Hi,
I am trying to show/hide the Data Labels on a Column Bar chart through the code window but cannot get the C# syntax right. Can you help??
I want to hide the data label when the value of the bar = 0 and show it otherwise.

Can you please show some example code to do this.

I am getting the following errors when compiling

(66,23) : error CS0030: Cannot convert type 'Nevron.Chart.NDataSeriesDouble' to 'double'
(68,9) : error CS0029: Cannot implicitly convert type 'double' to 'bool'

from the below code snippet.

NDataSeriesDouble values = bar.Values;
double BarValue = (double)bar.Values;

if (BarValue = 0.0)
{
bar.DataLabelStyle.Format = "";
}
else
{
bar.DataLabelStyle.Format = "<value>";
}

Thanks
Brian

Hi Brian,

The first error means that bar.Values is a list of numbers and you cannot assign it to one variable of type double. You can use indexing to access a particular value in the list.

As for the second error, the comparison should be:

if (BarValue == 0.0)
{
}

These are only syntax errors, but in fact the correct approach is to leave the data label format to <value> and change the formatting of the value itself.

The following code demonstrates how to accomplish your requirement:

NChart chart = nChartControl1.Charts[0];
NBarSeries bar = new NBarSeries();
chart.Series.Add(bar);
bar.Values.AddRange(new double[] { 10, 20, 15, 33, 18, 0, 27, 2 });

bar.DataLabelStyle.Format = "<value>";
bar.Values.ValueFormatter = new Nevron.Dom.NNumericValueFormatter("#.###");

This is a full chart setup, in fact you only need the last two lines.

Best Regards,
Nevron Support Team