我通过设置HeaderCell给dataGridView加序号，但是当点击表头，执行默认排序方法时，表头都空了，该怎么解决

Question

我通过设置HeaderCell给dataGridView加序号，但是当点击表头，执行默认排序方法时，表头都空了，该怎么解决
            //添加序号
            int rowNumber = 1;
            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                row.HeaderCell.Value = rowNumber.ToString();
                rowNumber++;
            }

Answer 1

private void dgv_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
        {
            if (e.ColumnIndex.Equals(-1) && e.RowIndex > -1)
            {
                //セルを描画する
                e.Paint(e.ClipBounds, DataGridViewPaintParts.All);                //行番号を描画する範囲を決定する
                //e.AdvancedBorderStyleやe.CellStyle.Paddingは無視しています
                Rectangle indexRect = e.CellBounds;
                indexRect.Inflate(-2, -2);
                //行番号を描画する
                TextRenderer.DrawText(e.Graphics,
                    (e.RowIndex + 1).ToString(),
                    e.CellStyle.Font,
                    indexRect,
                    e.CellStyle.ForeColor,
                    TextFormatFlags.Right | TextFormatFlags.VerticalCenter);
                //描画が完了したことを知らせる
                e.Handled = true;            }
        }

Answer 2

在CellPainting事件中写就行了，日文注释去掉就行了

Answer 3

我也来个，
    private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            Rectangle rectangle = new Rectangle(e.RowBounds.Location.X,
                e.RowBounds.Location.Y,
                dataGridView1.RowHeadersWidth - 4,
                e.RowBounds.Height);            TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), 
                dataGridView1.RowHeadersDefaultCellStyle.Font,
                rectangle,
                dataGridView1.RowHeadersDefaultCellStyle.ForeColor, 
                TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
        }