Hi........
I'm new to Qt. in my application, i have a file which consist of columns with values and i want to show first column values into combobox list and also take duplicates out. and in second column of values i want to show minimum and maximum value in that column in a label. how to do it? my columns look like this:

Station Ammonia
1 6
1 4
1 7
1 23
2 5
2
2
2
2
3
3
3
3
4
4
4