TIWCGJQGridColEditOptions.OnBuildSelect Property
This option is relevant only if the dataUrl parameter is set. When the server response can not build the select element, you can use your own function to build the select. The function should return a string containing the select and options value(s) as described in dataUrl option. Parameter passed to this function is the server response
published property OnBuildSelect: TIWCGJSonFunc index 02 read GetFuncValue write SetFuncValue stored IsFuncStored;