Can ComboBox in AjaxToolkit use lazy loading

Can I make ComboBox from AjaxToolkit make call to server every time new letter is 开发者_JAVA技巧entered and update ComboBox items?

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Have you looked at the AutoCompleteExtended available in the AjaxControltoolkit ? AutoCompleteExtender Demo
The control is similar to a combo box and it offers dynamic filtering of results based on user input.

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Please check Autocomplete extender in AJAX control toolkit.

The suggesions for the text entered in the textbox can be populated by using service method.

Check the properties ServiceMethod,ServicePath.