Select a NativSelection


i have a table. selecting a row the form show the data. i want a nativselect in that formular which display all possible datas. it has function already. but the problem is that after selecting a row the formular dosnt show the current value in the nativselecetion.

the code relating to that issue is:

			if (newDataSource.getItemProperty("Typ").getValue() != null) { RowId(new Object[] { newDataSource.getItemProperty("Typ").getValue() }));
			} else {;

but i do not know how to get better.

help plz