就控件而言，可以这样合并单元格
//从grd的第rowIndex行colIndex列单元格以下count行合并
public static void 合并行(GridView grd, int rowIndex, int colIndex, int count)
{
grd.Rows[rowIndex].Cells[colIndex].RowSpan = count;
for (var i = rowIndex + 1; i < rowIndex + count; i++)
grd.Rows[i].Cells[colIndex].Visible = false;
}
//从grd的第rowIndex行colIndex列单元格向右count列合并
public static void 合并列(GridView grd, int rowIndex, int colIndex, int count)
{
grd.Rows[rowIndex].Cells[colIndex].ColumnSpan = count;
for (var i = 1; i < count; i++)
grd.Rows[rowIndex].Cells[colIndex + i].Visible = false;
}
然后剩下就是你去从任意一行向下搜索你的数据，得出有多少行需要合并这个count数值来。
