You have missed the last parameter
@UID
and Change
upusrinfoDLcmd.Parameters.Add("@6", SqlDbType.NVarChar, 50).Value = countrdrdolst.SelectedItem;
upusrinfoDLcmd.Parameters.Add("@7", SqlDbType.VarChar, 25).Value = statedrdolst.SelectedItem;
upusrinfoDLcmd.Parameters.Add("@8", SqlDbType.VarChar, 25).Value = citiesdrdolst.SelectedItem;
to
upusrinfoDLcmd.Parameters.Add("@6", SqlDbType.NVarChar, 50).Value = countrdrdolst.SelectedItem.Text;
upusrinfoDLcmd.Parameters.Add("@7", SqlDbType.VarChar, 25).Value = statedrdolst.SelectedItem.Text;
upusrinfoDLcmd.Parameters.Add("@8", SqlDbType.VarChar, 25).Value = citiesdrdolst.SelectedItem.Text;