GroupByExpressions is empty at the first time

[Doraemon]

Hi all,

I use a header context menu to group or ungroup my records in a grid
http://www.telerik.com/help/aspnet-ajax/grid-header-context-menu.html

and I use GroupByExpressions to order by my records.

When I click GroupBy menu at the first time, in event MyRadGrid_NeedDataSource, I get GroupByExpressions by doing the following codes:
MyRadGrid.MasterTableView.GroupByExpressions. But at this time, GroupByExpresssions is empty. I expected that this time there is a record
of GroupByExpresssions.

When I click GroupBy menu again, At this time, GroupByExpressions has one record.???

So my questions are
- Can I get GroupByExpressions when I click on GroupBy menu at the first time ? and How ?
- If Not, Is there any way to workaround this issue ?

Thanks.

[APESTANA]

Hi,
I also have  this problem.
Looking for a solution...
Thanks.

[Eyup]

Hi,

Generally, it is not a good practice to implement any logic in the NeedDataSource event except datasource acquiring. You can use the following event to handle the grouping operation of the grid:

protected void RadGrid1_GroupsChanging(object sender, GridGroupsChangingEventArgs e)
{
    string expression = e.Expression.Expression;
}

Hope this helps. Please give it a try and let me know if it works for you.

Regards,
Eyup
Telerik