Problem binding object to RadChart

[matt]

I looked up your example below and i am having problem reproducing it exactly like you.
I am not sure what my problem is because it looks pretty similar to your example to me.

http://www.telerik.com/help/aspnet/chart/grouping-databound-items.html

I have a list of custom objects with 3 properties (Service, Name, Quantity)
The list i get is as follow

    Name: "décembre"
    Quantite: 3
    Service: "C.I. Centre administratif "

    Name: "décembre"
    Quantite: 1
    Service: "C.I. Centre-ville"

    Name: "novembre"
    Quantite: 1
    Service: "C.I. Temporaire"

Public Sub RefreshData()
    Dim i As List(Of Intervention) = AccesDonneesHelper.GetInterventionsDetails()
    RadChart1.ChartTitle.TextBlock.Text = "MY GRAPH"
    RadChart1.Series.Add(New ChartSeries())
    RadChart1.DataSource = AddFilter()
    RadChart1.DataGroupColumn = "Service"
    RadChart1.PlotArea.XAxis.DataLabelsColumn = "Name"
    RadChart1.DataBind()
End Sub
and the output (see attached) is not what expected. 
There should be at least one bar in november.
What am i doing wrong?

[matt]

I understand my problem. It is because a value is needed for each grouping otherwise it will put the first value it in the first index of the chart.
I am not sure I like this behavior but I reckon you should at least add a comment in your example that explains this behavior.

[Ves]

Hello Matt,

Thanks for the note. That's correct -- the chart puts the first item in each series at the first available position, unless XValue is specified. I have attached a small example, showing how you can achieve your goal.

Best regards,
Ves
the Telerik team