OBOUT - ASP.NET ComboBox - Load items on demand

ASP.NET ComboBox - Load Items On Demand

The items of the ComboBox can be loaded on-demand (via AJAX requests). The advantage of using this approach is that the items are loaded only when the end user types something into the input field. Thus, the page will load very fast because no item is loaded on page load.

In order to enable the on demand loading feature, set the EnableLoadOnDemand property to true. You also need to handle the LoadingItems server-side event, which is executed each time the ComboBox requests items from the server via AJAX. The server-side event handler will load all the items that match the text typed in the input field.

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