效果如下(合并同一列中相等且连续的N个单元格，但如果前一列没有合并的话，则后一列也不合并)：
代码如下：
1
合并多列#region 合并多列
2
/**//// <summary>
3
/// GridView合并
4 /// </summary>
5 /// <param name="gdv">GridView</param>
6 /// <param name="startColumnIndex">起始列Index</param>
7
/// <param name="endColumnIndex">结束列Index</param>
8 public static void MergeGridViewRows(GridView gdv, int startColumnIndex, int endColumnIndex)
9 
{
10 if (gdv == null || endColumnIndex < startColumnIndex || gdv.Rows.Count < 2)
11 return;
12 if (startColumnIndex < 0 || endColumnIndex > gdv.Columns.Count - 1)
13 throw new ArgumentOutOfRangeException("列Index超出GridView可用列的范围。");
14 EndColumnIndex = endColumnIndex;
15 MergeCellWithSubColumn(gdv, 0, 0, gdv.Rows.Count - 1);
16 }
17 private static int EndColumnIndex = 0;
18
19 /**//// <summary>
20 /// 合并当前列和后续列
21 /// </summary>
22 /// <param name="currentColumnIndex">当前列</param>
23 /// <param name="startRowIndex">起始行</param>
24 /// <param name="endRowIndex">结束行</param>
25 /// <summary>
26 private static void MergeCellWithSubColumn(GridView gdv, int currentColumnIndex, int startRowIndex, int endRowIndex)
27 {
28 if (currentColumnIndex > EndColumnIndex)//结束递归
29 return;
30 string preValue = GetCellValue(gdv,startRowIndex, currentColumnIndex);
31 string curValue = string.Empty;
32 int endIndex = startRowIndex;
33 for (int i = startRowIndex + 1; i <= endRowIndex + 1; i++)
34 {
35 if (i == endRowIndex + 1)
36 curValue = null;//完成最后一次合并
37 else
38 curValue = GetCellValue(gdv, i, currentColumnIndex);
39 if (curValue != preValue)
40 {
41 //合并当前列
42 MergeColumnCell(gdv, currentColumnIndex, endIndex, i - 1);
43 //合并后续列
44 MergeCellWithSubColumn(gdv, currentColumnIndex + 1, endIndex, i - 1);
45 endIndex = i;
46 preValue = curValue;
47 }
48 }
49 }
50
51 /**//// <summary>
52 /// 取得GridView中单个Cell的值
53 /// </summary>
54 /// <param name="gdv">GridView</param>
55 /// <param name="rowIndex">行Index</param>
56 /// <param name="columnIndex">列Index</param>
57 /// <returns></returns>
58 private static string GetCellValue(GridView gdv, int rowIndex, int columnIndex)
59 {
60 return gdv.Rows[rowIndex].Cells[columnIndex].Text;
61 }
62
63 /**//// <summary>
64 /// 合并同列中连续的N个单元格
65 /// 注意：这里只是隐藏后续的单元格，而没有删除单元格
66 /// 主要考虑到删除后会如下两种情况：
67 /// 1. PostBack后找不回来；
68 /// 2.通过rowIndex和columnIndex来定位单元格的过程会更复杂
69 /// </summary>
70 /// <param name="gdv">GridView</param>
71 /// <param name="columnIndex">列Index</param>
72 /// <param name="startRowIndex">起始行Index</param>
73 /// <param name="endRowIndex">结束行Index</param>
74 private static void MergeColumnCell(GridView gdv, int columnIndex, int startRowIndex, int endRowIndex)
75 {
76 gdv.Rows[startRowIndex].Cells[columnIndex].RowSpan = endRowIndex - startRowIndex + 1;
77 for (int i = startRowIndex + 1; i <= endRowIndex; i++)
78 gdv.Rows[i].Cells[columnIndex].Visible = false;
79
}
使用：
GridView的PreRender事件中调用：MergeGridViewRows(gridView,0,5)
也可以将上面的代码改成JS版本，在客户端执行。
posted on 2007-12-26 19:58
Silent Void 阅读(1048)
评论(5) 编辑 收藏 网摘 所属分类:
Asp.Net