IMap.Layer Property (ArcObjects .NET 10.6 SDK)
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.

See Also

IMap Interface | IMap.LayerCount Property

.NET Snippets

Get GeoFeatureLayer from Layer Index Number | TimeControl Playback | Get Index Number from Layer Name | Set Data Source | Get FeatureLayer from Layer Index Number | Toggle Visibility Of Composite Layer

.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

Converting labels to geodatabase annotation for a single layer | Converting labels to map annotation for a single layer | How to create an edit session | How to use symbol level drawing | Managing application state | Persisting cache information for use in dynamic display