webform gridview合并单元格

gridview合并单元格

因为项目要求，须要合并某些单元格，所以特地封装了以下帮助类：

 1  /// <summary>
 2     /// 合并单元格
 3     /// </summary>
 4     public class MergeCellHelper
 5     {
 6         /// <summary>
 7         /// 合并表头
 8         /// </summary>
 9         /// <param name="row">当前行</param>
10         /// <param name="startColumn">开始列</param>
11         /// <param name="endColumn">结束列</param>
12         public static void MergeHeader(GridViewRow row, int startColumn, int endColumn)
13         {
14             for (int i = startColumn; i <= endColumn; i++)
15             {
16                 if (i != startColumn)
17                 {
18                     row.Cells[i].Visible = false;
19                     continue;
20                 }
21                 row.Cells[startColumn].ColumnSpan = endColumn - startColumn + 1;
22             }
23         }
24 
25         /// <summary>
26         /// 合并指定列的行
27         /// </summary>
28         /// <param name="gv">gridview</param>
29         /// <param name="columns">指定的列：能够多列</param>
30         public static void MergeRow(GridView gv, params int[] columns)
31         {
32             MergeRowByReferenceColumn(gv, 0, columns);
33         }
34 
35         /// <summary>
36         /// 合并指定列的行(参考列必定要合理，慎用)
37         /// </summary>
38         /// <param name="gv">gridview</param>
39         ///  /// <param name="referenceColumn">参照列</param>
40         /// <param name="columns">指定的列：能够多列</param>
41         public static void MergeRowByReferenceColumn(GridView gv, int referenceColumn, params int[] columns)
42         {
43             for (int i = 0; i < columns.Length; i++)
44             {
45                 var currentColumn = columns[i];
46                 int rowSpan = 1;
47                 for (int j = 0; j < gv.Rows.Count; j++)
48                 {
49                     var currentRow = gv.Rows[j];
50                     if (j < gv.Rows.Count - 1)
51                     {
52                         var nextRow = gv.Rows[j + 1];
53                         if (currentRow.Cells[referenceColumn].Text == nextRow.Cells[referenceColumn].Text)
54                         {
55                             if (currentRow.Cells[currentColumn].Text == nextRow.Cells[currentColumn].Text)
56                             {
57                                 rowSpan = rowSpan < 2 ? 2 : rowSpan + 1;
58                                 nextRow.Cells[currentColumn].Visible = false;
59                             }
60                             else
61                             {
62                                 gv.Rows[j - rowSpan + 1].Cells[currentColumn].RowSpan = rowSpan;
63                                 rowSpan = 1;
64                             }
65                         }
66                         else
67                         {
68                             gv.Rows[j - rowSpan + 1].Cells[currentColumn].RowSpan = rowSpan;
69                             rowSpan = 1;
70                         }
71                     }
72                     else
73                     {
74                         gv.Rows[j - rowSpan + 1].Cells[currentColumn].RowSpan = rowSpan;
75                         rowSpan = 1;
76                     }
77                 }
78             }
79         }
80 
81 
82     }

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