Hi, I have a line chart drawn with particular symbols in datapoints for each line.I have Used NULL Handling Dontplot for dropping the null points.

But it takes different symbols for the same line while dropping. Please find my code as below in FillSceneGraph,

  //To add symbols at datapoint in each line

                    SymbolIcon[] symbol_icons = new SymbolIcon[6];

                    symbol_icons[0] = SymbolIcon.Triangle;

                    symbol_icons[1] = SymbolIcon.Circle;

                    symbol_icons[2] = SymbolIcon.Diamond;

                    symbol_icons[3] = SymbolIcon.UpsideDownTriangle;

                    symbol_icons[4] = SymbolIcon.Plus;

                    symbol_icons[5] = SymbolIcon.Square;

                         foreach (Polyline polyline in allPolylines)

                    {

                        index = index == 5 ? 0 : index + 1;

                        foreach (DataPoint dataPoint in polyline.points)

                        {

                            Symbol symbol = new Symbol();

                            symbol.icon = symbol_icons[index];

                            symbol.iconSize = SymbolIconSize.Medium;

                            symbol.PE.Stroke = polyline.PE.Fill;

                            symbol.PE.Fill = polyline.PE.Fill;

                            symbol.point = dataPoint.point;

                            symbols.Add(symbol);

                        }

                    }

Is there any way to retain the same symbols for the same line which breaks in the middle for the NULL values?

Your help is highly appreciated.