topic Re: Change GraphicsLayer Z Index in ArcGIS API for Silverlight Questions

Change GraphicsLayer Z Index

FrancoisChartrand — Fri, 18 Mar 2011 20:05:04 GMT

Hi,

I know about Graphic.SetZIndex and Graphic.GetZIndex. These methods allow to change the Z index of Graphics in a layer. However, these methods don't exist for the Layer itself.

How should I control the Z index for all my different GraphicsLayers? It seems to be related to the order in which my layers are added to the map.

Thank you

Re: Change GraphicsLayer Z Index

FrancoisChartrand — Wed, 23 Mar 2011 17:45:32 GMT

Any idea anybody?

This is really annoying. I have two GraphicLayers: GL1 and GL2. The graphics from GL1 are drawn over graphics from GL2 because GL1 is added first to Map Control.

How can I control that?

Re: Change GraphicsLayer Z Index

FrancoisChartrand — Sat, 11 Dec 2021 10:43:49 GMT

I found a way to do it. It is not really clean, but at least it works...

public void MoveUpLayer(Layer layer)
{
    int index = Map.Layers.IndexOf(layer);
    if (index < 0)
        return;

    Map.Layers.RemoveAt(index);
    Map.Layers.Insert(index - 1, layer);
}

public void MoveDownLayer(Layer layer)
{
    int index = Map.Layers.IndexOf(layer);
    if (index < 0)
        return;

    Map.Layers.RemoveAt(index);
    Map.Layers.Insert(index + 1, layer);
}

I don't know if ArcGIS developers are reading these posts, but they should consider adding SetZIndex and GetZIndex to the Layer class. It would be a lot cleaner...

Re: Change GraphicsLayer Z Index

JenniferNery — Thu, 24 Mar 2011 15:52:22 GMT

This is correct. The only way you can change the order of your layers is to add/remove them from your Map.Layers.

Graphic.SetZIndex() only applies to features belonging to the same layer.

Re: Change GraphicsLayer Z Index

SurajPatil — Wed, 10 Aug 2016 10:32:18 GMT

Yeah..indeed its a real pain of not having those SetZIndex and GetZIndex methods for the Graphics Layer.