Auto complete is not working in my asp.net MVC - asp.net-mvc-3

Question

i have the following repository method to search for users containing a search parameter:-
public IEnumerable<User> searchusers2(string q)
{
return from u in entities1.Users
where (u.UserID.Contains(q) || string.IsNullOrEmpty(q))
select u;
}
which is called suing the following action method:-
public ActionResult QuickSearch(string term)
{
var users = r.searchusers2(term);
users.Select(a => new { value = a.UserID });
return Json(users, JsonRequestBehavior.AllowGet);
}
and on the view i have the following code:-
#using (Ajax.BeginForm("Search", "User", new AjaxOptions
{
HttpMethod = "POST",
InsertionMode = InsertionMode.Replace,
UpdateTargetId = "searchResults",
LoadingElementId = "progress"
}))
{
<input type="text" name="q" data-autocomplete-source="#Url.Action("QuickSearch", "User")" />
<input type="hidden" name="classid" value="#ViewBag.classid"/>
<input type="submit" value="Search" />
}
the above code is not working but if i change my action method to be as follow (without using a repository to perform the search) then the auto complete will work fine,,, so what might be causing this problem:-
public ActionResult QuickSearch(string term)
{
var users = entities1.Users
.Where(e => e.UserID.Contains(term))
.Select(r => new {value = r.UserID });
return Json(users, JsonRequestBehavior.AllowGet);
}

Answer 1

In the repository-version you're returning the whole User object in Json, The Select in
public ActionResult QuickSearch(string term)
{
var users = r.searchusers2(term);
users.Select(a => new { value = a.UserID });
return Json(users, JsonRequestBehavior.AllowGet);
}
is doing nothing because you're not storing the returned values, you'll either need to chain the call together, e.g:
public ActionResult QuickSearch(string term)
{
var users = r.searchusers2(term).Select(a => new { value = a.UserID });
return Json(users, JsonRequestBehavior.AllowGet);
}
or use a separate variable:
public ActionResult QuickSearch(string term)
{
var users = r.searchusers2(term);
var values = users.Select(a => new { value = a.UserID });
return Json(values, JsonRequestBehavior.AllowGet);
}