问题:

I want to implement a custom TextBox that will allow me to edit tags. Hotmail's "To" TextBox is the best example I can think of:

Also Facebook's "To" implements the same concept:

Oh yeah, and StackOverflow does it too to tag a question :)

Does anyone have some experience in building something like that in WPF? What would be the first steps that I should make?

回答1:

I believe this Tokenizing control does most of what you're looking for:

http://blog.pixelingene.com/2010/10/tokenizing-control-convert-text-to-tokens/

I'd try the following:

implement a TagEditor, which has the functionality to edit a single Tag (based on an AutoComplete TextBox that is swapped with a TextBlock once an existing Tag has been recognized or editing is ended)
create an DataTemplate that uses the TagEditor
create an ItemsControl that utilizes the DataTemplate

that breaks it down to three challenges, of which only the first is a bit tricky, but solveable with the given keywords and stackoverflow ;-)