RadGrid - Collapsing or expanding a group removes the entered but non-saved data

[Koen]

Hi, I have a RadGrid with collapsed rows. If I expand group 1 and modify data, and then expand group 2 to enter more data, the data in group1 is gone. Is this a bug or am I doing something wrong?

[Eyup]

Hi Koen,

Generally, the state of the controls in grid templates or edit mode will reset its state on rebinding operations. Therefore, you can try to change the HierarchyLoadMode to Client or ServerBind:
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/hierarchical-grid-types-and-load-modes/hierarchy-load-modes

Regards,
Eyup
Telerik

[Koen]

Hi Eyup, that does not seem to do the trick. The value is still modified.

I have AllowExpandCollapse="True" in the ClientSettings and I have HierarchyLoadMode="Client" in the MasterTableView

[Eyup]

Hi Koen,

Could you please make sure that you are not using DataBind() to bind the grid? Performing complex grid operations such as Inserting, Deleting, Updating, Hierarchy relations, Grouping, Exporting, Paging, Sorting, Filtering, etc. require accommodating appropriate database operations.  Therefore, we suggest you to avoid Simple Databinding and strongly recommend the use of more advanced databinding methods, which automatically handle the aforementioned functions:
Declarative DataSource
Programmatic Data Binding (NeedDataSource and DetailTableDataBind event)

You should set the DataSource property only within these event handlers.

​Also, temporarily disable any AJAX on the page if present (RadAjaxManager, RadAjaxPanel, UpdatePanel, etc.) and enable your script debugger (FireBug or F12) to see whether there are any script or server errors interfering.

Regards,
Eyup
Telerik

[Koen]

Reason was that I was using grouping, and then GroupLoadMode="Client" should be used instead.

[Eyup]

Hi Koen,

Even then, using DataBind() is not recommended. You should one of the approaches referenced in my previous reply.

Regards,
Eyup
Telerik by Progress