Dropdownlist and Combobox are both UI (User Interface) elements that allow users to select an option from a list of choices, but they differ in their appearance and functionality.
A Dropdownlist is a UI element that presents a list of options in a dropdown menu. When the user clicks on the Dropdownlist, a list of options drops down, and the user can select one option. The selected option is displayed in the Dropdownlist as the currently selected option. Dropdownlist is a more compact UI element, suitable for cases when the list of options is long.
A Combobox is a UI element that combines a text box with a dropdown menu. The text box allows users to enter their own value, and the dropdown menu presents a list of predefined options. The user can select one option from the dropdown menu or enter a custom value in the text box. Combobox is a more flexible UI element, suitable for cases when users need to be able to select from predefined options or enter their own values.
In summary, Dropdownlist is a simpler UI element that presents a list of options in a dropdown menu, while Combobox combines a text box with a dropdown menu, providing more flexibility for users to select from predefined options or enter their own values.
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