topic Re: Is there a way to turn layers on and off similar to the Switching Basemaps sample in ArcGIS API for Flex Questions

Is there a way to turn layers on and off similar to the Switching Basemaps sample?

BrendanLee — Thu, 08 Jul 2010 22:17:54 GMT

I want to use a toggle button bar to turn layers on/off similar to the Switching Basemaps sample.

I would have 3 options (zone 1, zone 2, zone 3) and would need to turn layers on/off based on the selection. I have one dynamic map service that has layers for all 3 zones...I don't want to make a map service for each.

Are there any examples/samples on how to do this?

Thanks!

Re: Is there a way to turn layers on and off similar to the Switching Basemaps sample

TonyCollins — Fri, 09 Jul 2010 07:01:55 GMT

Hi there,

Check out visibleLayers which is an ArrayCollection on your ArcGISDynamicMapServiceLayer. There should be some examples in the API samples section.

I want to use a toggle button bar to turn layers on/off similar to the Switching Basemaps sample.

I would have 3 options (zone 1, zone 2, zone 3) and would need to turn layers on/off based on the selection. I have one dynamic map service that has layers for all 3 zones...I don't want to make a map service for each.

Are there any examples/samples on how to do this?

Thanks!

Re: Is there a way to turn layers on and off similar to the Switching Basemaps sample

BrendanLee — Tue, 13 Jul 2010 15:24:36 GMT

Easy enough. Got that working.

Now is there a way to set the alpha on individual layers? I want some layers to be 100% and then others to be 60%.

Re: Is there a way to turn layers on and off similar to the Switching Basemaps sample

DasaPaddock — Wed, 14 Jul 2010 17:26:39 GMT

This isn't possible with a single ArcGISDynamicMapServiceLayer, but you could create a separate ArcGISDynamicMapServiceLayer for each layer and then set alpha on each one.