[Solved] Grouping by field from base class

[Stefan Karlik]

Hi,

we have the following structure of class definition for the datasource:

  public interface IActivityInstanceBase : IDataLayerBase
    {
        string Id { get; set; }
        DateTime ExecutionDate { get; set; }
        DateTime PlannedDate { get; set; }
.....
        string ActivityInstanceName { get; set; }
        string ParentId { get; set; } 
    }

    public interface IActivityInstance : IActivityInstanceBase, IExportable, IFileAddable
    {
        IMaintenanceGroup MaintenanceGroup { get; set; }
        IActivity Activity { get; set; }
        IActivityStatus Status { get; set; }
.....
        string MaintenanceGroupName { get; set; }
        string ParentGroupName { get; set; }
    }

Datasource is of type IActivityInstance which inherits IActivityInstanceBase (connected over needdatasource event)

I have to group by a field from the base class (ParentId) which is not possible (Exception field not found in datasource).

In the definition of grid columns i can also use fields from the base class, only in the group by expression it isn´t possible.

Any ideas how to solve that?

regards,
Stefan

[Veli]

Hi Stefan,

Testing the scenario you have specified, I cannot reproduce what you are getting. Particularly and exception is thrown for the opposite scenario, e.g. when you are trying to group by child properties and you have objects  of the base type in your collection. I cannot reproduce your scenario when you have base properties throwing the exception. Attaching a sample project you can test locally. Let me know if you are able to reproduce what you are getting in it.

Best wishes,
Veli
the Telerik team

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