public MapItemCollection ChildItems { get; }

Public ReadOnly Property ChildItems As MapItemCollection

Field Value

Implements

This collection is used to drive the content of the Map in the ArcGIS Explorer Application. Each derived MapItem type can be thought of as a building block of map content. When you add a MapItem to Map.ChildItems it appears in the ArcGIS Explorer table of contents, and if the MapItem has associated data or graphics, they will be displayed in the Map.

The order of the Map.ChildItems collection dictates the order in which items are presented in the ArcGIS Explorer contents window. By default, items are added to the end of the collection and will display at the bottom of the content hierarchy. If you wish to add items to the top of the hierarchy use the AddFirst method.

The order of the collection does not influence drawing order of map content; this is initially determined by the MapItem type:

• An ImageOverlay MapItem represents an image positioned in relation to the map window. ImageOverlays are drawn on top of all other MapItem types. If your map contains more than one overlay, you can use the ImageOverlayDrawingOrder property to change the overlay drawing order.
• A Note is a type of map content, that represents a Graphic associated with a Popup. Graphics are drawn underneath ImageOverlay objects, but on top of all layers in the map.
• The Layer classes are a subset of MapItems that reference geographic data. When a Layer is added to the map, the related data is draped over the basemap or, if applicable, used as a terrain elevation source in 3D. If your map contains more than one layer, you can use the LayerDrawingOrder property to change the layer drawing order.

The table below gives a brief description of each MapItem type that can be added to Map.ChildItems:

There are several MapItem types that cannot be added to a Map independently:

The contents of Map.ChildItems are persisted to a map file (.nmf) when the map is saved.