Default Item Load Mode
The ASPxComboBox editor obtains its items in the following manner:
The editor retrieves all data items from the bound data source (defined by the ASPxAutoCompleteBoxBase.DataSourceID or ASPxAutoCompleteBoxBase.DataSource property) and loads them in the application server’s memory;
The editor sends all list items to the client side, and displays them within the editor’s dropdown list.
In this mode, the control executes all data operations (such as scrolling, filtering) with items on the client without sending a round trip to the server.
This default mode is useful when the ASPxComboBox editor works with a small data sample - that is, Multi-Column Mode is not used (or there is a small number of columns) and the number of data source items is not large (numbered in the tens or hundreds rather than thousands). For larger amounts of data, you may need to use On-Demand Item Load Mode or Dynamic List Population mode.