Adding large amount of items on client side

[Lambros]

Hello,

How can i quickly add 5000 items to the list control on client side?

I can use the _addNewItems("", options) in RadComboBox, do you have any similar method in RadListBox control which allows to avoid creating RadListItem javascript objects one by one?

Thanks

[Simon]

Hi Lambros,

No, RadListBox does not expose such a method.

Have you considered using Ajax and server-side addition of Items? In this way, you would achieve something similar to pure client-side rendering only faster.

Best wishes,
Simon
the Telerik team

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[Lambros]

Hello Simon,

Alas i cannot use the Ajax and server-side addition of Items because due to the project design i cannot use postbacks, i am getting list of items from pagemethod and need to add them on the client side. I am able to modify the contents of the page method return value, but i cannot add items on th server.

Is there any workaround to make client side adding work fast?

Thanks

[Simon]

Hi Lambros,

Well, you could certainly use a workaround. It would take some time to complete the whole operation, yet the browser would not hang until it finishes processing, which I believe is what you are trying to avoid.

So, you could add Items with a timeout, e.g.:

for (var i = 0, i < 5000; i++) {
    ...
    window.setTimeout(function() { listBox.get_items().add(...); }, 0);
}

Please let me know how it goes.

All the best,
Simon
the Telerik team

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