Hi Sébastien,
Regarding your questions:
1. Is it possible to round the value of a data label without rounding the data point?
Yes, this is possible. Each data series has an associated NValueFormatter object which can be accessed through the ValueFormatter property. For example you can use something like:
series.Values.ValueFormatter = new NNumericValueFormatter("0.000");
or
series.Values.ValueFormatter = new NNumericValueFormatter("0.##");
The formats strings are completely described in the .NET Framework documentation:
http://msdn.microsoft.com/en-us/library/26etazsy.aspx2. Is this possible to include the X values in the data labels?
Yes, you have to include the <xvalue> tag in the data label format string, for example:
series.DataLabelStyle.Format = "Y:<value> X:<xvalue>";
Best Regards,
Nevron Support Team