ASP.NET Combo Box Performance Improvements - v2010 vol 1

22 April 2010

Check out this great new performance feature of our ASP.NET combo box control for the DXperience v2010.1 release.

You can now manually populate lists with items based on the currently applied filter criteria. This means that you can significantly decrease web server workload by loading only a subset of all items when working with large datasets.

For instance, when using a large data source, you can only request a few records to be visible on the screen. The rest of the items can be loaded on demand, while the user is scrolling the list.

asp-combo-large-dataset

Please note: This performance update only applies to the ASPxComboBox.

This on-demand loading helps keep your websites fast while still giving the users the data they need to see.

Your Search Box

Combine this feature with the ‘incremental filtering using contains’ feature and you can create your own Google, Bing or Yahoo style search box:

yahoo search

Test drive this feature now by downloading the DXperience v2010.1 beta from your client center account. But you will need a DXperience subscription to get the beta.

Drop me a line below with your thoughts on this great new feature of the ASPxComboBox.

7 comment(s)
Gadi

which property need to change for large data source?

12 May, 2010
Mehul Harry (DevExpress)

@Gadi,

Check out this online demo and it's source code at the bottom of the demo page to learn how:

demos.devexpress.com/.../LargeDataSource.aspx

12 May, 2010
Lars Christiansen

Could you please provide us with an example on how to use this feature in relation to ASPxComboBox used as lookup in a grid.  It doesnt seem to have improved the speed here.

13 May, 2010
Mehul Harry (DevExpress)

@Lars,

Sure, check out the online demo with the source code as well:

demos.devexpress.com/.../LargeDataSource.aspx

17 May, 2010
Lars Christiansen

Hm... "ASPxComboBox used as lookup in a grid" ??

17 May, 2010
Rodrigo Lopes

Hi Mehul, the url that you post isn´t work and I need to know how to work with large data source. I hope you fix it as soon as possible. thx.

8 July, 2010
Mehul Harry (DevExpress)

@Rodrigo,

The demo is working again, thanks for the heads up:

demos.devexpress.com/.../LargeDataSource.aspx

9 July, 2010

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