how to fill comboobx using dataset

hi can any one show some example how to fill combobox using dataset
i used this:

ds_code = general.ExecuteDataset(con, "HRUser_sprollcodeselect")
Dim i As Integer = ds_code.Tables(0).Rows.Count
HRUser_cmb_rollcode.DataSource = ds_code.Tables(0)
HRUser_cmb_rollcode.DisplayMember = "roll_code"

but i couldn't get i am getting system.data.datarowview,can any one help me please

That means that there is no column named "roll_code" in the bound table. Make sure that you are specifying a valid column name, taking note that DisplayMember is case-sensitive.

hi jmcilhinney, thanks a lot, i did a small mistake,i found that using ur help thank you very much