Winfrom 表格单元格格式化事件（DataGridView - CellFormatting）

格式化 14，15列将编码显示为编码值

 this.dgv_prescription.CellFormatting +=
     (object sen, DataGridViewCellFormattingEventArgs ev) =>
     {
         DataGridView dgv = (DataGridView)sen;
         if (ev.RowIndex < dgv.Rows.Count - )
         {
             if (ev.ColumnIndex ==  || ev.ColumnIndex == )
             {
                 ev.Value = ev.Value.ToString() == "" ? "是" : "否";
             }
         }
     };