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No results if too many items

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MultiColumnComboBox
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Robert
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Robert asked on 11 Oct 2019, 12:58 PM

I have a MultiColumnComboBox that works as expected unless the search returns more than a certain number of items.  I'm not sure what the limit is, if I get 1500 results, it displays fine, but 5000 results and it is as if nothing matched and I get no items in the combo.

Is this a configurable setting, and is there a way to throw up a message saying something like "too many results, refine your search"?

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Veselin Tsvetanov
Telerik team
answered on 15 Oct 2019, 07:52 AM

Hello Robert,

As far as I can understand, upon filtering in the widget, the remote may return up to 5000 items, which are about to be rendered in the MultiColumnComboBox drop-down. Most probably the issue, in that case, is the inability of the browser to process and render the large amount of HTML that has to be generated.

In such a case, I would recommend you to use the virtualization functionality available for the widget. Than functionality re-uses HTML elements for displaying different portions of the list of items. That would allow you to generate and render only a portion of the entire list of HTML elements in the drop-down. Here you could find a Demo sample demonstrating how virtualization could be implemented for the MultiColumnComboBox. Here is some more info on the functionality and its configuration.

Regards,
Veselin Tsvetanov
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Robert
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answered on 15 Oct 2019, 11:51 AM
Thanks for that information.  So I'm assuming the control doesn't have anything built in to display a message like "too many results"?  I don't mind directing the user to put in more characters to limit the results to something more reasonable.
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Veselin Tsvetanov
Telerik team
answered on 17 Oct 2019, 09:58 AM

Hi Robert,

I am afraid that the Kendo drop-down widgets (including the MultiColumnComboBox) do not have a configuration option that would allow you to display user message when too many items are to be loaded in the pop-up. Having that said, I would recommend you to enable the virtualization functionality in the widget.

Regards,
Veselin Tsvetanov
Progress Telerik

Get quickly onboarded and successful with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers. Learn More.
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