网上查了一下，实现的方式有好几种。之前使用的是下面这种在RowPostPaint事件中实现，效率不高。每次改变控件尺寸时都会执行。

private void MsgGridView_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
DataGridView gdView = sender as DataGridView;
System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(e.RowBounds.Location.X,
e.RowBounds.Location.Y,
gdView.RowHeadersWidth - 4,
e.RowBounds.Height);

TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(),
gdView.RowHeadersDefaultCellStyle.Font,
rectangle,
gdView.RowHeadersDefaultCellStyle.ForeColor,
TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
}

为了消除更新所带来的的闪屏问题，需要开启窗体和控件的双缓存，在窗体的构造函数中插入下面的代码。

private IGForm()
{
    //设置窗体的双缓冲
    this.SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.ResizeRedraw | ControlStyles.AllPaintingInWmPaint, true);
    this.UpdateStyles();

InitializeComponent();
    //
    //利用反射设置DataGridView的双缓冲
    Type dgvType = this.MsgGridView.GetType();
    PropertyInfo pi = dgvType.GetProperty("DoubleBuffered",
    BindingFlags.Instance | BindingFlags.NonPublic);
    pi.SetValue(this.MsgGridView, true, null);
}

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