I have a (horizontal) float bar chart, and i have some values that i'd like to display in labels on top of the bars.

Because my data is grouped, each row is actually made up of quite a few datapoints (otherwise i'd just use the data label).

Is there a way to display one label for each row, on the exact location of each row??

I have tried writing some code that figures out how many categories i have, and tried to position labels by calculating where they should go for each category - as a percentage of the total height, but this doesnt seem to be working out.

Hi Clare,

Can you post the code for review?

Here is my code, ignore the label values i'm hard coding them for now

for (int i = 0; i < bar.BeginValues.Count; i++)

{

float val = (100 / bar.BeginValues.Count) * i;

NLabel title = new NLabel("7:00:00");

title.TextStyle.FontStyle = new NFontStyle("Arial", 10, FontStyle.Italic);

title.Location = new NPointL(new NLength(3, NRelativeUnit.ParentPercentage), new NLength(val, NRelativeUnit.ParentPercentage));

title.TextStyle.BorderStyle.Width = new NLength(0);

title.Margins = new NMarginsL(0, 0, 0, 0);

title.ContentAlignment = ContentAlignment.MiddleCenter;

chart.ChildPanels.Add(title);

NLabel othertitle = new NLabel("8:12:00");

othertitle.TextStyle.FontStyle = new NFontStyle("Arial", 10, FontStyle.Italic);

othertitle.Location = new NPointL(new NLength(50, NRelativeUnit.ParentPercentage), new NLength(val, NRelativeUnit.ParentPercentage));

othertitle.Margins = new NMarginsL(0, 0, 0, 0);

othertitle.TextStyle.BorderStyle.Width = new NLength(0);

othertitle.ContentAlignment = ContentAlignment.MiddleCenter;

chart.ChildPanels.Add(othertitle);

}

}

What i was hoping to achieve was for a label to appear over each bar but it ends up looking like the attached image

Attachments

LabelPositioning.jpg (166 views, 74.00 KB)

Hi Clare,

You should populate either the axis labels or the data labels series for each bar - for example:

// 1. Modify category labels of primary x axis

NOrdinalScaleConfigurator ordinalScale = chart.Axis(StandardAxis.PrimaryX).ScaleConfigurator as NOrdinalScaleConfigurator;

if (ordinalScale != null)

{

ordinalScale.AutoLabels = false;

// for each category add a label here

ordinalScale.Labels.Clear();

ordinalScale.Labels.Add("Category 1");

ordinalScale.Labels.Add("Category 2");

ordinalScale.Labels.Add("Category 3");

}

// 2. Modify data labels per data point

NBarSeries barSeries = new NBarSeries();

barSeries.Labels.Clear();

barSeries.Labels[0] = "Some Label For Bar 1";

barSeries.Labels[1] = "Some Label For Bar 2";

// etc.

Hope this helps - let us know if you meet any problems.