[Solved] Is there any event to capture expanding some group?

[Weiqi]

Hi,

i want to do something before expand group


Thanks.

[Maya]

Hello Weiqi,

Unfortunately, for the time being RadGridView does not support events that listens for expanding/collapsing of a group. However, if you share more details about your scenario and the purpose of using an event occurring before expanding a group, we may be able to provide you with a possible workaround. 

Regards,
Maya
the Telerik team

[Weiqi]

Hello Maya,

my scenario is our data grid don't load all the data from web service. we have expanded RadGridView to implement paging and sorting function. In fact, only one page size rows is kept in the RadGridView.ItemSource.

For GroupBy function, we also want to implement like paging and sorting.  At first loaded, the  RadGridView  only have one page size
rows and displayed in the screen.  when user drags a column to the groupby area, first we will get all the distinct values of this column from web service. we hope we could generate all the groups according to the distinct values same as RadGridView  group by local data. if we expand one group, we will get row data from web service by group information and insert the returned data to this group.

could you provide me with a possible workaround?  Thanks very much

Thanks,
Weiqi

[Weiqi]

any feedback?

[Maya]

Hello Weiqi,

Following up your requirements, I get the impression that you are trying to achieve load-on-demand functionality when expanding the groups in RadGridView. If that is the case, it would be quite undesirable scenario to achieve as in this case you would not be able to implement aggregates, to get the number of row, etc. Thus I would not recommend its accomplishment. However, if this is not exactly your demand, please give us a bit more information with the exact requirements or if it is possible, provide us with a sample project so that we are aware of your accurate expectations and purposes. 

 
Regards,
Maya
the Telerik team