determine which renderer is set on a raster layer in ArcObjects

KarstenVennemann — Wed, 05 Nov 2014 01:45:44 GMT

I am trying to use ArcObjects (Visual Basic) to loop through the map layers in an ArcGIS desktop *.mxd document and read the renderers that are attached to the existing layers (want to use Raster layers). Can anyone tell me how to read (not set ) the property of a layer (or data set) which renderer is attached to it currently ? I found tons of examples how to set a renderer it but I need instead to read what is set already. The next step I need to get the b colors for the classes in the renderer. If anyone has a code example (no matter which programming language that would be terrific

Thanks Karsten

Re: determine which renderer is set on a raster layer in ArcObjects

DuncanHornby — Fri, 07 Nov 2014 10:33:44 GMT

The following VBA code shows you how to get a handle on a raster layers renderer:

Public Sub test()

' Get document

Dim pmxd As IMxDocument

Set pmxd = ThisDocument

' Get map

Dim pmap As IMap

Set pmap = pmxd.FocusMap

' Get first layer (assumed to be raster)

Dim pLayer As ILayer

Set pLayer = pmap.Layer(0)

' QI into rasterlayer

Dim pRasterLayer As IRasterLayer

Set pRasterLayer = pLayer

' Get renderer

Dim pRasterRenderer As IRasterRenderer

Set pRasterRenderer = pRasterLayer.Renderer

' Test renderer type and report

If TypeOf pRasterRenderer Is IRasterStretchColorRampRenderer Then

Debug.Print "stretchy!"

Dim pRasterStretchColorRampRenderer As IRasterStretchColorRampRenderer

Set pRasterStretchColorRampRenderer = pRasterRenderer

Debug.Print pRasterStretchColorRampRenderer.LabelHigh

End If

End Sub

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determine which renderer is set on a raster layer in ArcObjects

Re: determine which renderer is set on a raster layer in ArcObjects