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 | | From: | Alex | | Subject: | Update Resources in DB | | Date: | Thu, 25 Nov 2004 10:12:45 -0000 |
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 | Hi guyz,
I am trying to run an update on a resource database.
There don't seem to be such a thing as updating, but more of a delete/add
resource...
So here is the code :
resIndex = DmFindResourceType (updDB, 'type', idx);
while (resIndex != 0xFFFF)
{
err = DmResourceInfo (updDB, resIndex, NULL, &id, NULL); // get the id
newH = DmGetResourceIndex (updDB, resIndex); // get the handle
oldIndex = DmFindResource (bookDB, 'type', id, NULL); // find the old
index
if (oldIndex != 0xFFFF)
{
err = DmRemoveResource (bookDB, oldIndex); // remove the old resource
from the database
if (err == errNone)
{
err = DmAttachResource (bookDB, newH, 'type', id); // attach the new one
if (err == errNone)
{
// arrives here, no error, nothing
// but the data is not what it should be
}
}
}
idx++;
resIndex = DmFindResourceType (updDB, 'type', idx); // loop to find other
resources
}
Am I missing something obvious ?
Another question would be, how to do the same "update" but with a database
on the card ? Will I have to import it first and then run the same algorithm
as above ? Or write my own VFS database update function :)
Kindest Regards, Alex
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| | From: | Baxter | | Subject: | Re: Update Resources in DB | | Date: | Thu, 25 Nov 2004 10:43:20 -0800 |
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| This is off the top of my head (I've not actually done this), but I think
you'll need to lock down your newH handle and actually write something to a
buffer before you attach it.
--
-------------------------------------------------------------------------
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-------------------------------------------------------------------------
"Alex" wrote in message
news:41a5ab87$0$22503$7b0f0fd3@reader.news.newnet.co.uk...
> Hi guyz,
>
> I am trying to run an update on a resource database.
> There don't seem to be such a thing as updating, but more of a delete/add
> resource...
>
> So here is the code :
>
> resIndex = DmFindResourceType (updDB, 'type', idx);
> while (resIndex != 0xFFFF)
> {
> err = DmResourceInfo (updDB, resIndex, NULL, &id, NULL); // get the id
>
> newH = DmGetResourceIndex (updDB, resIndex); // get the handle
> oldIndex = DmFindResource (bookDB, 'type', id, NULL); // find the old
> index
> if (oldIndex != 0xFFFF)
> {
> err = DmRemoveResource (bookDB, oldIndex); // remove the old resource
> from the database
> if (err == errNone)
> {
> err = DmAttachResource (bookDB, newH, 'type', id); // attach the new
one
> if (err == errNone)
> {
> // arrives here, no error, nothing
> // but the data is not what it should be
> }
> }
> }
>
> idx++;
> resIndex = DmFindResourceType (updDB, 'type', idx); // loop to find
other
> resources
> }
>
> Am I missing something obvious ?
>
> Another question would be, how to do the same "update" but with a database
> on the card ? Will I have to import it first and then run the same
algorithm
> as above ? Or write my own VFS database update function :)
>
> Kindest Regards, Alex
>
>
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