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Gets or sets the sort order of the items in the slicer.
Use this property to retrieve whether slicer items are currently sorted in ascending or descending order.
SlicerSortOrder SortItems { get; set; }
Property SortItems As SlicerSortOrder
object[,] sourceData = {{"Category"}, {"Fruit"}, {"Vegetables"}};
worksheet.Range["A1:A3"].Value = sourceData;
ITable table = worksheet.Tables.Add(worksheet.Range["A1:A3"], true);
ISlicerCache slicerCache = workbook.SlicerCaches.Add(table, "Category", "categoryCache");
slicerCache.SortItems = SlicerSortOrder.Descending;
SlicerSortOrder sortOrder = slicerCache.SortItems;