主要的CSS文件和核心的JQuery文件被留下来了，因为css在每个也都需要，并且绝大多数网页也需要JQuery。然而新的JQuery文件和不唐突的AJAX不是每个页面都需要的。
现在，有两种方式使用Autocomplete 插件：
1.在javascript中设置要搜索的数据。
2.当用户输入时通过ajax检索。
在我使用这个插件的经验看来，我发现使用解决方案1时自动完成更快。因为它并不需要每次从数据库中请求数据。然而，使用这种解决方案的限制：只有这么多字符，可传递到function中，大量的JavaScript可能会导致用户的计算机上页面加载缓慢。经过一些试验和错误，我已经确定神奇的数字是大约40,000个结果。如果结果数量超过此，最好使用选项2;否则，始终坚持，因为搜索选项1是瞬时，而不是有轻微的延迟。
在这个例子中，将搜索书籍，我们没有超过40000，所以将使用选项1。BooksController现在必须更新，以设置ViewBag为book title。自动完成功能需要支持一个JavaScript数组的支持，所以书将管道（|）分开。然后在view中，书将被转换到一个数组，使用JavaScript的split（）函数。当用户完成键入他们的结果，他们应该有选择完全匹配标题，因此这个函数将被更新。如果只有1本书返回并且用户执行了搜索，它会自动重定向到本书详细介绍页面。
我们要在bookcontroller 中更新Index Action 并添加一个私有方法名为：FormatBooksForAutocomplete。
代码如下：
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Linq.Dynamic;
using System.Web;
using System.Web.Mvc;
using MvcApplication.Models;
using MvcApplication.Utils;
using PagedList;
namespace MvcApplication.Controllers
{
public class BooksController : Controller
{
private BookDBContext db = new BookDBContext();
//
// GET: /Books/
[OutputCache(Duration = Int32.MaxValue, SqlDependency = "MvcApplication.Models.BookDBContext:books", VaryByParam = "sortOrder;filter;page")]
public ActionResult Index(string sortOrder, string filter, string Keyword, int page = 1)
{
#region ViewBag Resources
ViewBag.Title = Resources.Resource1.BookIndexTitle;
ViewBag.CreateLink = Resources.Resource1.CreateLink;
ViewBag.TitleDisplay = Resources.Resource1.TitleDisplay;
ViewBag.IsbnDisplay = Resources.Resource1.IsbnDisplay;
ViewBag.SummaryDisplay = Resources.Resource1.SummaryDisplay;
ViewBag.AuthorDisplay = Resources.Resource1.AuthorDisplay;
ViewBag.ThumbnailDisplay = Resources.Resource1.ThumbnailDisplay;
ViewBag.PriceDisplay = Resources.Resource1.PriceDisplay;
ViewBag.PublishedDisplay = Resources.Resource1.PublishedDisplay;
ViewBag.EditLink = Resources.Resource1.EditLink;
ViewBag.DetailsLink = Resources.Resource1.DetailsLink;
ViewBag.DeleteLink = Resources.Resource1.DeleteLink;
#endregion
#region ViewBag Sort Params
ViewBag.TitleSortParam = (sortOrder == "Title") ? "Title desc" : "Title";
ViewBag.IsbnSortParam = (sortOrder == "Isbn") ? "Isbn desc" : "Isbn";
ViewBag.AuthorSortParam = (sortOrder == "Author") ? "Author desc" : "Author";
ViewBag.PriceSortParam = (sortOrder == "Price") ? "Price desc" : "Price";
ViewBag.PublishedSortParam = (String.IsNullOrEmpty(sortOrder)) ? "Published desc" : "";
// Default the sort order
if (String.IsNullOrEmpty(sortOrder))
{
sortOrder = "Published desc";
}
ViewBag.CurrentSortOrder = sortOrder;
#endregion
var books = from b in db.Books select b;
#region Keyword Search
if (!String.IsNullOrEmpty(Keyword))
{
books = books.Where(b => b.Title.ToUpper().Contains(Keyword.ToUpper()) || b.Author.ToUpper().Contains(Keyword.ToUpper()));
// Should we redirect because of only one result?
