GridView合并单元格

 

  public static void CellTogether(int cellIndex, ref GridView gvTemp)
        ...{
            int i = 0;
            int rowSpanNum = 1;

            while (i < gvTemp.Rows.Count - 1)
            ...{
                GridViewRow gvr = gvTemp.Rows[i];
                for (++i; i < gvTemp.Rows.Count; i++)
                ...{
                    GridViewRow gvrNext = gvTemp.Rows[i];
                    if (gvr.Cells[cellIndex].Text == gvrNext.Cells[cellIndex].Text)
                    ...{
                        // 前１つ列の内容が一致かどうか
                        if ((cellIndex >= 1) &&
                            (gvr.Cells[cellIndex - 1].Text != gvrNext.Cells[cellIndex - 1].Text))
                        ...{
                            gvr.Cells[cellIndex].RowSpan = rowSpanNum;
                            rowSpanNum = 1;
                            break;
                        }
                        else
                        ...{
                            gvrNext.Cells[cellIndex].Visible = false;
                            rowSpanNum++;
                        }
                    }
                    else
                    ...{
                        gvr.Cells[cellIndex].RowSpan = rowSpanNum;
                        rowSpanNum = 1;
                        break;
                    }
                    if (i == gvTemp.Rows.Count - 1)
                    ...{
                        gvr.Cells[cellIndex].RowSpan = rowSpanNum;
                    }
                }
            }
        }