internal static void UserValueToInternalValues(Axis xAxis, Axis yAxis, Object userXValue, Double userYValue, out Double internalXValue, out Double internalYValue) { internalYValue = userYValue; internalXValue = Double.NaN; if (xAxis != null) { if (userXValue != null) { if (xAxis.IsDateTimeAxis) { try { DateTime dateTime = Convert.ToDateTime(userXValue); internalXValue = DateTimeHelper.DateDiff(dateTime, xAxis.FirstLabelDate, xAxis.MinDateRange, xAxis.MaxDateRange, xAxis.InternalIntervalType, xAxis.XValueType); } catch { throw new ArgumentException("Incorrect DateTime value of XValue."); } } else { internalXValue = Convert.ToDouble(userXValue); } } } if (yAxis != null && yAxis.Logarithmic) { internalYValue = DataPoint.ConvertYValue2LogarithmicValue(xAxis.Chart as Chart, userYValue, yAxis.AxisType); } else { internalYValue = userYValue; } }