Persisting MasterPage content in client browser between PostBacks

blondebier · May 11, 2007

Hi Guys,

As the title says, I'm looking for some way of making content from my MasterPage remain static and only change the content when the page is posted back to the server.

I have a header and a footer on my master page that remains completely static. Is it possible to keep these on the client and only have content post back. I.e. I have navigation and content that would change.

The only reason being that sometimes post backs can take a few seconds(5s) to complete and it would make my application better if the header and footer remained in the browser throughout.

Any ideas?

Cheers,

Francis

ca8msm · May 11, 2007

Yes, by using an AJAX approach. Microsoft's implementation of this can be found at

http://ajax.asp.net/

and will involve placing an UpdatePanel around your ContentPlaceholder.

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[URL unfurl="true"]http://aspnetlibrary.com[/url]

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blondebier · Jun 5, 2007

Thanks for the reply. I have been delving into AJAX and so far I am quite impressed.

Going back to my scenario detailed in my original post I wandered if you could just clear something up... as there don't seem to be any examples like this available.

Currently I have a MasterPage with 4 ContentPlaceHolders on it. Header (top), Footer (bottom), Navigation (middle left), WebContent (middle right).

I then have WebContentForms that only have 1 ContentPlaceHolder in the html i.e. WebContent and then code behind to do whatever is needed.

If I use the AJAX approach in this framework where would the UpdatePanel go? In my MasterPage or WebContentForm?

If my navigation throws an event that would normally response.redirect to another WebContentForm, would I get the ScriptManager on my MasterPage to catch this event and only refresh the UpdatePanel on my MasterPage?

Is it possible to fill an UpdatePanel with the contents of a WebContentForm to replace the response.redirect to the WebContentForm?

I'm new to AJAX so any tips would be greatly appreciated.

Ideally, i'd just like to make changes to my MasterPage as my whole application contains in excess of 100 WebContentForms.

Cheers for any advice.

blondebier · Jun 5, 2007

My other thoughts are could you bind an UpdatePanel to WebContentForm? Like using Databind with other controls?

jmeckley · Jun 5, 2007

you could place your header and footer into an UserControl and cache them then reference your header/footer on the master page.
example
header

Code:

<%@ Control ...%>
<%@ OutputCache Duration="1000" Shared="true" VarByParam="none" %>
<p>Header</p>

footer

Code:

<%@ Control ...%>
<%@ OutputCache Duration="1000" Shared="true" VarByParam="none" %>
<p>Footer</p>

master

Code:

<%@ Master ...%>
<%@ Register src="header.ascx" TagName="Header" TagPrefix="uc" %>
<%@ Register src="footer.ascx" TagName="Footer" TagPrefix="uc" %>
<html>
   ...
   <body>
      <form>
         <uc:Header id="myHeader" runat="server" />
         <asp:ContentPlaceHolder id="myPlaceHolder" runat="server" />
         <uc:Footer id="myFooter" runat="server" />
      </form>
   </body>
</html>

Jason Meckley
Programmer
Specialty Bakers, Inc.

blondebier · Jun 5, 2007

Thanks for the reply.

Aren't they still going to disappear when each page posts back though?

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Persisting MasterPage content in client browser between PostBacks

blondebier

Programmer

ca8msm

Programmer

blondebier

Programmer

blondebier

Programmer

jmeckley

Programmer

blondebier

Programmer

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