Split the feature by updating the split feature and creating new feature(s) for the smaller portion.
[Visual Basic .NET] Public Function SplitWithUpdate ( _ ByVal Geometry As IGeometry _ ) As ISet
[C#] public ISet SplitWithUpdate ( IGeometry Geometry );
[C++]
HRESULT SplitWithUpdate(
IGeometry* Geometry,
ISet** newFeatures
);
[C++]Parameters
Geometry [in]Geometry is a parameter of type IGeometry
newFeatures [out, retval]newFeatures is a parameter of type ISet
Product Availability
Remarks
SplitWithUpdate divides polylines by points or polygons by polylines, other kinds of split geometries are not supported (see IGeometry::GeometryType property for an enumeration of geometry types). Unlike the IFeatureEdit::Split method, SplitWithUpdate does not delete the original feature and insert two new features. When a feature is split, its geometry is modified and a new feature, with a new ObjectID, is inserted comprised of the remaining geometry. The geometry of the original feature will be modified to represent the largest section of the split geometry. For example, if a polyline is split at 60% along its length, the original feature's geometry will be modified to represent the 60% section and a new feature will be created with a geometry representing the remaining 40%.
You can define a policy on how the other attribute values of the new features are populated; this can be done with ArcCatalog or by using the Domain and Attribute Rule objects.
It is not necessary to call SplitAttributes after calling Split, this is done automatically.
All edits to features that participate in a Topology or Geometric Network must be performed within an edit session and bracketed within an edit operation.