Skip to main content

ToolbarFormControl.Merge Event

Fires after title bars are merged.

Namespace: DevExpress.XtraBars.ToolbarForm

Assembly: DevExpress.XtraBars.v23.1.dll

NuGet Package: DevExpress.Win.Navigation


public event ToolbarFormMergeEventHandler Merge

Event Data

The Merge event's data class is ToolbarFormMergeEventArgs. The following properties provide information specific to this event:

Property Description
MergedChild Provides access to the child form’s title bar.
MergeOwner Provides access to the parent form’s title bar.


In an MDI application, when a child toolbar form is maximized, its bar items in the title bar are merged with the parent form’s bar items. Use the MdiMergeStyle property to specify whether bar items are merged when a child form is maximized, focused, or never merged.

The parent and child title bars fire the Merge and UnMerge events after the bar items are merged.


If the parent form and a child form contain bar items with equal captions (for example, File), you can remove the duplicated command from the merged title bar as the code below demonstrates.

private void ToolbarFormControl1_Merge(object sender, DevExpress.XtraBars.ToolbarForm.ToolbarFormMergeEventArgs e) {
        .GroupBy(x => x.Caption)
        .Where(x => x.Count() > 1)
        .ForEach(x => x
        .ForEach(y => {
            if (e.MergedChild.TitleItemLinks.Where(z => z.Item == y.Item).Count() != 0)
                y.Visible = false;
See Also