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