Multicolumn RadCombobox Visible after postback using EnableLoadOnDemand

[henk]

I use a prometheus combobox. I use header and item templates. I have set EnableLoadOnDemand = true. I use the ItemsRequested eventhandler.

The control is on the page initially, but in a hidden panel (so not rendered). After a postback the panel is visible. This combox control looks ok, but the dropdown does not work at all.

The dropdown does work if the control is initaly rendered.

Is there any work around to this situation, such as registering javascript during the ajax callback?

[Rosi]

Hi Henk,

Please try the latest internal build attached to this message.

Hope this helps

Regards,
Rosi
the Telerik team

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[henk]

Hi Rosi,

Thanks for the suggestion. I had already tried this hotfix build. Unfortunately the hotfix didn't solve my problem.

I have downgraded. I use the previous version, i.e., the RadControls for ASP.NET, combobox again. The ExternalCallBackPage property of the previous RadComboBox seems to be necesary in order to implement a multicolumn combobox that is not visible on the initial page render.

I hope future versions of the Prometheus RadComboBox will get something like an ExternalCallBackPage property. Or that loading on demand using a webservice will get support for a multicolumn combobox.

regards