Re: Detection of data changes in a page

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Hello,

to be honest: I did not tell you the whole story.
My ten pages are not called by a standard web browser but by a industrial
machine with an embedded terminal. This machine has a kind of primitive
self-written browser.
The page names are implemented in this browser and so the user can jump to
each page by a navigation panel that I can not influence.
So on server-side I have my session object and my page-load event to do
anything but I can not recognize the click on the navigation panel itself.
So I can not put a "was-it-saved-check" in a "on-navigation-click-event".

So you perhaps (and hopefully) understand why it is difficult for me to
implement a "data-changed-detection"...

The most difficult requirement spec in this project is that not only the
customers industrial machine as a terminal browser has to be served but as
well a standard browser in case of using e.g. a tablet PC. That means my
server architecture has to cover both client types.

I think it would go to much to detail to explain everything of this project
but I think it is a little bit more clear now what my problem is, isn't it
???


"Hitesh" <Hitesh@xxxxxxxxxxxxxxxxxxxxxxxxx> schrieb im Newsbeitrag
news:4B34B8A9-C7F2-44F0-BAEC-E3BCA7DAD88A@xxxxxxxxxxxxxxxx
>I really dont know how you have implemented the Jumping between pages is it
>a
> linear (clicking on Next) or its a non-linear like user can jump to any
> page
> they want.
> If you can give me some details about this then i can think on top of that
> so that we can minimize the disadvantages.
>
>
> "Frank Esser" wrote:
>
>> Thanks a lot for your answer.
>>
>> Yes, indeed, this would help me and I already thought about such a
>> solution.
>> There are some disadvantages, but I think I will do it this way.
>>
>> Disadvantages of this solution:
>> - Closing the browser will not check for data changes
>> - Jumping to another page will cause a redirect to the former page with
>> request for saving and then? I have to jump back to the intended page
>> afterwards. If there is another page between to display the save result
>> it
>> would be difficult for me to handle the whole workflow with different
>> states
>> and flags ("state machine"). It would be much more compfortable not to
>> leave
>> the page where data changes occured.
>>
>> Regards
>> Frank
>>
>> "Hitesh" <Hitesh@xxxxxxxxxxxxxxxxxxxxxxxxx> schrieb im Newsbeitrag
>> news:F12825AE-E001-49A3-8A22-26BB1CA01C1D@xxxxxxxxxxxxxxxx
>> > You can make use of session variables here, keep an array in the
>> > session
>> > having two coloumns one for the page name and other for the Save
>> > status,
>> > keep
>> > updating this array whenever user clicks the save button, defaults the
>> > Save
>> > status to No.
>> >
>> > Now i whenever user jumps from one page to another just run a loop to
>> > check
>> > for the save status in the session variable for the current page and
>> > then
>> > you
>> > can take the appropriate action you can popup a winow where in you can
>> > ask
>> > user about the confirmation and take the appropriate action.
>> >
>> > Hope this Helps.
>> >
>> > "Frank Esser" wrote:
>> >
>> >> Thank you, Josh.
>> >>
>> >> There are links between my pages but for some reasons I can not use
>> >> them
>> >> for
>> >> a data change check.
>> >> The user can also navigate through my project by other technics and so
>> >> that
>> >> does not work.
>> >>
>> >> I thought there might be any workaround or general solution even if it
>> >> is
>> >> not a common web behaviour to do anything on page unload.
>> >> I thought ASP.NET is a real alternative to windows forms
>> >> applications...
>> >> Perhaps in one of the future versions there is a build-in solution for
>> >> my
>> >> problem - I trust in Microsoft ;-)
>> >>
>> >> I anyone else has any idea I would be a very lucky programmer....
>> >>
>> >> "Josh" <s@xxxxx> schrieb im Newsbeitrag
>> >> news:%23USPnrcNFHA.4052@xxxxxxxxxxxxxxxxxxxxxxx
>> >> > Do you have links between the pages? If so put the check there,
>> >> > before
>> >> > the page redirects you can put in your mesage etc.
>> >> >
>> >> > As for the User shutting the browser. I can see why they might want
>> >> > that
>> >> > prompt, but it would not be standard "Web" behaviour. I would
>> >> > suggest
>> >> > you
>> >> > just have an onscreen graphic that indicates the data is unsaved,
>> >> > which
>> >> > changes when they save.
>> >> >
>> >>
>> >>
>> >>
>>
>>
>>


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