WPF Editable ComboBox Text Search Behavior

I have a ComboBox with binded an Entity ObservableCollection on ItemsSource. Like this:

Key    Desc1   Desc2
C0001  myDesc  myDesc
D0001  myDesc  myDesc
A0001  myDesc  MyDesc

the combobox is so defined:

<ComboBox
   IsEditable=True
   DisplayMemberPath="Key"
   SelectedValuePath="Key"
   ItemsSource="{Binding Path=MyList开发者_StackOverflow中文版, Mode=OneWay}" />

Now I have this problem...

If I type a character on empty editable textbox of combobox, the first element that "startswith" the typed character is matched. So, If I type "C", the selecteditem is the element "C0001"...and I would avoid this!

I would a different search logic that find the selecteditem based on full text typed. In this way:

Text Typed        SelectedItem
C                 null
C0                null
C00               null
C000              null
C0001             [C0001, myDesc, myDesc] OK!

Is possible? How can I do?

This behaviour has always been like this for Combos in Windows. If you want to do something like this, you're probably better off with a search field and a pickable list of results.

Alternatively, the TextBox does support different AutoComplete suggestion modes, but you want a dropdown too I'd imagine. (no, it doesn't).

This post makes a stab at coupling the two up, it's pretty neat.