XtraGrid判断列有没有显示

判断列有没有显示，
            int k = 0;
            #region 得到已显示标题            
            for (int i = 0; i < gv.Columns.Count; i++)
            {
                if (gv.Columns[i].Visible == true)
                {
                    for (int j = 0; j < gv.Columns.Count; j++)
                    {
                        if (gv.Columns[j].VisibleIndex == k)
                        {
                            ICell cell = row.CreateCell(k);
                            cell.SetCellValue(gv.Columns[j].Caption.ToString());
                            if (gv.Columns[j].UnboundType.ToString() == "Decimal")
                            { UnboundType[gv.Columns[j].FieldName] = "Decimal"; }//数字
                            else
                            { UnboundType[gv.Columns[j].FieldName] = ""; }//字符
                            k++;
                        }
                    }
                }
            }
            #endregion