让DataGridView显示行号


using  System;
using  System.Collections.Generic;
using  System.ComponentModel;
using  System.Data;
using  System.Drawing;
using  System.Drawing.Imaging;
using  System.Text;
using  System.Windows.Forms;

namespace  DrawRowIndex
{
    
public   partial   class  Form1 : Form
    {
        
public  Form1()
        {
            InitializeComponent();
        }

        
private   void  Form1_Load( object  sender, EventArgs e)
        {
            dataGridView1.Dock 
=  DockStyle.Fill;
            dataGridView1.DataSource 
=  ImageCodecInfo.GetImageDecoders();
        }

        
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);
        }
    }
}
 

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