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View this topic on docs.devexpress.com (Learn more)

Loading Panel

When the ASPxTreeView control's ASPxTreeView.AutoPostBack property is set to false, and the ASPxTreeView.EnableCallBacks property is set to true, the first expansion of a node initiates a callback to the server to obtain the node's child nodes. In this case, a specific Loading Panel is displayed for the child content of the node being expanded while waiting for a callback response.

Upon the TreeViewSettingsLoadingPanel.Mode property value, a loading panel can be displayed either at the center of ASPxTreeView (TreeViewLoadingPanelMode.ShowAsPopup) or near the expanding node (in place of the expand button) (TreeViewLoadingPanelMode.ShowNearNode).

ShowAsPopup ShowNearNode

The table below lists the main members that affect the appearance of a Loading Panel and the way in which it functions.






ImagesBase.LoadingPanel, TreeViewImages.NodeLoadingPanel

Image's Visibility


Image's Position




Expanded See Also

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