winform datagridview显示序号

要在WinForm的DataGridView中显示行号，可以通过在DataGridView的RowPostPaint事件中编写代码来实现。具体步骤如下：

1. 在DataGridView的属性窗口中，找到Events（事件）选项，并选择RowPostPaint事件。

2. 在RowPostPaint事件的代码编辑器中，可以使用以下代码来实现显示行号的功能：

private void dataGridView1_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
{
var dgv = sender as DataGridView;
if (dgv != null)
{
Rectangle rect = new Rectangle(e.RowBounds.Location.X, e.RowBounds.Location.Y, dgv.RowHeadersWidth - 4, e.RowBounds.Height);
TextRenderer.DrawText(e.Graphics, (e.RowIndex + 1).ToString(), dgv.RowHeadersDefaultCellStyle.Font, rect, dgv.RowHeadersDefaultCellStyle.ForeColor, TextFormatFlags.VerticalCenter | TextFormatFlags.Right);
}
}

3. 以上代码会在每行绘制时，在行号列的单元格中显示当前行的序号。需要注意的是，要确保DataGridView的RowHeadersVisible属性设置为True，以显示行号列。

这样，当你运行应用程序并加载数据到DataGridView中时，每一行都会显示对应的行号。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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