TIWCGJQGridColSearchOptions.OnBuildSelect Property
This option have sense only if the dataUrl parameter is set. In case where the server response can not build the select element you can use your on 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 01 read GetFuncValue write SetFuncValue stored IsFuncStored;