topic Re: WMSLayer change transparency in ULR request in .NET Maps SDK Questions

WMSLayer change transparency in ULR request

JoachimNitschke1 — Sat, 11 Dec 2021 20:09:17 GMT

Hi folks,

I'm using ArcGis Runtime for .NET 10.2.04 to display maps from a WMS server. Instead of a colored background our map always has a white background.

When I check the URL that the Esri framework produces using Fiddler, the result is as following:

GET /?SERVICE=WMS&REQUEST=GetMap&WIDTH=1920&HEIGHT=1080&FORMAT=image%2Fpng&LAYERS=ENC
&STYLES=&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&VERSION=1.3.0&CRS=EPSG:3857&
BBOX=1114445.90347981,7073109.69570739,1210966.09652019,7127402.30429261 HTTP/1.1

As you can see, the request sent to the server has set "TRANSPARENT=TRUE". I need to change this to FALSE otherwise the server returns an image with a transparent background. How do I change this property in XAML or code? Setting the opacy property on the layer doesn't change the URL-request.

Kind Regards,

Eugen

Re: WMSLayer change transparency in ULR request

DominiqueBroux — Wed, 11 Feb 2015 16:18:16 GMT

This property is not exposed by the API, so there is unfortunately no mean to change it.

We'll consider that for a future version.

Thanks

Re: WMSLayer change transparency in ULR request

dotMorten_esri — Wed, 11 Feb 2015 16:52:29 GMT

As a workaround you could try and set the format to JPEG which doesn't support transparency. We assume that if you're using PNG that you are interested in using the transparency that format offers.

Re: WMSLayer change transparency in ULR request

DominiqueBroux — Wed, 11 Feb 2015 18:57:49 GMT

Great idea

Re: WMSLayer change transparency in ULR request

JoachimNitschke1 — Thu, 12 Feb 2015 09:11:29 GMT

Thanks for the tip! Indeed a nice idea. Sadly it didn't solve the problem. The Jpegs are rendered with a white background according to the request paramter "BGCOLOR=0xFFFFFF". I guess this parameter isn't exposed by the API either..?

Kind regards

Joachim

Re: WMSLayer change transparency in ULR request

DominiqueBroux — Fri, 13 Feb 2015 07:56:26 GMT

I confirm that it's not exposed by the API either. Sorry.