Re: TImage problem! Help Please!

From: J French (erewhon_at_nowhere.uk)
Date: 12/16/04

  • Next message: Maarten Wiltink: "Re: Using an array to dynamically create menus..." 
    Date: Thu, 16 Dec 2004 08:04:44 +0000 (UTC)

    On Wed, 15 Dec 2004 19:16:29 -0000, "J West" <jimw@fluffypaws.co.uk>
    wrote:

    >What?
    >Sorry that doesn't make any sense at all!
    >The Image HAS to save out to a memory stream or a file in order to be able
    >to assign the picture to the relevant BLOB parameter in my ADOQuery.
    >As fr using button as custom forms I agree you can't if you wanted to do
    >something like that then use a panel but I am most cerainly not trying to do
    >this!
    >
    >Maybe I should have explained what I'm doing a little more clearly (Having
    >one of those weeks)!
    >
    >I was having difficulty getting an image into a mysql database. My
    >application is a multi tier app and my data classes weren't getting their
    >picture property set properly so I set up a little test bed to check my
    >assignments and found that my code was incorrect having sorted out my code I
    >was left with the problem I posted here which Mike Shkolnik has kindly
    >corrected for me and now the picture properties and the memory streams are
    >now working brilliantly.
    >
    >I am now however left with problems getting the images back out of the
    >database as my TImage on my form is only partially loading the image back
    >in.
    >
    >Hmmmmm! maybe I just need a brain transplant as I have now been trying to
    >get this thing working for two weeks and everytime I solve a problem I get
    >another one.
    >
    >anyway thanks muchly for the response

    I was a bit taken aback by the typecasting of

       TJPEGImage(Image1.Picture.bitmap)

    I'm surprized that it is valid - I now see that it is

    I've found that some uses of SaveToStream write an 8 byte header
    before the actual data - that is TGraphic.SaveToStream( Strm )

    Somewhere in the Delphi Help I saw something about saving graphics to
    a TBlobStream ... if they are going into a database

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