今天修改旧的项目，发现之前用到的gridview合并单元格代码不适用于模板列。做了修改之后记录下来。
两种方法，第一种适用于所有情况，第二种适用于合并依据列非模板列。
两种方法如下：
方法一：

/// <summary> /// 合并GridView中某列相同信息的行（单元格） 包含模板列 根据ID=rowspanid 的hiddenfield控件的值来合并。需要合并的 单元格需加上这个控件。根据控件值合并。可以将控件放在某一列，也可以放在每一列。取值的时候分开就行。此方法适合任意列，特别是模板列 无法取cell.text的时候 /// </summary> /// <param name="GridView1">GridView</param> /// <param name="cellNums">合并第几列</param> /// <param name="rowspanid">合并依据控件ID，这里用的hiddenfield控件。只需将ID=rowspanid的hiddenfield控件放在单元格里即可</param> public static void GroupRows(GridView GridView1, int[] cellNums, string rowspanid = "hfrowspan") { foreach (int cellNum in cellNums) { int i = 0, rowSpanNum = 1; while (i < GridView1.Rows.Count - 1) { GridViewRow gvr = GridView1.Rows[i]; for (++i; i < GridView1.Rows.Count; i++) { GridViewRow gvrNext = GridView1.Rows[i]; if (((HiddenField)gvr.Cells[cellNum].FindControl(rowspanid)).Value == ((HiddenField)gvrNext.Cells[cellNum].FindControl(rowspanid)).Value) { gvrNext.Cells[cellNum].Visible = false; rowSpanNum++; } else { gvr.Cells[cellNum].RowSpan = rowSpanNum; rowSpanNum = 1; break; } if (i == GridView1.Rows.Count - 1) { gvr.Cells[cellNum].RowSpan = rowSpanNum; } } } } }

方法二：

/// <summary> /// 根据某一列合并其他列。依据的列不能是模板列，否则请用上一个方法↑。 /// </summary> /// <param name="GridView1">GridView</param> /// <param name="cellNums">合并第几列，数组</param> /// <param name="byCellNum">依据第几列</param> public static void GroupRowsByOne(GridView GridView1, int[] cellNums, int byCellNum) { foreach (int cellNum in cellNums) { int i = 0, rowSpanNum = 1; while (i < GridView1.Rows.Count - 1) { GridViewRow gvr = GridView1.Rows[i]; for (++i; i < GridView1.Rows.Count; i++) { GridViewRow gvrNext = GridView1.Rows[i]; //if (((HiddenField)gvr.Cells[cellNum].FindControl(rowspanid)).Value == ((HiddenField)gvrNext.Cells[cellNum].FindControl(rowspanid)).Value) if(gvr.Cells[byCellNum].Text== gvrNext.Cells[byCellNum].Text) { gvrNext.Cells[cellNum].Visible = false; rowSpanNum++; } else { gvr.Cells[cellNum].RowSpan = rowSpanNum; rowSpanNum = 1; break; } if (i == GridView1.Rows.Count - 1) { gvr.Cells[cellNum].RowSpan = rowSpanNum; } } } } }