ArcObjects Library Reference (Controls)

IMapControl4.Layer Property

[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** pLayer
);

[C++]
Parameters
index [in]
  index is a parameter of type long
pLayer [out, retval]
  pLayer is a parameter of type ILayer

Available with ArcGIS Engine.

[C#]

In C# use the get_Layer method, as indexed property accessors are not supported.

ILayer layer;
//First layer to draw
layer = (ILayer2) axMapControl1.get_Layer(0);
//Second layer to draw
layer = (ILayer2) axMapControl1.get_Layer(1);
//Last layer to draw
layer = (ILayer2) axMapControl1.get_Layer(axMapControl1.LayerCount - 1);

//Loop through a map's layer collection
ILayer layer;
for (int i=0; i<=axMapControl1.LayerCount-1; i++)
{
    layer = (ILayer) axMapControl1.get_Layer(i);
    System.Windows.Forms.MessageBox.Show(layer.Name);
    //Do something...
}

[Visual Basic .NET]

The IMapControl4, (and higher numbered IMapControl interfaces) and IMapControlDefault interfaces have a default indexed property called Layer. The Controls interop assembly which provides access to these interfaces have the default Layer property. However, if you are working directly with the AxControls class use the get_Layer method.

Dim pLayer As ILayer
'First layer to draw
pLayer = AxMapControl1.get_Layer(0)
'Second layer to draw
pLayer = AxMapControl1.get_Layer(1)
'Last layer to draw
 pLayer = AxMapControl1.get_Layer(AxMapControl1.LayerCount - 1)

'Loop through a map's layer collection
Dim i As Long
Dim pLayer As ILayer
For i = 0 To AxMapControl1.LayerCount - 1
  pLayer = AxMapControl1.get_Layer(i)
  'Do something...
Next i