topic Re: North Arrow not changing in ArcGIS Pro SDK Questions

North Arrow not changing

mstranovsky — Fri, 31 Mar 2023 15:15:42 GMT

ArcGIS Pro 3.1 SDK addin is not changing the north arrow using this code:

// Add North Arrow
StyleProjectItem arcgis2dStyles = Project.Current.GetItems<StyleProjectItem>().First(si => si.Name == "ArcGIS 2D");
await QueuedTask.Run(() =>
{
NorthArrowStyleItem naStyleItem = arcgis2dStyles.SearchNorthArrows("ArcGIS North 13").FirstOrDefault();
MapFrame newFrame = layout_local.FindElement("New Map Frame") as MapFrame;
Coordinate2D nArrow = new Coordinate2D(3.6814, 0.6357);
var naInfo = new NorthArrowInfo()
{
MapFrameName = newFrame.Name,
NorthArrowStyleItem = naStyleItem
};
var newNorthArrow = ElementFactory.Instance.CreateMapSurroundElement(layout_local, nArrow.ToMapPoint(), naInfo);
});

I want this one:

But I get this one no matter what I put in here (SearchNorthArrows("ArcGIS North 13")):

Re: North Arrow not changing

CharlesMacleod — Fri, 31 Mar 2023 18:43:43 GMT

I cannot repro.

U can also try this as a workaround:

QueuedTask.Run(()=> { ... var naStyleItem = arcgis2dStyles.SearchNorthArrows("ArcGIS North 13").FirstOrDefault(); //get the item definition var cim_na = naStyleItem.GetObject() as CIMMarkerNorthArrow; ... var naInfo = new NorthArrowInfo() { MapFrameName = newFrame.Name, //NorthArrowStyleItem = naStyleItem }; var newNorthArrow = ElementFactory.Instance.CreateMapSurroundElement( layout_local, nArrow.ToMapPoint(), naInfo); //Apply the style var def = newNorthArrow.GetDefinition() as CIMMarkerNorthArrow; def.GraphicFrame = cim_na.GraphicFrame; def.PointSymbol = cim_na.PointSymbol; newNorthArrow.SetDefinition(def); });

Re: North Arrow not changing

mstranovsky — Fri, 31 Mar 2023 19:42:24 GMT

I tried it and receive this error:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

naStyleItem was null.

Re: North Arrow not changing

CharlesMacleod — Fri, 31 Mar 2023 20:31:00 GMT

that's why yours doesnt work then. Check your ArcGIS 2D style and why it doesnt contain a "ArcGIS North 13"