باید با کد نویسی اینکارو کرد.اینم کد
public class usrDataGridView : DataGridView
{
private Image m_Image;
public usrDataGridView()
{
this.m_Image = Image.FromFile("F:\\GridviewTest\\Test\\Test\\bin\\Debug\\Images\\water_mark.jpg");
}
protected override void PaintBackground(System.Drawing.Graphics graphics, System.Drawing.Rectangle clipBounds, System.Drawing.Rectangle gridBounds)
{
base.PaintBackground(graphics, clipBounds, gridBounds);
graphics.DrawImage(this.m_Image, gridBounds);
}
public Image BackImage
{
get { return this.m_Image; }
set { this.m_Image = value; }
}
}
اگر موفق نشدی نمونه برات میزارم