ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Editing Namespace / EditOperation Class / Merge Method / Merge(EditingRowTemplate,Layer,IEnumerable<Int64>) Method
The template to create the new merged feature with.
The layer of the source features to merge.
The oids of the source features to merge.
Example Version

Merge(EditingRowTemplate,Layer,IEnumerable<Int64>) Method
Merge features into a new feature defined by a feature template.
Syntax

Parameters

template
The template to create the new merged feature with.
sourceLayer
The layer of the source features to merge.
sourceOIDs
The oids of the source features to merge.
Exceptions
ExceptionDescription
Template, sourceLayer, sourceOIDs cannot be null. List of ObjectIDs cannot be empty
Remarks
The template can be in a different layer from the source.
Example
Edit Operation Merge Features
var mergeFeatures = new EditOperation() { Name = "Merge Features" };

//Merge three features into a new feature using defaults
//defined in the current template
//At 2.x -
//mergeFeatures.Merge(this.CurrentTemplate as EditingFeatureTemplate, featureLayer, new List<long>() { 10, 96, 12 });
mergeFeatures.Merge(this.CurrentTemplate as EditingRowTemplate, featureLayer, new List<long>() { 10, 96, 12 });

//Merge three features into a new feature in the destination layer
mergeFeatures.Merge(destinationLayer, featureLayer, new List<long>() { 10, 96, 12 });

//Use an inspector to set the new attributes of the merged feature
var inspector = new Inspector();
inspector.Load(featureLayer, oid);//base attributes on an existing feature
//change attributes for the new feature
inspector["NAME"] = "New name";
inspector["DESCRIPTION"] = "New description";

//Merge features into a new feature in the same layer using the
//defaults set in the inspector
mergeFeatures.Merge(featureLayer, new List<long>() { 10, 96, 12 }, inspector);

//Execute to execute the operation
//Must be called within QueuedTask.Run
if (!mergeFeatures.IsEmpty)
{
  var result = mergeFeatures.Execute(); //Execute and ExecuteAsync will return true if the operation was successful and false if not
}

//or use async flavor
//await mergeFeatures.ExecuteAsync();
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also