//custom preview section text
private void gridView1_CalcPreviewText(object sender, DevExpress.XtraGrid.Views.Grid.CalcPreviewTextEventArgs e) {
    e.PreviewText = CalculateMyPreviewText(e.RowHandle);
}

private string CalculateMyPreviewText(int rowHandle) {
    DataRow row = gridView1.GetDataRow(rowHandle);
    string mpgcity = row["MPG City"].ToString();
    string mpghwy = row["MPG Highway"].ToString();
    string description = row["Description"].ToString();
    if (string.IsNullOrEmpty(description))
        return string.Empty;
    return string.Format("MPG City: {0}, MPG Highway: {1}\n{2}", mpgcity, mpghwy, description);
}

//preview section image
private void gridView1_CustomDrawRowPreview(object sender, DevExpress.XtraGrid.Views.Base.RowObjectCustomDrawEventArgs e) {
    Bitmap image = GetRowImage(e.RowHandle);
    e.Cache.DrawImage(image, e.Bounds.X, e.Bounds.Y, image.Width, image.Height);
    Point textOrigin = new Point(e.Bounds.X + image.Width + 20, e.Bounds.Y + 4);
    Rectangle textRect = new Rectangle(textOrigin.X, textOrigin.Y, e.Bounds.Width - textOrigin.X, e.Bounds.Height - 8);
    string text = CalculateMyPreviewText(e.RowHandle);
    StringFormat format = e.Appearance.GetStringFormat();
    format.Trimming = StringTrimming.EllipsisWord;
    e.Cache.DrawString(text, e.Appearance.Font, e.Appearance.GetForeBrush(e.Cache), textRect, format);
    e.Handled = true;
}

private Bitmap GetRowImage(int rowHandle) {
    DataRow row = gridView1.GetDataRow(rowHandle);
    if (row["Image"] == System.DBNull.Value)
        return null;
    byte[] imageData = (byte[])row["Image"];
    return new Bitmap(new System.IO.MemoryStream(imageData));
}

'custom preview section text
Private Sub gridView1_CalcPreviewText(sender As Object, e As DevExpress.XtraGrid.Views.Grid.CalcPreviewTextEventArgs)
  e.PreviewText = CalculateMyPreviewText(e.RowHandle)
End Sub

Private Function CalculateMyPreviewText(rowHandle As Integer) As String
  Dim row As DataRow = gridView1.GetDataRow(rowHandle)
  Dim mpgcity As String = row("MPG City").ToString()
  Dim mpghwy As String = row("MPG Highway").ToString()
  Dim description As String = row("Description").ToString()
  If String.IsNullOrEmpty(description) Then
      Return String.Empty
  End If
  Return String.Format("MPG City: {0}, MPG Highway: {1}" & vbLf & "{2}", mpgcity, mpghwy, description)
End Function

'preview section image
Private Sub gridView1_CustomDrawRowPreview(sender As Object, e As DevExpress.XtraGrid.Views.Base.RowObjectCustomDrawEventArgs)
  Dim image As Bitmap = GetRowImage(e.RowHandle)
  e.Cache.DrawImage(image, e.Bounds.X, e.Bounds.Y, image.Width, image.Height)
  Dim textOrigin As New Point(e.Bounds.X + image.Width + 20, e.Bounds.Y + 4)
  Dim textRect As New Rectangle(textOrigin.X, textOrigin.Y, e.Bounds.Width - textOrigin.X, e.Bounds.Height - 8)
  Dim text As String = CalculateMyPreviewText(e.RowHandle)
  Dim format As StringFormat = e.Appearance.GetStringFormat()
  format.Trimming = StringTrimming.EllipsisWord
  e.Cache.DrawString(text, e.Appearance.Font, e.Appearance.GetForeBrush(e.Cache), textRect, format)
  e.Handled = True
End Sub

Private Function GetRowImage(rowHandle As Integer) As Bitmap
  Dim row As DataRow = gridView1.GetDataRow(rowHandle)
  If row("Image") = System.DBNull.Value Then
      Return Nothing
  End If
  Dim imageData As Byte() = DirectCast(row("Image"), Byte())
  Return New Bitmap(New System.IO.MemoryStream(imageData))
End Function