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Hi all,
I need a great help. I want to load nearly 20000 records to the listbox.
It is taking more than a minute. But i have an image on each rows.
I need load 20000 datas with in 5 seconds.
Your help is very much appreciated.
Thanks
Guru
Is paging of the data not possible?
Hi thanks for your presence on this.
I dont want paging. I want a minimum of More than 5000 records in single page that can be viewed over vertical scrolling
we tried live Data scrolling by keeping rows = 30 , Even it takes 28 seconds to load first 30 Records.
In my application am using Hibernate to get data from database to the ZK list box.
and i want 5000 Records per page to display. In best performance.
Assist me on the same.
Thank you so much on this.
Please have a look on this
<listbox id="radStudy" checkmark="true" model="@{myList}" style="font-size:10px;" multiple="true" rows="30" fixedLayout="true" visible="false" width="1550px">
>> we tried live Data scrolling by keeping rows = 30 , Even it takes 28 seconds to load first 30 Records.
Are you sure that only the UI is "slow"? Is the picture a from the database?
The are 2 problems handling huge data:
DAO/Model
depending on your model/DAO-tier all data is loading for the first time
--> there is need for paging
ZK, next problem
Your model is smart enough to handle paging but ZK creates all required
(empty) UI elements at once
Note: I've write paging, but it's possible to use paging models for livescrolling.
How you can solve this issue:
- First you need to know, how long your model needs to load (i've loaded more items in less time)
- make your model ready for paging (if the whole loading time is to slow)
- implement your onwn paging/scroll logik
--> Stefan (aka terrytornado) has implemented a paging model layer in his demoproject
other solutions:
--> there is also a feature in the ZK-EE-Edition for hugedata handling
--> create a growing model for livescrolling and pagemodel like this.
[You can find some code for the growing model in the forum, i did not find the time to implement a JPA variant for this....]
--> if your loading time is bad, you should exclude the images from the model and create a url-source instead
/Robert
Asked: 2010-12-29 00:06:57 +0800
Seen: 629 times
Last updated: Dec 29 '10
