The following solution works for me if it helps anyone.

For your reference, my class has defined the following data:
NBarSeries barSeries;
NDataPoint datapoint;

// Scroll implementation contained within the managed code.

bool AddBarDataInternal(double[] safearray, int idx)
{
if (safearray[idx] > 10.0) // setup to scroll
{
// preserve the data point at index zero
NDataPoint zeropoint = barSeries.ComposeDataPoint(0);
int count = barSeries.GetDataPointCount() - 1;
int indx;

for (indx = 0; indx < count; indx++)
{
datapoint = barSeries.ComposeDataPoint(indx + 1);
datapoint[DataPointValue.X] = (double)(indx + 1);
barSeries.StoreDataPoint(indx, datapoint);
} // end for
// Store the index zero data point here
zeropoint[DataPointValue.X] = (double) count + 1;
zeropoint[DataPointValue.Y] = safearray[idx + 1];
barSeries.StoreDataPoint(count, zeropoint);
}
else
barSeries.AddDataPoint(new NDataPoint(safearray[idx], safearray[idx + 1])); // 1..10
nChartControl1.Refresh();

return (true);
}

Hello,

I have a relatively simple 3D bar chart which can display 10 bars along the X-axis (i.e. position 1 - 10). If I need to add more than 10 bars, I'd like to shift the existing bars (e.g. bars 2 - 10) one position to the left along the X-axis (dropping out the bar data at position 1) and add the latest bar to the 10th position. My current C# implementation calls ClearDataPoints(), and redraws each bar at its' new X-axis location. This method of scrolling makes for a jerky (and slow) way to update the chart given that I'm doing this from unmanaged code. I don't want (and don't need) to add a horizontal scroll bar. Is there a better way to get the result I seek, or is it as simple as keeping the data history in the managed code?

Thanks,

Steve Clevenger