ArcObjects Library Reference (Carto)

IMap.Layer Property

The layer at the given index.

[Visual Basic .NET]
Public Function get_Layer ( _
    ByVal Index As Integer _
) As ILayer

[C#]
public ILayer get_Layer (
    int Index
);

[C++]
HRESULT get_Layer(
  long Index,
  ILayer** Layer
);

[C++]

Parameters
Index [in]

  Index is a parameter of type long
Layer [out, retval]

  Layer is a parameter of type ILayer**

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Remarks

Maps are typically composed of numerous layers from various data sources. Use the Layer property to access a particular layer in a map. The collection of layers is 0-based. Use the Layer property in conjunction with the LayerCount property to loop through all the layers in the map.

The Layer property returns an ILayer reference; attempt a Query Interface to determine the type of layer object. For example, do not assume that all layers in a map are FeatureLayers. Valid layers are those that implement ILayer and IDataLayer.

Each Map also has a basic graphics layer (CompositeGraphicLayer) that is not comprised in the collection of layers returned by this property; a reference to this layer is obtainable through the BasicGraphicsLayer property.

.NET Snippets

.NET Samples

Convert part to feature command (Code Files: ConvertPart) | Editing using a custom form (Code Files: EditorForm) | Dynamic cache layer manager controller (Code Files: CacheManagerDlg) | Custom selection extension (Code Files: SelectionExtension) | Create a custom selection extension by extending ArcObjects (Code Files: SelectionExtension ZoomToLayerMultiItem)

.NET Related Topics