asp.net中GridView中动态多层表头的处理

只需在GridView的RowCreated事件中加入以下代码，且数据源列头使用|划分表头层次关系，如[收入|A项],[收入|B项]，则会自动创建两层，且自动合并[收入]的单元格。

 int layerCount = 0;//层数
            TableCell[] oldCells;

            if (e.Row.RowType == DataControlRowType.Header)
            {
                oldCells = new TableCell[e.Row.Cells.Count];
                e.Row.Cells.CopyTo(oldCells, 0);

                //获取最大层数
                for (int i = 0; i < e.Row.Cells.Count; i++)
                {
                    int t = oldCells[i].Text.Split('|').Length;
                    if (t > layerCount)
                    {
                        layerCount = t;
                    }

                }


                e.Row.Cells.Clear();

                TableHeaderCell tc = null;

                int flag = 0;
                //处理行
                for (int i = 1; i <= layerCount; i++)
                {

                    for (int j = 1; j <= oldCells.Length; j++)
                    {
                        string[] arr = oldCells[j - 1].Text.Split('|');
                        if (arr.Length == i)
                        {
                            tc = new TableHeaderCell();
                            if (layerCount - i > 0)
                            {
                                tc.RowSpan = layerCount - i + 1;//定义表头的所占的行数  
                            }

                            tc.Text = arr[i - 1];
                            tc.CssClass = _gv.HeaderStyle.CssClass;
                            e.Row.Cells.Add(tc);
                        }
                        else if (arr.Length > i)
                        {
                            flag++;
                            if (j >= oldCells.Length || oldCells[j].Text.Split('|').Length < i || arr[i - 1] != 

oldCells[j].Text.Split('|')[i - 1])
                            {
                                tc = new TableHeaderCell();
                                tc.ColumnSpan = flag;
                                tc.Text = arr[i - 1];
                                tc.CssClass = _gv.HeaderStyle.CssClass;
                                e.Row.Cells.Add(tc);
                                flag = 0;
                            }
                        }
                    }

                    if (i < layerCount)
                    {
                        if (tc != null)
                        {
                            tc.Text += "</tr><tr>";
                        }
                    }
                }


            }

实现上图所示的效果则数据源表头格式为：

报修区域,技术难度,当日|维修总费用|合计,当日|维修总费用|材料,当日|维修总费用|管理,当日|修次当日|耗时,当日|状态|合计,当日|状态|已完,当日|状态|未完,本月平均|维修总费用|合计,本月平均|维修总费用|材料,本月平均|维修总费用|管理,本月平均|修次,本月平均|耗时,本月平均|状态|合计,本月平均|状态|已完,本月平均|状态|未完