I just want to ask on how can I call item command "Filter" on Normal mode and item command "PerformInsert" on Edit mode when Enter key is pressed? Also my page uses MasterPage which also adds problem to my task. Any feedback would be greatly appreciated.
I guess you want to filter and perform insert on Enter key press. For filtering you can set AutoPostBackOnFilter to true for the columns and to have the form submitted set KeyboardNavigationSettings->AllowSubmitOnEnter=true. Please take a look at the sample code: