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HomeHomeDevelopment and...Development and...Building ExtensionsBuilding ExtensionsModulesModulesIn nemory ViewState lifetime is to shortIn nemory ViewState lifetime is to short
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11/19/2011 4:44 AM
 
Kristijan Cerkvenic


Joined: 5/12/2008
Posts: 24

Hi all,

I am implementing a business application as DNN module, where users are able to view and submit data. My module consists of a table showing some entries data. When a table line is clicked the page posts back and a corresponding form is shown.

As I this would be an intensive working application maximal performance would be needed / expected.

I was able to speed up my application by set “Page State Persistance” to “Memory (cache)” (in Host/Host Settings/Advanced Settings). Unfortunately after some time the “in memory” Viewstate gets lost and the post back returns an error.

This situation could be avoided by:

  1. persist the Viewstate in the database,
  2. set the cache lifetime same or grater to the time the user is logged out for inactivity.

Do you have any suggestions / guidelines / hints to implement any of the solutions above? Modifying DNN core would be acceptable. I am using DNN 6.

Any suggestion would be appreciate.

Thank you,

Kristijan
 
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11/19/2011 4:49 AM
 
Kristijan Cerkvenic


Joined: 5/12/2008
Posts: 24
OK, maybe "DotNetNuke Open Core" woulbe a better place to post this question, but I am sure a lot of experts are available here as well ; )
 
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11/19/2011 8:40 AM
 
Sebastian Leupold


Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

Sebastian Leupold's Avatar

www.dnnwerk.de
Joined: 3/8/2004
Posts: 46212
AFAIR there are 3rd party extensions, e.g. free module from DNN.tiendaboliviana.com, which support persisting viewstate in the database. another - maybe more performant - approach would be saving it in the file system. Regarding your module, did you try enabling partial rendering instead?
Cheers from Germany,
Sebastian Leupold

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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11/21/2011 7:14 AM
 
Kristijan Cerkvenic


Joined: 5/12/2008
Posts: 24
Hi Sebastian,

Thank you for your answer.

I am already using page partial rendering.

Regarding viewstate I was considering both of your suggestions:
1. DNN.tiendaboliviana.com has a module that is supposed to save viewstate on Databese, but in UI I was not able to find any setting about this feature.

2. So I decided for saving viewstate in the filesystem. When looking at the DNN core how I could implement this functionality I found out that there is a “DiskPageStatePersister” already built in DNN, but there is no possibility to switch it from the UI (only with this SQL: update HostSettings SET SettingValue='D' where SettingName='PageStatePersister'). I tried and it seems to work. Do you or anybody know why it is not used (anymore)?

Well as now there is “Remember Login” feature, I am going to change the file name to derive NOT from the session Id but from the UserId (for registered users only!) and I will have viewstate persistence that lives beyond the session.

Thank you again for your hints.
Kristijan
 
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