Re: Cache
From: Kevin Spencer (kspencer_at_takempis.com)
Date: 08/24/04
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Date: Tue, 24 Aug 2004 09:09:53 -0400
Note what I said:
> > The only way for any HTML object or script on the client to know
anything
> > about what is on the server is if it is present in the HTML document on
> > the
> > client.
Note what you said:
> Using <% ServerVariable%> can get values from the server then the java can
> access this value.
What you described is exactly (but badly demonstrated) what I was talking
about - writing data into the client HTML document. And BTW, JavaScript is
NOT Java.
Note what I said:
IOW, you can write out values into hidden HTML form fields, etc.,
> > if
> > you want to access that data on the client.
Note what you said:
> Also, posting or html control values can be captured on the aspnet
> codebehind side.
Am I missing something, or is your "correction" in agreement with what I
said?
If you don't understand the technology that well, keeping silent will make
people think you do.
-- HTH, Kevin Spencer .Net Developer Microsoft MVP Big things are made up of lots of little things. "Harry Simpson" <hssimpson@nospamphgt.net> wrote in message news:uSAXeeViEHA.2340@TK2MSFTNGP11.phx.gbl... > Not entirely true there: > > Using <% ServerVariable%> can get values from the server then the java can > access this value. > > Also, posting or html control values can be captured on the aspnet > codebehind side. > > Harry > > "Kevin Spencer" <kspencer@takempis.com> wrote in message > news:OdENQWViEHA.2764@TK2MSFTNGP11.phx.gbl... > > Okay, first, it is important to note that there is no "THE Cache" - There > > are many caching mechanisms in ASP.Net, including, but not limited to the > > Application Cache, SessionState, ViewState, and Page Output Cache. I can > > see > > from your message context that in this case, you're referring to the > > Application Cache, but I wanted you to know that you have plenty of > > options > > for caching data. Each of these options has different characteristics that > > make it more or less appropriate for the specific kind of aching you want > > to > > do. ViewState, for example, has Page scope, which means that it is > > accessible to a given user (client browser instance) and a given page, > > and > > passes away whenever the user navigates away from a page. SessionState is > > global to a user across pages, but not available to any other user (client > > browser). Application Cache is visible to all user Sessions and for the > > lifetime of the Application, or the timeout you set for it. > > > > ASP.Net has both server-side and client-side components, and never the > > twain > > shall meet. The server-side objects generate client-side HTML, which is > > then > > posted back to the server, etc. As HTTP is stateless, there is no > > communication between client and server, other than a Request (POST or > > GET), > > and the HTML document that is received by the client browser. Therefore, > > as > > these caching mechanisms are all on the server, there is no way to access > > anything on the server via the client (a bit oversimplified, but useful in > > this context). > > > > The only way for any HTML object or script on the client to know anything > > about what is on the server is if it is present in the HTML document on > > the > > client. IOW, you can write out values into hidden HTML form fields, etc., > > if > > you want to access that data on the client. > > > > -- > > HTH, > > Kevin Spencer > > .Net Developer > > Microsoft MVP > > Big things are made up > > of lots of little things. > > > > "Angel" <Angel@discussions.microsoft.com> wrote in message > > news:387A49E4-9BFB-42BB-8627-51C5D20D43CC@microsoft.com... > >> I am saving items in the cache in my code behind. By setting these items > > with > >> an expiration are these items only available for the page its being set > >> or > >> throughout the application? My next question is can these cache items be > >> accessed on the client side code(Javascript), If so, how? do you have any > >> javascript code out there that accesses these cached items from the code > >> behind? > >> > >> thank you in advance... > > > > > >
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