如何更改Datagridview行标题

Question

datagridview 很好地显示了数据，但我想按顺序查看数字而不是行标题处的指针。

如图所示，标题单元格中有一个箭头。我不想这样，当我编写下面的代码时，只有当鼠标悬停在数字上时才会出现数字。

for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
    dataGridView1.Rows[i].HeaderCell.Value = (i + 1).ToString();
}

我想直接在行标题中看到它，如下图所示

Answer 1

您可以自己绘制行标题：

private void DataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
    // Draw only if the cell is the row header: e.ColumnIndex == -1
    // and the row is not the column header: e.RowIndex >= 0
    if (e.ColumnIndex == -1 && e.RowIndex >= 0) {
        bool isSelected = (e.State & DataGridViewElementStates.Selected) != 0;
        e.PaintBackground(e.ClipBounds, isSelected);
        if (isSelected) {
            e.PaintContent(e.ClipBounds); // Paints the selection arrow
        }
        var grid = (DataGridView)sender;
        var point = new PointF(15, e.CellBounds.Top + e.CellBounds.Height / 2 - 8);
        e.Graphics!.DrawString($"{e.RowIndex + 1}", grid.Font, Brushes.Black, point);
        e.Handled = true;
    }
}