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Images in Microsoft Access

 
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Michael Corby
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PostPosted: Wed Oct 11, 2006 10:13 pm    Post subject: Images in Microsoft Access Reply with quote


Hi

I am loading Jpeg images to a OLE Object field in Access using
LoadFromStream in my code.

When I then examine the table in Access, the information displayed
in the field column has changed from "Package" to "Long Binary Data",
and double clicking on the column no longer displays the image, but
gives a message "A problem occurred while communicating with the
OLE Server or ActiveX control".

The following is the code for updating the Database :-


TField *field = (wDataModule->tPlants->FieldByName("JPGImage"));
TBlobField *blobField = dynamic_cast<TBlobField*>(field);
String pictureName;
TMemoryStream *stream = new TMemoryStream;

pictureName = "C:\\MC\\Images\\Tulips.jpg";
stream->LoadFromFile(pictureName);

wDataModule->tPlants->Edit();
blobField->LoadFromStream(stream);
wDataModule->tPlants->Post();

delete stream;
delete field;

Any help appreciated

Michael Corby
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Antonio Felix
Guest
PostPosted: Wed Oct 11, 2006 10:39 pm    Post subject: Re: Images in Microsoft Access Reply with quote


"Michael Corby" <mcorby (AT) indigo (DOT) ie> wrote:
Quote:
Hi

I am loading Jpeg images to a OLE Object field in Access using
LoadFromStream in my code.

When I then examine the table in Access, the information displayed
in the field column has changed from "Package" to "Long Binary Data",
and double clicking on the column no longer displays the image, but
gives a message "A problem occurred while communicating with the
OLE Server or ActiveX control".



Hi Michael,

Try to use

....
wDataModule->tPlants->Edit();
stream->Position = 0; // <-----------
blobField->LoadFromStream(stream);
wDataModule->tPlants->Post();
....


HTH
Antonio
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Michael Corby
Guest
PostPosted: Thu Oct 12, 2006 6:18 pm    Post subject: Re: Images in Microsoft Access Reply with quote


Hi Antonio

Inserting this line
Quote:
stream->Position = 0;
makes no difference to attempting to display when Access

is loaded, but I am now able to display the images
on my form, which is what I wanted.

Thanks for the help.

Michael Corby




"Antonio Felix" <nomail (AT) nm (DOT) pt> wrote in message
news:452d2c3c$1 (AT) newsgroups (DOT) borland.com...
Quote:

"Michael Corby" <mcorby (AT) indigo (DOT) ie> wrote:
Hi

I am loading Jpeg images to a OLE Object field in Access using
LoadFromStream in my code.

When I then examine the table in Access, the information displayed
in the field column has changed from "Package" to "Long Binary Data",
and double clicking on the column no longer displays the image, but
gives a message "A problem occurred while communicating with the
OLE Server or ActiveX control".



Hi Michael,

Try to use

...
wDataModule->tPlants->Edit();
stream->Position = 0; // <-----------
blobField->LoadFromStream(stream);
wDataModule->tPlants->Post();
...


HTH
Antonio
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