We do not have support for this directly in the public API and, as a minimum, I think we can add enabling/disabling symbol layer drawing, SLD, to the public API at 2.9.
_Configuring_ drawing order by symbol layer is not trivial and isnotsomething that really should be attempted via the public API and the CIM - though it is possible - the code would be very brittle. Any change to the symbology, eg changing a feature symbol definition or altering a unique value class, for example, could break any add-in code that was making assumptions about the structure of a given layer's symbology and renderer.
I recommend that you continue to configure the SLD order using the UI and when you have the symbology configured to your liking, save the layer out as a layer file (.lyrx).
It is a straightforward process to read the layer file via the API and apply the renderer with the correct SLD defined to an existing layer of the same schema - ProSnippet:Apply Symbology to a layer from a Layer file, - or to simply create a new layer based off the layer file -ProSnippet: Create layer from a lyrx file
Meanwhile, in lieu of having a dedicated public API method to enable/disable SLD, assuming that you do have a layer with symbol layer drawingconfigured(eg using one of the two techniques I mentioned above) - you can enable/disable it using the following code below:
在我的例子中,我系紧SLD on/off for a feature layer called "rivers". However, in my testing of this code, even though SLD was being toggled on the layer, the symbology UI did_not_update the "Enable symbol layer drawing" check box on the SLD pane. So we have a bug in Pro there that we also need to address. Please be aware of that. I am using Pro version 2.8.
protected override void OnClick() { var rivers = MapView.Active.Map.GetLayersAsFlattenedList() .OfType().FirstOrDefault(l => l.Name == "rivers"); if (rivers == null) return; QueuedTask.Run(() => { var def = rivers.GetDefinition() as CIMFeatureLayer; //def.SymbolLayerDrawing will be null if symbol layer drawing has not //previously been configured if (def.SymbolLayerDrawing != null) { //toggle symbol layer drawing on/off //TODO: Bug in UI. "Enable symbol layer drawing" checkbox does not update def.SymbolLayerDrawing.UseSymbolLayerDrawing = !def.SymbolLayerDrawing.UseSymbolLayerDrawing; rivers.SetDefinition(def);//commit } }); }
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