如何在WindowsForm中合并单元格datagridview c＃

Question

我在下面的MySql数据库中有datagridview：

我想要将数据行组合起来具有相同的值。结果如下所示：

Answer 1

此功能可根据需要合并单元格：

private void MergeCells()
{ 
    HierarchyItem rowItem1 = grid.RowsHierarchy.Items[0];
    HierarchyItem columnItem1 = grid.ColumnsHierarchy.Items[0];

    // create a custom cell style.
    GridCellStyle style = new GridCellStyle();
    style.FillStyle = new FillStyleSolid(Color.FromArgb(255, 0, 175, 240));
    style.Font = new Font(this.Font.FontFamily, 11.0f, FontStyle.Bold);
    style.TextColor = Color.White;
    GridCellStyle orangestyle = new GridCellStyle();
    orangestyle.FillStyle = new FillStyleSolid(Color.FromArgb(255, 254, 122, 1));
    orangestyle.Font = new Font(this.Font.FontFamily, 10.0f, FontStyle.Bold);
    orangestyle.TextColor = Color.White;
    grid.CellsArea.SetCellTextAlignment
    (rowItem1, columnItem1, ContentAlignment.MiddleCenter);
    // set the cell span to 1 row and 5 columns.
    grid.CellsArea.SetCellSpan(rowItem1, columnItem1, 1, 5);
    // set the merged cell value and style.
    grid.CellsArea.SetCellDrawStyle(rowItem1, columnItem1, style);
    // set the cell span to 1 row and 2 columns.
    grid.CellsArea.SetCellSpan(grid.RowsHierarchy.Items[1], columnItem1, 1, 3);
    grid.CellsArea.SetCellDrawStyle
    (grid.RowsHierarchy.Items[1], columnItem1, orangestyle);

    // set the merged cell value.

    // set the cell span to 1 row and 2 columns.
    grid.CellsArea.SetCellSpan
    (grid.RowsHierarchy.Items[1], this.grid.ColumnsHierarchy.Items[3], 1, 2);

    // set the merged cell value.
    grid.CellsArea.SetCellDrawStyle
    (grid.RowsHierarchy.Items[1], this.grid.ColumnsHierarchy.Items[3], orangestyle);
}