private void dataGridview1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
  if (dataGridview1.Columns[e.ColumnIndex].Name.Equals("Image"))
  {
    string path = e.Value.ToString();
    e.Value = GetImage(path);
  }
}
public System.Drawing.Image GetImage(string path)
{
  System.IO.FileStream fs = new System.IO.FileStream(path, System.IO.FileMode.Open);
  System.Drawing.Image result = System.Drawing.Image.FromStream(fs);

  fs.Close();

  return result;

}