GridView合并单元格的简单方法

string _tempvalue="";
 2     int _temprowspan = 1;
 3     TableCell _temptablecell=null;
 4 
 5     protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
 6     {
 7 
 8         if (e.Row.RowType == DataControlRowType.DataRow || e.Row.RowType == DataControlRowType.Footer)
 9         {
10             if (e.Row.Cells[0].Text == _tempvalue)
11             {
12                 _temprowspan++;
13                 e.Row.Cells.Remove(e.Row.Cells[0]);
14             }
15             else
16             {
17                 if (_temprowspan != 1)
18                     _temptablecell.RowSpan = _temprowspan;
19 
20                 _tempvalue = e.Row.Cells[0].Text;
21                 _temptablecell = e.Row.Cells[0];
22                 _temprowspan = 1;
23             }
24         }
25     }

//   <summary>   
    ///   合并GridView列中相同的行   
    ///   </summary>   
    ///   <param   name="GridView1">GridView对象</param>   
    ///   <param   name="cellNum">需要合并的列</param>   
    public static void GroupRows(GridView GridView1, int cellNum)
    {
        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 (gvr.Cells[cellNum].Text == gvrNext.Cells[cellNum].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;
                }
            }
        }
    } 

    ///   <summary>   
    ///   根据条件列合并GridView列中相同的行   
    ///   </summary>   
    ///   <param   name="GridView1">GridView对象</param>   
    ///   <param   name="cellNum">需要合并的列</param>
    ///   ///   <param   name="cellNum2">条件列(根据某条件列还合并)</param>
    public static void GroupRows(GridView GridView1, int cellNum, int cellNum2)
    {
        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 (gvr.Cells[cellNum].Text + gvr.Cells[cellNum2].Text == gvrNext.Cells[cellNum].Text + gvrNext.Cells[cellNum2].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;
                }
            }
        }
    } 

  

第二个方法只是在第一个方法的修改了一点点, 在判断单元格的时候，加上了一个条件列：

if (gvr.Cells[cellNum].Text + gvr.Cells[cellNum2].Text == gvrNext.Cells[cellNum].Text + gvrNext.Cells[cellNum2].Text)。当然，第二个方法还可以扩展，根据多个列的条件来合并。