webform gridview合并单元格

gridview合并单元格

由于项目要求，需要合并某些单元格，因此特意封装了如下帮助类：

  /// <summary>
     /// 合并单元格
     /// </summary>
     public class MergeCellHelper
     {
         /// <summary>
         /// 合并表头
         /// </summary>
         /// <param name="row">当前行</param>
         /// <param name="startColumn">开始列</param>
         /// <param name="endColumn">结束列</param>
         public static void MergeHeader(GridViewRow row, int startColumn, int endColumn)
         {
             for (int i = startColumn; i <= endColumn; i++)
             {
                 if (i != startColumn)
                 {
                     row.Cells[i].Visible = false;
                     continue;
                 }
                 row.Cells[startColumn].ColumnSpan = endColumn - startColumn + ;
             }
         }

         /// <summary>
         /// 合并指定列的行
         /// </summary>
         /// <param name="gv">gridview</param>
         /// <param name="columns">指定的列：可以多列</param>
         public static void MergeRow(GridView gv, params int[] columns)
         {
             MergeRowByReferenceColumn(gv, , columns);
         }

         /// <summary>
         /// 合并指定列的行(参考列一定要合理，慎用)
         /// </summary>
         /// <param name="gv">gridview</param>
         ///  /// <param name="referenceColumn">参照列</param>
         /// <param name="columns">指定的列：可以多列</param>
         public static void MergeRowByReferenceColumn(GridView gv, int referenceColumn, params int[] columns)
         {
             for (int i = ; i < columns.Length; i++)
             {
                 var currentColumn = columns[i];
                 int rowSpan = ;
                 for (int j = ; j < gv.Rows.Count; j++)
                 {
                     var currentRow = gv.Rows[j];
                     if (j < gv.Rows.Count - )
                     {
                         var nextRow = gv.Rows[j + ];
                         if (currentRow.Cells[referenceColumn].Text == nextRow.Cells[referenceColumn].Text)
                         {
                             if (currentRow.Cells[currentColumn].Text == nextRow.Cells[currentColumn].Text)
                             {
                                 rowSpan = rowSpan <  ?  : rowSpan + ;
                                 nextRow.Cells[currentColumn].Visible = false;
                             }
                             else
                             {
                                 gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
                                 rowSpan = ;
                             }
                         }
                         else
                         {
                             gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
                             rowSpan = ;
                         }
                     }
                     else
                     {
                         gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
                         rowSpan = ;
                     }
                 }
             }
         }

     }