Question

I’m starting to experiment with the new chart controls in System.Windows.Controls.DataVisualization.Charting (from the Silverlight 3 Toolkit)

I want to bind a data table that contains a list of budgets (name & value column). It works when I first load my page:

<v:Chart x:Name='BudgetChart'           Title='Budget Distribution'>     <v:PieSeries x:Name='PieSeries'                   IndependentValueBinding='{Binding Path=CategoryName}'                  DependentValueBinding='{Binding Path=Value}'/> </v:Chart> 

I bind my data to the chart like this:

void RefreshChart() {      PieSeries.ItemsSource = dataTable; } 

My problem, is that if I call RefreshChart() a second time, I get a bizarre exception:

KeyNotFoundException: The given key was not present in the dictionary.

Is there something I’m not doing right?

Answer 1

This was actually a bug with the charting controls that only manifested itself on the WPF side (works fine in Silverlight). The issue has been fixed quickly after I reported it as reported on Delay’s Blog!