Say it ain't so regarding "Save" command!

[Donald Asbridge]

Thanks, Mark, that ought to work!  :-)

Don

------------------



On Jul 30, 2005, at 9:39 AM, Mark Wieder wrote:

> Donald-
>
> Saturday, July 30, 2005, 8:49:42 AM, you wrote:
>
> DA> Can a user enter and then save info into a standalone application? 
>  Or
> DA> something?
>
> Sure. There are any number of ways to do this. Rev would be a pretty
> sorry excuse for an app builder if you couldn't.
>
> The problem you've run across is that applications can't modify
> themselves. This isn't something that's peculiar to rev - it's built
> into the operating system. So you need to do something else.
>
> One way would be to save data in text files. Or use a database. Or
> some other format as an external file.
>
> Another way is to have a mainstack and substacks as separate files.
> The main stack can modify the substack files without any problem. I
> have some apps where the main logic is in the mainstack and the data
> is in separate substacks. Just remember when you're building the
> standalone to specify that the substacks should be separate.
>
> A technique that builds on this is to have your mainstack nothing more
> than a splash screen that then launches a substack with the program
> logic and other substacks for the modifiable data. This makes updating
> the program for your users easy because you just have to ship the
> small program substack.
>
> You can also clone a substack in memory and save it as a separate data
> stack, then remember to load it when you start again. Or allow the
> user to load one of several saved data substacks.
>
> -- 
> -Mark Wieder
>  mwieder at ahsoftware.net
>
>
>
>
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