Re: why browser cache setting affects program behavior? Fix?

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

1) if you use server.treansfer, you don't need a cookie, get the data you
pass in the cookie from the posting page

2) if you want the link to work, when render append a random number or guid
to the url (ex xyz.asp?n=16546565656). this make the url unique, so the
cache will not be used.

-- bruce (sqlwork.com)


"junlia" <junlia@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:36621BE6-AB15-4D1F-9488-F6D6BACD0BE4@xxxxxxxxxxxxxxxx
> Hi All,
>
> I am working on a project that acts as a bridge. It does some checking
> with
> post xml data, and then redirects the request to an appropriate page.
> However, we find that depends on the browser cache setting (and OS), the
> program behaves differently.
>
> This is how it should work:
> 1. The client program opens a webbrowser control, using navigate2 method
> to
> post xml data to my aspx pages, eg abc.aspx
> 2. My aspx pages process the requests, setup cookies in order for a
> successful redirect to another page ( eg. xyz.asp) on the servers.
> 3. I have a hidden hyperlink on the aspx page, and after processing, use
> JavaScript to link.click the hyperlink and do the redirect.
> 4. The client browser displays the appropriate page (xyz.asp).
>
> However, we run into problems. For most of the OS and IE settings, IE
> Cache
> setting needs to the default setting -- Automatically check newer versions
> of
> stored page. Otherwise if the cache setting is set to check for every
> visit,
> the redirect will not work, and instead it post back to the page
> (abc.aspx)
> instead of going to xyz.asp page. This results into empty post data
> scenario.
>
> We also encountered that the IE cache setting has to be set to check for
> every visit in order for it to behave properly.
>
> It seems the problem is somewhat related to IE cache setting, and maybe
> somehow, we may be able to disable the auto posting back to the page
> itself
> in my aspx page.
>
> We will need to have the hyperlink so that when we do a redirect to
> another
> page, so cookie will be set for xyz.asp page. (response.redirect and
> server.transfer are not reliable for setting cookies)
>
> My questions are:
> 1. What does the browser do under each option in the cache setting? Why
> would it affect the program so?
> 2. Is there a way to disable the form post back to itself, how?
> 3. If your suggestion is to get rid of the server side hyperlink, what is
> the alternative for redirecting with cookie working?
>
> Thanks much,
> Junlia
>


.

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