Hi Ahmed,

I’ve look for the sample that you show above and I figured the problem is on PrepareDataBinding event. This problem occurs because ValueList is not setted when PrepareDataBinding event. To resolve this issue, you can remove the validation (if (!IsPostBack)) from PrepareDataBinding event.

I put the revision of the sample here. Hope it helps.

Regards,

Bernard

Thank you for your reply Bernard.  I actually don't use the PrepareDataBinding event.  And I never check for IsPostBack or IsFlyPostBack.

I have a DataSource that I bind the grid to.  In the InitializeLayout event, I call a function to clear any values in the WebValueLists.  Then I call another function to load, create, and add the columns to the Grid.  Seperately, I call another function that fills the WebValueList with a DataSource.

Hi Ahmed,

I’ve look on your code. I think the problem is WebValueList setted in wrong event. On InitializeLayout event, I suggest you to not to place dynamic object or data related settings especially for object that created during the runtime. You can clear and load the WebValueList on PrepareDataBinding event. I attach my sample here. Hope it helps.

Regards,

Bernard

Thank you Bernard. 

I ended up clearing and loading the dropdowns in the PrepareDataBinding event and it has been consistant.  I am still using InitializeLayout event though to create and add the columns to the grid.

Regards

Hi Ahmed,

Is it working fine now? If you have any other question please don’t hesitate to ask us.

Regards,

Bernard

Yes, it is working fine now.  Thank you & regards.