topic Re: Making a group layer (or layer) in memory in ArcGIS Pro SDK Questions

Making a group layer (or layer) in memory

Vidar — Thu, 16 Apr 2020 17:12:37 GMT

I know you can use this method for creating a group layer:

   LayerFactory.Instance.CreateGroupLayer(map, 0, "mygrouplayer");

This seems to instantly create a group layer in the map, but, is there a way to create a group layer without it being instantly created and then add it in later?, i.e. create it in memory first.

Re: Making a group layer (or layer) in memory

Anonymous User — Thu, 16 Apr 2020 19:30:36 GMT

Have you considered creating a CIMGroupLayer, populating it with what you need, then turning it into a layer by calling CreateGroupLayer followed by GroupLayer.SetDefinition ?

Re: Making a group layer (or layer) in memory

UmaHarano — Thu, 16 Apr 2020 19:51:46 GMT

Hi Simon

LayerDocument class allows you to configure a layer's properties prior to adding it to the map. You can either create a new LayerDocument (using the available constructors) from an existing lyrx file or an existing feature layer in a map. Note: You also have the option of creating a blank LayerDocument and configuring all the properties from scratch if you want. But this is rare.

You can then use the configured LayerDocument and Create a layer (or Group Layer) using the CreateLayer method. The specific overload you will need is this:

https://pro.arcgis.com/en/pro-app/sdk/api-reference/index.html#topic26527.html

I will post a snippet on how to do this if you need further help with this.

Thanks

Uma

Re: Making a group layer (or layer) in memory

Vidar — Fri, 17 Apr 2020 08:52:15 GMT

The link https://pro.arcgis.com/en/pro-app/sdk/api-reference/index.html#topic26527.html

doesn't seem to work - I get the following in the browser:

Re: Making a group layer (or layer) in memory

Vidar — Fri, 17 Apr 2020 08:54:11 GMT

Not in the slightest - wasn't aware of that at all - but I will have a dig around on what you describe.

Thanks Kirk.

Re: Making a group layer (or layer) in memory

DanPatterson_Retired — Fri, 17 Apr 2020 09:04:19 GMT

The link seems to be different

Your link as shown

https://pro.arcgis.com/en/pro-app/sdk/api-reference/index.html#topic26527.html

Where it links to

" https://prodev.arcgis.com/en/pro-app/sdk/api-reference/index.html#topic26527.html "

when you examine its link versus the text.

Try editing the link to see if that is the issue

Re: Making a group layer (or layer) in memory

UmaHarano — Fri, 17 Apr 2020 13:49:47 GMT

The links should work now. I have edited the typos.

Also, in the ProSnippets: Map Authoring page there are 3 code snippets that use the LayerDocument to configure Feature Layers prior to adding it to the map. They create FeatureLayers, but the concept to create Group Layers is similar.

Thanks