null)
            {
                if (menuItem != null && menuItem.Name == SchedulerMenuItemName.NewAllDayEvent)
                {
                    menuItem.Content = "Create All-Day Appointment";
                    break;
                }
            }
        }

        // Remove the New Recurring Event menu item using the Action approach.
        e.Customizations.Add(new RemoveBarItemAndLinkAction()
        {
            ItemName = SchedulerMenuItemName.NewRecurringEvent
        });

        // Create a custom menu item.
        BarButtonItem myMenuItem = new BarButtonItem();
        myMenuItem.Name = "customItem";
        myMenuItem.Content = "Item Added at Runtime";
        myMenuItem.ItemClick += new ItemClickEventHandler(customItem_ItemClick);

        // Insert a menu separator.
        e.Customizations.Add(new BarItemLinkSeparator());
        // Insert a new item into the Scheduler popup menu.
        e.Customizations.Add(myMenuItem);
    } 
}

private void customItem_ItemClick(object sender, ItemClickEventArgs e) {
    // Implement a custom action.
    MessageBox.Show(String.Format("{0} is clicked", e.Item.Name));
}

MainWindow.xaml.vb

Private Sub schedulerControl1_PopupMenuShowing(ByVal sender As Object, ByVal e As SchedulerMenuEventArgs)
    ' Check whether this event was raised for a default popup menu of the Scheduler control.
    If e.Menu.Name = SchedulerMenuItemName.DefaultMenu Then
        For i As Integer = 0 To e.Menu.Items.Count - 1
            Dim menuItem As SchedulerBarItem = TryCast(e.Menu.Items(i), SchedulerBarItem)
            If menuItem IsNot Nothing Then
                If menuItem IsNot Nothing AndAlso menuItem.Name = SchedulerMenuItemName.NewAllDayEvent Then
                    menuItem.Content = "Create All-Day Appointment"
                    Exit For
                End If
            End If
        Next i

        ' Remove the New Recurring Event menu item using the Action approach.
        e.Customizations.Add(New RemoveBarItemAndLinkAction() With {.ItemName = SchedulerMenuItemName.NewRecurringEvent})

        ' Create a custom menu item.
        Dim myMenuItem As New BarButtonItem()
        myMenuItem.Name = "customItem"
        myMenuItem.Content = "Item Added at Runtime"
        AddHandler myMenuItem.ItemClick, AddressOf customItem_ItemClick

        ' Insert a menu separator.
        e.Customizations.Add(New BarItemLinkSeparator())
        ' Insert a new item into the Scheduler popup menu.
        e.Customizations.Add(myMenuItem)
    End If
End Sub

Private Sub customItem_ItemClick(ByVal sender As Object, ByVal e As ItemClickEventArgs)
    ' Implement a custom action.
    MessageBox.Show(String.Format("{0} is clicked", e.Item.Name))
End Sub