How to identify grids are 2D or 3D?

[preeti.kumari9TBN6]

public static void AnalyzeGridsInSheetViews(Document doc, List<ViewSheet> selectedSheets)

        {

            // Dictionary to store results

            Dictionary<string, List<string>> sheetGridSummary = new Dictionary<string, List<string>>();

            foreach (ViewSheet sheet in selectedSheets)

            {

                List<string> summaryList = new List<string>();

                // Collect all viewports on this sheet

                var viewports = new FilteredElementCollector(doc, sheet.Id)

                    .OfClass(typeof(Viewport))

                    .Cast<Viewport>()

                    .ToList();

                foreach (Viewport vp in viewports)

                {

                    View view = doc.GetElement(vp.ViewId) as View;

                    if (view == null) continue;

                    // Collect grids visible in the current view

                    var grids = new FilteredElementCollector(doc, view.Id)

                        .OfClass(typeof(Grid))

                        .Cast<Grid>()

                        .ToList();

                    int count2D = 0;

                    int count3D = 0;

                    foreach (Grid grid in grids)

                    {

                       var type= grid.GetType();

                        IList<Curve> viewCurves = grid.GetCurvesInView(DatumExtentType.ViewSpecific, view);

                        IList<Curve> modelCurves = grid.GetCurvesInView(DatumExtentType.Model, view);

                    if(viewCurves.Count>0 )

                        {

                           count2D++;

                        }

                        else

                        {

                            count3D++;

                        }

                        //if (extentData == null)

                        //    continue;

                        //bool is2D = extentData.IsViewSpecific;   // True if the grid is 2D in that view

                        //bool is3D = !extentData.IsViewSpecific;  // False means it’s 3D

                        //                                         //#endif

                        //if (is2D && !is3D)

                        //    count2D++;

                        //else if (is3D)

                        //    count3D++;

                    }

                    string summary = $"View: {view.Name} → 2D Grids: {count2D}, 3D Grids: {count3D}";

                    summaryList.Add(summary);

                }

                sheetGridSummary[sheet.Name] = summaryList;

            }

            // Print or log results

            foreach (var kvp in sheetGridSummary)

            {

                TaskDialog.Show("Grid Summary",

                    $"Sheet: {kvp.Key}\n" + string.Join("\n", kvp.Value));

            }

        }Bt for both data are coming modelCurves and viewCurves. I have read 2D grids are viewSpecific.

[ctm_mka]

First, curious what your need for this type of info is. Second, they are both 3d and 2d, with the Caveat of the 2d being only when cropped by a view, or the user has changed it to 2d (by clicking on the 3d symbol). Third, i would look at the length of line between the model and view specific options as shown. Finally, dont forget about multi segment grids! each segment is a grid itself.