dynamic object / expandoobject bind to itemsource?

[Tony]

I tried to bind  dynamic list like below but failed.

 

ObservableCollection<dynamic>       cases
 mapping.ItemsSource = cases     ;

mapping.ItemMappings.Add(new ItemMapping(this.YValue, DataPointMember.YValue));

It seems something wrong with the seriesmapping?
Is it possible to bind a dynamic object list to a line chart or bar chart?

P.S
I use linq to query the dynamic objects

IEnumerable<dynamic> callStats = (from c in ipCases
                            group c by c.Year into d
                            select new
                            {
                                Year = Convert.ToInt32(d.Key.ToString()),
                                CaseCounts = d.Sum(x => x.CaseCount)
                            } as dynamic);

Thanks!

[Rosko]

Hi Tony,

We investigated closely the scenario. The problem is caused by the security model of the Silverlight platform. RadChart is not expected to work under these cirumstances. The UI control does not have access to the object, because of the Silverlight security restrictions. You can read about the topic over here. There is a possible workaround for this. You can create another class to which you will bind to the RadChart. You just need to cast the result of the LINQ query to that object. You can see the code snippet for further help.

public class HelperType
        {
            public int Year { get; set; }
            public int CaseCounts { get; set; }
        }

IEnumerable<dynamic> callStats = (from c in ipCases
                                              group c by c.Year into d
                                              select new HelperType
                                              {
                                                  Year = Convert.ToInt32(d.Key.ToString()),
                                                  CaseCounts = d.Sum(x => x.CaseCount)
                                              });

Greetings,

Rosko

the Telerik team