dataGridView 显示行号

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dataGridView后想添加一列编号

1，添加一列，插入到第一列

DataGridViewTextBoxColumn column = new DataGridViewTextBoxColumn();                column.HeaderText = "编号";                column.DataPropertyName = "ID";                int i = dataGridView1.RowCount;                dataGridView1.Columns.Insert(0, column);                for (int j = 0; j < i;j++ )                {                   dataGridView1.Rows[j].Cells[0].Value=Convert.ToString(j+1);                }

2，添加dataGridView的RowPostPaint事件，在dataGridView绘制后在绘制

 private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)        {            try            {                SolidBrush v_SolidBrush = new SolidBrush(dataGridView1.RowHeadersDefaultCellStyle.ForeColor);                int v_LineNo = 0;                v_LineNo = e.RowIndex + 1;                string v_Line = v_LineNo.ToString();                e.Graphics.DrawString(v_Line, e.InheritedRowStyle.Font, v_SolidBrush, e.RowBounds.Location.X + 15, e.RowBounds.Location.Y + 5);            }            catch(Exception ex)            {                MessageBox.Show("添加行号时发生错误，错误信息：" + ex.Message, "操作失败");            }        }

效果如下：

数据库中午编号这一列