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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
TreeView - Loading Panel TreeView - Near Loading Panel

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

Mode

TreeViewSettingsLoadingPanel.Mode

Text

SettingsLoadingPanel.Text

Image

ImagesBase.LoadingPanel, TreeViewImages.NodeLoadingPanel

Image's Visibility

SettingsLoadingPanel.ShowImage

Image's Position

SettingsLoadingPanel.ImagePosition

Styles

TreeViewStyles.LoadingPanel

See Also