Client side performance using a lot of RadComboBox on RadGrid

[Sam]

Hi Telerik Team,

My RadGrid have 5 columns ( 4 GridBoundColumn, 1 template column with RadComboBox control).
I change page size of my RadGrid to 2k records anh it's too slow to render my Radgird.

View source of the page, each RadComboBox will be added a script bellow:

Sys.Application.add_init(function() 

$create(Telerik.Web.UI.RadComboBox, {"_dropDownWidth":0,"_height":0,"_isAspNet35":true,"_skin":"Web20","_uniqueId":"rdgDemo1$ctl00$ctl200$txtProjectPaid_20101","clientStateFieldID":"rdgDemo1_ctl00_ctl200_txtProjectPaid_20101_ClientState","collapseAnimation":"{\"duration\":450}","expandAnimation":"{\"duration\":450}","itemData":[]}, null, null, $get("rdgDemo1_ctl00_ctl200_txtProjectPaid_20101"));

});

So, if my radgrid have 2k records, my page will have 2k above script.  It's very slow....

Could you give me any solutions to solve this?

Thanks!

[Sam]

Please, help me! Thanks so much!

[Sam]

Anyone can help me? It's very urgent for me. Thanks!

[Dimitar Terziev]

Hello,

The experienced behavior is the expected one considering the amount of markup which will be rendered on the page. In order to increase the performance you have two options, the first one is to load the items of these template comboboxes on demand. This should increase the performances upon initial load since the markup for the items won't be rendered on the page. The second approach would be to use the Simple rendering of the RadComboBox. Please note that some of the functionalities are not availble when this rendering is being used. Here is a help article on this matter.

Kind regards,
Dimitar Terziev
the Telerik team