Does SplitButton or DropDownButton have a preset behavior can be like ComboBox?

[tp1415926535]

It seems that SplitButton or DropDownButton doesn't have such a thing as selectedItem, if you want to display the selected item like ComboBox, you need to assign all the parameters of the selected item to the Button once, which is quite troublesome.

[batzen]

That's because they were not designed as selectors.
You could use a ComboBox if you'd want selection behavior.
What is your use case to use DropDown or SplitButton as selectors?

[tp1415926535]

For example, switching the pen of a drawing tool. There are pen, ballpoint, brush, etc. You can drop down to select an item as the current drawing way, but only the current pen name and icon are displayed

[batzen]

Ah, ok.
The best solution would be to re-style/re-template the ComboBox then.