c#datagridview

//保证显示当前活动单元格
this.Invoke(new Action(() =>
{
 dataGridView1.CurrentCell = dataGridView1.Rows[index].Cells[0]; 
}));

//添加新行
index=dataGridView1.Rows.Add();
dataGridView1.Rows[index].Cells[0].Value = (index+1).ToString();//添加内容
dataGridView1.Rows[index].Cells[1].Value = ip;//添加内容
dataGridView1.Rows[index].Cells[2].Value = DateTime.Now.ToString("yyyy/MM/dd hh:mm:ss"); //添加内容

    //鼠标右键弹出菜单
  if (e.Button == MouseButtons.Right)
  {
                if (e.RowIndex >= 0)
                {
                    //若行已是选中状态就不再进行设置
                    if (dataGridView1.Rows[e.RowIndex].Selected == false)
                    {
                        dataGridView1.ClearSelection();
                        dataGridView1.Rows[e.RowIndex].Selected = true;
                    }
                    //只选中一行时设置活动单元格
                    if (dataGridView1.SelectedRows.Count == 1)
                    {
                        dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
                    }
                    //弹出操作菜单
                    contextMenuStrip1.Show(MousePosition.X, MousePosition.Y);
                }
  }  

 //表头自动序号
private void dataGridView1_RowPostPaint_1(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            SolidBrush b = new SolidBrush(this.dataGridView1.RowHeadersDefaultCellStyle.ForeColor);
            e.Graphics.DrawString((e.RowIndex + 1).ToString(System.Globalization.CultureInfo.CurrentUICulture), this.dataGridView1.DefaultCellStyle.Font, b, e.RowBounds.Location.X, e.RowBounds.Location.Y + 4);

        }