topic Re: How to get a single feature from an object id in ArcGIS Pro SDK Questions

How to get a single feature from an object id

DaveLewis73 — Wed, 27 Apr 2022 14:24:22 GMT

I have what I believe to be a very simple question, but I cannot find an answer for it. Is there a method of getting a single feature from an object id (OID)? In ArcObjects this can be accomplished by simply calling GetFeature() on a feature class object and passing in an object id. An example would be IFeature feature = featClass.GetFeature(100).

Re: How to get a single feature from an object id

Aashis — Wed, 27 Apr 2022 16:36:36 GMT

You can search by ObjectId using QueryFilter.

public void SearchFC(FeatureClass featureClass, IReadOnlyList<long> objectIDs) { QueryFilter queryFilter = new QueryFilter() { ObjectIDs = objectIDs }; using (RowCursor rowCursor = featureClass.Search(queryFilter)) { while (rowCursor.MoveNext()) { using (Feature feature = rowCursor.Current as Feature) { // use feature } } } }

Re: How to get a single feature from an object id

DaveLewis73 — Wed, 27 Apr 2022 16:46:33 GMT

Yeah, that is the direction that I figured that I would have to go. I ended up writing a function that uses a QueryFilter:

internal Task<int> GetMaxCellNumber()
{
return QueuedTask.Run<int>(() =>
{
FeatureClass featClass = GridLayer.GetFeatureClass();
int num = featClass.GetCount();
List<long> oids = new List<long>();
oids.Add(checked(num - 1));
IReadOnlyList<long> objectIDs = oids.AsReadOnly();
QueryFilter queryFilter = new QueryFilter()
{
ObjectIDs = objectIDs
};
RowCursor cursor = featClass.Search(queryFilter);
Row row = null;
if (cursor.MoveNext())
row = cursor.Current;

if (row == null)
return 0;

return (int)row["Cell_Num"];

});
}

Does this seem like a good solution or can it be made simpler? It just seems a little clunky.

Re: How to get a single feature from an object id

Stefan_Offermann — Fri, 13 Sep 2024 07:41:24 GMT

I also am looking for this one-liner as I know this was so easy to use in ArcObjects. Creating a filter and cursor object seems to bloating when comparing it to good ol' featClass.GetFeature(oid) 😐

Re: How to get a single feature from an object id

GKmieliauskas — Fri, 13 Sep 2024 10:37:51 GMT

Hi,

You can use Inspector class Load method. There is Load method overload Load(Table,Int64) where parameters are table/featureclass and objectid. Then you can read attributes and geometry using inspector object.