public static bool Extend(ITopology pTopology, ITopologyErrorFeature pTopoErrorFeat)
{
IFeatureClass class2 = (pTopology as IFeatureClassContainer).get_ClassByID(pTopoErrorFeat.OriginClassID);
IFeatureClass class3 = null;
try
{
if (pTopoErrorFeat.DestinationClassID != 0)
{
class3 = (pTopology as IFeatureClassContainer).get_ClassByID(pTopoErrorFeat.DestinationClassID);
}
}
catch
{
}
IFeature feature = null;
if (pTopoErrorFeat.TopologyRuleType == esriTopologyRuleType.esriTRTLineNoDangles)
{
feature = class2.GetFeature(pTopoErrorFeat.OriginOID);
IPoint shape = (pTopoErrorFeat as IFeature).Shape as IPoint;
IPolyline polyline = feature.Shape as IPolyline;
double num = CommonHelper.distance(polyline.FromPoint, shape);
double num2 = CommonHelper.distance(polyline.ToPoint, shape);
ISegmentCollection segments = polyline as ISegmentCollection;
ILine inLine = null;
IConstructLine line2 = new LineClass();
if (num < num2)
{
inLine = segments.get_Segment(0) as ILine;
line2.ConstructExtended(inLine, esriSegmentExtension.esriExtendAtFrom);
}
else
{
inLine = segments.get_Segment(segments.SegmentCount - 1) as ILine;
line2.ConstructExtended(inLine, esriSegmentExtension.esriExtendAtTo);
}
IPolyline polyline2 = new PolylineClass();
object before = Missing.Value;
(polyline2 as ISegmentCollection).AddSegment(line2 as ISegment, ref before, ref before);
ISpatialFilter filter = new SpatialFilterClass
{
Geometry = polyline2,
SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects
};
IFeatureCursor o = class2.Search(filter, false);
ITopologicalOperator operator2 = polyline2 as ITopologicalOperator;
IFeature feature3 = o.NextFeature();
bool flag = true;
double num3 = 0.0;
ICurve toCurve = null;
IPoint splitPoint = null;
IFeature feature4 = null;
while (feature3 != null)
{
if (feature3.OID != feature.OID)
{
double num4;
IGeometry geometry2 = operator2.Intersect(feature3.Shape,
esriGeometryDimension.esriGeometry0Dimension);
if (geometry2 is IPoint)
{
num4 = CommonHelper.distance(geometry2 as IPoint, shape);
if (flag)
{
flag = false;
num3 = num4;
splitPoint = geometry2 as IPoint;
toCurve = feature3.Shape as ICurve;
feature4 = feature3;
}
else if (num3 > num4)
{
num3 = num4;
splitPoint = geometry2 as IPoint;
toCurve = feature3.Shape as ICurve;
feature4 = feature3;
}
}
if (geometry2 is IPointCollection)
{
IPointCollection points = geometry2 as IPointCollection;
for (int i = 0; i < points.PointCount; i++)
{
IPoint point3 = points.get_Point(i);
num4 = CommonHelper.distance(point3, shape);
if (flag)
{
flag = false;
num3 = num4;
splitPoint = point3;
toCurve = feature3.Shape as ICurve;
feature4 = feature3;
}
else if (num3 > num4)
{
num3 = num4;
splitPoint = point3;
toCurve = feature3.Shape as ICurve;
feature4 = feature3;
}
}
}
}
feature3 = o.NextFeature();
}
ComReleaser.ReleaseCOMObject(o);
if (toCurve != null)
{
bool flag3;
int num6;
int num7;
IConstructCurve curve2 = new PolylineClass();
ICurve fromCurve = feature.Shape as ICurve;
bool extensionsPerformed = true;
if (num < num2)
{
curve2.ConstructExtended(fromCurve, toCurve, 16, ref extensionsPerformed);
}
else
{
curve2.ConstructExtended(fromCurve, toCurve, 8, ref extensionsPerformed);
}
if (!(curve2 as IGeometry).IsEmpty)
{
feature.Shape = curve2 as IGeometry;
feature.Store();
}
(toCurve as IPolycurve).SplitAtPoint(splitPoint, true, false, out flag3, out num6, out num7);
feature4.Shape = toCurve;
feature4.Store();
return(true);
}
}
return(false);
}
