Imports System.ComponentModel
Imports System.Drawing

Public Class UserDataGridView
Inherits Windows.Forms.DataGridView
Private m_Image As Image

Public Sub New()
'Me.m_Image = Drawing.Image.FromFile("C:\BG.jpg")
    End Sub

Protected Overrides Sub PaintBackground(ByVal graphics As Graphics, ByVal clipBounds As Rectangle, ByVal gridBounds As Rectangle)
MyBase.PaintBackground(graphics, clipBounds, gridBounds)
        graphics.DrawImage(Me.m_Image, gridBounds)
End Sub

'添加图片属性
    Public Property BackImage() As Drawing.Image
Get
Return Me.m_Image
End Get
Set(ByVal value As Drawing.Image)
Me.m_Image = value
MyBase.Refresh()
End Set
End Property
End Class

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

namespace UserDataGridView
{
public partial class UserDataGridView : DataGridView
    {
private Image m_Image;

public UserDataGridView()
        {
            InitializeComponent();
//this.m_Image = Image.FromFile("C:\\BG.jpg");
        }

/// <summary>重写PaintBackground</summary>
        protected override void PaintBackground(Graphics graphics, Rectangle clipBounds, Rectangle gridBounds)
        {
base.PaintBackground(graphics, clipBounds, gridBounds);
            graphics.DrawImage(this.m_Image, gridBounds);
        }

/// <summary>设置背景图片</summary>
        public Image BackImage
        {
get
            {
return this.m_Image;
            }
set
            {
this.m_Image = value;
base.Refresh();  // 重新加载
            }
        }
    }
}