Displaying different image classes(blob) in DataGrid

Hi Sakkie!
A similar question was answered in our Support Center ID: DQ13981 (http://www.devexpress.com/issue=DQ13981). The idea is to store the correspronding graphic class name within an additional database field.
Thanks,
Nicolas.

Hi, I might be in danger here of sounding stupid, but here goes: I have read the issue you refer to before hand, and even though I did try the proposed solution, I could not get it to work. First of all I could not get the event to fire? - when/how is this handler called? Secondly, if I revert to storing the GraphicsClass in the DB, am I not again limited to the built in classes (TBitmap, TJPEGImage, TMetafile, TIcon)? I have since downloaded and installed the GraphicEx library, which allows me to load a lot more images into a TImage (and TcxImage as well) If I'm able to load these images, surely there must be a way to display these images directly in a grid. If its a case of specifying the graphics class, what graphics class do I use for a PNG or TIFF file?

Hi!
To make it fire, the Image column's GraphicClassName property should be unassigned, this is defined by the following code:
…
function TcxCustomImageProperties.GetGraphicClass(AItem: TObject;
  ARecordIndex: Integer; APastingFromClipboard: Boolean = False): TGraphicClass;
begin
  Result := FGraphicClass;
  if Result = nil then
  begin
    if APastingFromClipboard then
      Result := TBitmap;
    if Assigned(FOnGetGraphicClass) then //<<<<<<<<<<<
      FOnGetGraphicClass(AItem, ARecordIndex, APastingFromClipboard, Result);
  end;
end;
Please make sure that your GraphicClassName property is empty. As for the second question, the standard Delphi TGraphicClass does not support the PNG format, so we cannot provide this feature in our Suites directly. But if you use some 3rd-party component in the Delphi system which provides access to the PNG images via the TGraphicClass, then this will force to load the PNG pictures into the Grid. You should add your unit which supports your graphic class to the "Uses" clause and assign this graphic class to a column cell via the OnGetGraphicClass event (at design time, the cxGrid does not allow you to do this).
Thanks,
Nicolas.