Summaries on Grouping

Question

I'm trying to do a summary, everything seems to be OK, but it shows an error message ColumnName cannot be NULL.

I see in other post that "this exception will be occurred only on the mapping name is not exist while grouping the column with the CaptionSummary row.", but the column is there.

the post is here: Link to the post

What am I doing wrong?

.............................................

ObservableCollection::

Each ExpandoObject has the columns listed on the creation.

Attachment: file_c4a6ce6f.zip

Mohanram Anbukkarasu · Answer

Hi Jehosua A, 

Thanks for contacting Syncfusion products.  

We regret for the inconvenience. The provided code snippets are not sufficient to find the exact cause for the reported issue. Kindly share the stack trace details of the exception that occurs in our end. It will be more helpful for us to find the exact cause of the problem and to provide a prompt solution at earlier.  

Regards, 
Mohanram A.