[VB.NET,C#] 用户自定义控件(含源代码) DataGridView添加背景图片

来源：http://www.codeproject.com/KB/grid/Datagridview_BackImage.aspx

VB.NET

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

C#

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
            }
        }
    }
}