ArcEngine 删除线、面重叠节点

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//删除要素重叠节点
public bool DelOverlapVertex(IWorkspace workspace, string strTable, IProgressor progressor)
{bool result;try{IWorkspaceEdit workspaceEdit = null;IFeatureWorkspace featureWorkspace = workspace as IFeatureWorkspace;IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(strTable);switch (featureClass.ShapeType){case 3:this.DelLineOverlapVertex(featureClass, progressor);break;case 4:this.DelAreaOverlapVertex(featureClass, progressor);break;default:MessageBox.Show("删除多余节点，不支持的要素类型");break;}if (workspaceEdit != null){workspaceEdit.StopEditOperation();workspaceEdit.StopEditing(true);ComReleaser.ReleaseCOMObject(workspaceEdit);}return true;}catch (Exception ex){Trace.WriteLine(ex.Message);result = false;}return result;
}///删除面要素重复节点
public string DelAreaOverlapVertex(IFeatureClass featureClass, IProgressor progressor)
{progressor.Message = "删除重叠节点";featureClass.FeatureCount(null);StringBuilder stringBuilder = new StringBuilder();IFeatureCursor featureCursor = featureClass.Search(null, true);int num = featureCursor.FindField("OBJECTID");for (IFeature feature = featureCursor.NextFeature(); feature != null; feature = featureCursor.NextFeature()){progressor.Step();int num2 = (int)feature.get_Value(num);IPolygon4 polygon = feature.ShapeCopy as IPolygon4;IGeometryBag exteriorRingBag = polygon.ExteriorRingBag;IEnumGeometry enumGeometry = exteriorRingBag as IEnumGeometry;enumGeometry.Reset();int num3 = -1;for (IRing ring = enumGeometry.Next() as IRing; ring != null; ring = (enumGeometry.Next() as IRing)){IGeometryBag geometryBag = polygon.get_InteriorRingBag(ring);int num4 = polygon.get_InteriorRingCount(ring);IEnumGeometry enumGeometry2 = geometryBag as IEnumGeometry;enumGeometry2.Reset();bool flag = false;for (;;){ISegmentCollection segmentCollection;if (flag){if (num4 == 0){break;}IRing ring2 = enumGeometry2.Next() as IRing;if (ring2 == null){break;}num3++;segmentCollection = (ring2 as ISegmentCollection);}else{num3++;segmentCollection = (ring as ISegmentCollection);}IPointCollection pointCollection = segmentCollection as IPointCollection;IPoint point = pointCollection.get_Point(0);for (int i = 1; i < pointCollection.PointCount; i++){IPoint point2 = pointCollection.get_Point(i);double num5 = Math.Sqrt(Math.Pow(point2.X - point.X, 2.0) + Math.Pow(point2.Y - point.Y, 2.0));if (num5 <= 0.001){pointCollection.RemovePoints(i, 1);stringBuilder.AppendLine(string.Concat(new object[]{num2,"号图形part",num3,"删除了第",i,"个节点。"}));i--;}else{point = point2;}}polygon.SimplifyPreserveFromTo();flag = true;}}feature.Shape = polygon;feature.Store();}ComReleaser.ReleaseCOMObject(featureCursor);return stringBuilder.ToString();
}///删除线重叠节点
public string DelLineOverlapVertex(IFeatureClass featureClass, IProgressor progressor)
{progressor.Message = "删除重叠节点";featureClass.FeatureCount(null);StringBuilder stringBuilder = new StringBuilder();IFeatureCursor featureCursor = featureClass.Search(null, true);int num = featureCursor.FindField("OBJECTID");int num2 = 0;for (IFeature feature = featureCursor.NextFeature(); feature != null; feature = featureCursor.NextFeature()){progressor.Step();int num3 = (int)feature.get_Value(num);IPolyline4 polyline = feature.ShapeCopy as IPolyline4;polyline.SimplifyNetwork();IPointCollection pointCollection = polyline as IPointCollection;IPoint point = pointCollection.get_Point(0);for (int i = 1; i < pointCollection.PointCount; i++){IPoint point2 = pointCollection.get_Point(i);double num4 = Math.Sqrt(Math.Pow(point2.X - point.X, 2.0) + Math.Pow(point2.Y - point.Y, 2.0));if (num4 <= 0.001){pointCollection.RemovePoints(i, 1);stringBuilder.AppendLine(string.Concat(new object[]{num3,"号图形删除了第",i,"个节点。"}));i--;num2++;}else{point = point2;}}polyline.SimplifyNetwork();feature.Shape = polyline;feature.Store();}ComReleaser.ReleaseCOMObject(featureCursor);stringBuilder.AppendLine("共有" + num2.ToString() + "个节点被删除");return stringBuilder.ToString();
}

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