Questions about the AutoComplete "Extender"

Questions about the AutoComplete "Extender"


Hi,
I hope someone from you can help me.
I try to work with the AutoComplete UI Feature and dynamic data.
I work with ASP.NET MVC.
My first problem is I call a JSON Method and she returned the String
"Hallo|Wert1\r\nHallo2|Wert2\r\n" (My HTTP Sniffer said)
So, the extender show only "Hallo if I type H, so how do I format the
JSON Result that the extender shows not the quotes and show both
Hallo's and not only the first one?
My second question is how do I react one the event if somebody
selected one of the items with mouse or Enter button, because I want
then execute a JS function that enable me a second select box and do
some other stuff.
The third and last question is, how can I make safe that the user
selects one of the items and don't write crap into the box?
I realy realy hope that someone can help me on one or more of my
questions.
Best regards
Christian