TreeListView.ShowingNodeFooter Event
In This Article
Fires for each parent node before showing its node footer.
Namespace: DevExpress.Xpf.Grid
Assembly: DevExpress.Xpf.Grid.v24.2.dll
NuGet Package: DevExpress.Wpf.Grid.Core
#Declaration
#Event Data
The ShowingNodeFooter event's data class is TreeListShowingNodeFooterEventArgs. The following properties provide information specific to this event:
Property | Description |
---|---|
Allow |
Gets or sets whether the operation is allowed.
Inherited from Tree |
Handled |
Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route.
Inherited from Routed |
Is |
Gets whether the processed node is a root node. |
Node |
Gets the processed node.
Inherited from Tree |
Original |
Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.
Inherited from Routed |
Routed |
Gets or sets the Routed |
Row |
Gets the processed row.
Inherited from Tree |
Source |
Gets or sets a reference to the object that raised the event.
Inherited from Routed |
The event data class exposes the following methods:
Method | Description |
---|---|
Invoke |
When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation.
Inherited from Routed |
On |
When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.
Inherited from Routed |
#Remarks
Handle this event to prevent the TreeListView from displaying any node footers.
The code sample below demonstrates how to prevent showing node footers for those nodes that have a single child.
private void OnShowingNodeFooter(object sender, DevExpress.Xpf.Grid.TreeList.TreeListShowingNodeFooterEventArgs e) {
if(e.IsRootNode || e.Node.Nodes.Count(node => node.IsVisible) == 1)
e.Allow = false;
}
See Also