Select All pattern for groups in RadGridView

[Sam]

Hi, 

We really need some guidance on this functional scenario:

- We have a grid where each row has a checkbox column
- Each group also has a checkbox 
- The group checkbox should be checked if all the checkboxes for rows in the group are checked, otherwise it should be unchecked
- Checking or unchecking the group checkbox sets all the rows to that value as well
- Every time a row checkbox is checked, each parent group should also re-evaluate whether it needs to be checked or unchecked as well

I've added a GroupDescriptor to create the group, and have specified the GroupHeaderTemplate to show a checkbox next to the group label, which is all good.

However I'm really unsure how to implement the actual behaviour here (preferably using MVVM approach).

A working sample would be greatly appreciated!

Thanks,

Sam

[Ivan Ivanov]

Hello Sam,

I have prepared a sample project that illustrates such a scenario. Unfortunately, since there is a lot of interaction with visual elements at runtime, performance might prove to be an issue. The RadGridView in the attached project is grouped in three levels, but if you do not require nested grouping support, things would be much faster. Please, inform us whether this solution meets your requirements.

Regards,
Ivan Ivanov
the Telerik team

[Sam]

Thanks Ivan, this solution has given us enough guidance to do what we need.

I noticed the performance problems in the sample, but we have managed to avoid those problems by constraining to a single group description.

Thanks for your help,

Sam