if (books.Count() == 1)
{
Book book = books.First();
return RedirectToAction("Details", new { id = book.ID });
}
}
ViewBag.CurrentKeyword = String.IsNullOrEmpty(Keyword) ? "" : Keyword;
#endregion
#region Filter switch
switch (filter)
{
case "NewReleases":
var startDate = DateTime.Today.AddDays(-14);
books = books.Where(b => b.Published <= DateTime.Today.Date
&& b.Published >= startDate
);
break;
case "ComingSoon":
books = books.Where(b => b.Published > DateTime.Today.Date);
break;
default:
// No filter needed
break;
}
ViewBag.CurrentFilter = String.IsNullOrEmpty(filter) ? "" : filter;
#endregion
books = books.OrderBy(sortOrder);
int maxRecords = 1;
int currentPage = page - 1;
// Get all book titles
ViewBag.BookTitles = FormatBooksForAutocomplete();
return View(books.ToPagedList(currentPage, maxRecords));
}
private string FormatBooksForAutocomplete()
{
string bookTitles = String.Empty;
var books = from b in db.Books select b;
foreach (Book book in books)
{
if (bookTitles.Length > 0)
{
bookTitles += "|";
}
bookTitles += book.Title;
}
return bookTitles;
}
//
// GET: /Books/Details/5
public ActionResult Details(int id = 0, string bookTitle = "")
{
Book book = db.Books.Find(id);
return View(book);
}
//
// GET: /Books/Create
public ActionResult Create()
{
return View();
}
//
// POST: /Books/Create
[HttpPost]
public ActionResult Create(Book book, HttpPostedFileBase file)
{
if (ModelState.IsValid)
{
// Upload our file
book.Thumbnail = FileUpload.UploadFile(file);
db.Books.Add(book);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(book);
}
//
// GET: /Books/Edit/5
public ActionResult Edit(int id)
{
Book book = db.Books.Find(id);
return View(book);
}
//
// POST: /Books/Edit/5
[HttpPost]
public ActionResult Edit(Book book, HttpPostedFileBase file)
{
if (ModelState.IsValid)
{
// Delete old file
FileUpload.DeleteFile(book.Thumbnail);
// Upload our file
book.Thumbnail = FileUpload.UploadFile(file);
db.Entry(book).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
return View(book);
}
//
// GET: /Books/Delete/5
public ActionResult Delete(int id)
{
Book book = db.Books.Find(id);
return View(book);
}
//
// POST: /Books/Delete/5
[HttpPost, ActionName("Delete")]
public ActionResult DeleteConfirmed(int id)
{
Book book = db.Books.Find(id);
// Delete old file
FileUpload.DeleteFile(book.Thumbnail);
db.Books.Remove(book);
db.SaveChanges();
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
db.Dispose();
base.Dispose(disposing);
}
}
}最后book/index view需要更新去初始化jQuery的自动完成。要做的第一件事是使用@节标记，包括必要的JavaScript和CSS文件。接下来，以前创建的搜索文本框更新设置一个键的IDwordSearch。
最后，JavaScript代码添加在视图的底部去在搜索文本框上建立自动完成功能。此JavaScript是有意添加在view的底部，以确保完全呈现给用户，因为在用户的电脑上建立数据是一项工作，Javascript处理可能会“堵塞”页面加载。
（译者：先呈现数据再执行javascript，js不是像传统那样放在head标签里）
这取决于结果的数量。代码如下：
@model PagedList.IPagedList
@if (IsAjax)
{
Layout = null;
}
@section JavascriptAndCSS {
}
@MvcApplication4.Resources.Resource1.BookIndexTitle
@Html.ActionLink("Create New", "Create")
Show:
@if (ViewBag.CurrentFilter != "")
{
@Ajax.ActionLink("All", "Index", new { sortOrder = ViewBag.CurrentSortOrder, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
}
else
{
@:All
}
|
@if (ViewBag.CurrentFilter != "NewReleases")
{
@Ajax.ActionLink("New Releases", "Index", new { filter = "NewReleases", sortOrder = ViewBag.CurrentSortOrder, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
}
else
{
@:New Releases
}
|
@if (ViewBag.CurrentFilter != "ComingSoon")
{
@Ajax.ActionLink("Coming Soon", "Index", new { filter = "ComingSoon", sortOrder = ViewBag.CurrentSortOrder, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
}
else
{
@:Coming Soon
}
@using (Html.BeginForm())
{
@:Search: @Html.TextBox("Keyword", (string)ViewBag.CurrentKeyword, new { id = "KeywordSearch" })
}
@Html.Partial("_Paging")
|
@Ajax.ActionLink("Title", "Index", new { sortOrder = ViewBag.TitleSortParam, filter = ViewBag.CurrentFilter, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
|
@Ajax.ActionLink("Isbn", "Index", new { sortOrder = ViewBag.IsbnSortParam, filter = ViewBag.CurrentFilter, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
|
Summary
|
@Ajax.ActionLink("Author", "Index", new { sortOrder = ViewBag.AuthorSortParam, filter = ViewBag.CurrentFilter, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
|
Thumbnail
|
@Ajax.ActionLink("Price", "Index", new { sortOrder = ViewBag.PriceSortParam, filter = ViewBag.CurrentFilter, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
|
@Ajax.ActionLink("Published", "Index", new { sortOrder = ViewBag.PublishedSortParam, filter = ViewBag.CurrentFilter, Keyword = ViewBag.CurrentKeyword }, new AjaxOptions { UpdateTargetId = "main" })
|
|
@foreach (var item in Model)
{
|
@Html.DisplayFor(modelItem => item.Title)
|
@Html.DisplayFor(modelItem => item.Isbn)
|
@Html.DisplayFor(modelItem => item.Summary)
|
@Html.DisplayFor(modelItem => item.Author)
|
@Html.DisplayFor(modelItem => item.Thumbnail)
|
@Html.DisplayFor(modelItem => item.Price)
|
@Html.DisplayFor(modelItem => item.Published)
|
@Html.ActionLink("Edit", "Edit", new { id = item.ID }) |
@Html.ActionLink("Details", "Details", new { id = item.ID }) |
@Html.ActionLink("Delete", "Delete", new { id = item.ID })
|
}
@Html.Partial("_Paging")
$(document).ready(function () {
var data = "@ViewBag.BookTitles".split("|");
$("#KeywordSearch").autocomplete(data);
});
为了实施选项2，一个Ajax搜索，而不是传递数据数组到自动完成函数，您可以传递一个URL。URL将需要接受查询字符串变量：q。这包含用户输入的搜索值。这将用于执行书本上包含部分匹配的搜索，并返回以分隔符分隔的字符串。JQuery文档中含有较多的这样的成品例子，也有其他的例子，去更新的输出结果（可能包括书的封面的缩略图）。
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文章题目：如何使用JQuery自动完成插件AutoComplete
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