Elasticsearch.Net使用教程 MVC4图书管理系统（2）_实用技巧_

 public class Book { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public Guid Id { get; set; } [MaxLength(500)] [Display(Name = "标题")] public string Title { get; set; } [MaxLength(5000)] [Display(Name = "前言")] public string Foreword { get; set; } [Display(Name = "总页数")] public int Pages { get; set; } [Display(Name = "作者")] public string Author { get; set; } } 

 public class AppContext:DbContext { public AppContext() { } public DbSet Books { get; set; } } 

 public class SearchViewModel { public string Query { get; set; } public IEnumerable> Results { get; set; } public IDictionary Suggestions { get; set; } public long Elapsed { get; set; } } 

 public class HomeController : Controller { private SearchService _searchService; public HomeController() { _searchService = new SearchService(); } public ActionResult Index() { return View(); } public ActionResult Search(string query, int page = 0, int pageSize = 10) { var result = _searchService.Find(query, page, pageSize); var suggestion = _searchService.FindPhraseSuggestion(query, 0, 3); var viewModel = new SearchViewModel { Query = query, Results = result.Item1,Elapsed = result.Item2, Suggestions = suggestion }; return View("Index", viewModel); } } 

 public class BooksController : Controller { private AppContext db = new AppContext(); public ActionResult Index() { return View(db.Books.ToList()); } public ActionResult Details(Guid? id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } Book book = db.Books.Find(id); if (book == null) { return HttpNotFound(); } return View(book); } public ActionResult Create() { return View(); } [HttpPost] [ValidateAntiForgeryToken] public ActionResult Create([Bind(Include="Id,Title,Foreword,Pages,Author")] Book book) { if (ModelState.IsValid) { book.Id = Guid.NewGuid(); db.Books.Add(book); db.SaveChanges(); //添加书 Elasticsearch.Elasticsearch.Client.Index(book); return RedirectToAction("Index"); } return View(book); } public ActionResult Edit(Guid? id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } Book book = db.Books.Find(id); if (book == null) { return HttpNotFound(); } return View(book); } [HttpPost] [ValidateAntiForgeryToken] public ActionResult Edit([Bind(Include="Id,Title,Foreword,Pages,Author")] Book book) { if (ModelState.IsValid) { db.Entry(book).State = EntityState.Modified; db.SaveChanges(); return RedirectToAction("Index"); } return View(book); } public ActionResult Delete(Guid? id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest); } Book book = db.Books.Find(id); if (book == null) { return HttpNotFound(); } return View(book); } [HttpPost, ActionName("Delete")] [ValidateAntiForgeryToken] public ActionResult DeleteConfirmed(Guid id) { Book book = db.Books.Find(id); db.Books.Remove(book); db.SaveChanges(); return RedirectToAction("Index"); } public JsonResult Reindex() { foreach (var book in db.Books) { //Indexing book Elasticsearch.Elasticsearch.Client.Index(book); } return Json("OK",JsonRequestBehavior.AllowGet); } protected override void Dispose(bool disposing) { if (disposing) { db.Dispose(); } base.Dispose(disposing); } } 

 public class Elasticsearch { private static ElasticClient _client; public static ElasticClient Client { get { if (_client == null) { //连接配置 var setting = new ConnectionSettings(ElasticsearchConfiguration.Connection,ElasticsearchConfiguration.DefaultIndex); _client = new ElasticClient(setting); } return _client; } } } 

 public static class ElasticsearchConfiguration { public static string Host { get { return "http://localhost"; } } public static long Port { get { return 9200; } } public static Uri Connection { get { return new Uri(string.Format("{0}:{1}", Host, Port)); } } public static string DefaultIndex { get { return "library"; } } } 

 public class SearchService { public double MinScore { get {return 0.0005; }} //高亮标记前缀 public string PreHighlightTag { get { return @""; } } //高亮标记后缀 public string PostHighlightTag { get { return @""; } } public Tuple< IEnumerable>,long> Find(string query, int page = 0, int pageSize = 10) { var result = Elasticsearch.Elasticsearch.Client.Search(s => s .From(page * pageSize) .Size(pageSize) .MinScore(MinScore) .Highlight(h => h .PreTags(PreHighlightTag) .PostTags(PostHighlightTag) .OnFields( f => f.OnField(b => b.Foreword), f => f.OnField(b => b.Title) )) .Query(q => q.QueryString(qs => qs.Query(query).UseDisMax()))); return new Tuple>, long>(result.Hits,result.ElapsedMilliseconds); } //查找短语建议 public IDictionary FindPhraseSuggestion(string phrase, int page = 0, int pageSize = 5) { var result = Elasticsearch.Elasticsearch.Client.Search(s => s .From(page*pageSize) .Size(pageSize) .SuggestPhrase("did-you-mean", ps => ps .Text(phrase) .OnField(f => f.Foreword)) .Query(q => q.MatchAll())); return result.Suggest; } public IEnumerable> FindAll() { var result = Elasticsearch.Elasticsearch.Client.Search(s => s.AllIndices()); return result.Hits; } } 

 @model IEnumerable @{ ViewBag.Title = "Index"; Layout = "~/Views/Shared/_Layout.cshtml"; } 
Index
 @Html.ActionLink("创建新书", "Create") 
 @foreach (var item in Model) {  } 
 @Html.DisplayNameFor(model => model.Title) 
 @Html.DisplayNameFor(model => model.Foreword) 
 @Html.DisplayNameFor(model => model.Pages) 
 @Html.DisplayNameFor(model => model.Author) 
 @Html.DisplayFor(modelItem => item.Title) 
 @Html.DisplayFor(modelItem => item.Foreword) 
 @Html.DisplayFor(modelItem => item.Pages) 
 @Html.DisplayFor(modelItem => item.Author) 
 @Html.ActionLink("编辑", "Edit", new { id=item.Id }) | @Html.ActionLink("详细", "Details", new { id=item.Id }) | @Html.ActionLink("删除", "Delete", new { id=item.Id }) 

 @model Library.Web.Models.Book @{ ViewBag.Title = "Edit"; Layout = "~/Views/Shared/_Layout.cshtml"; } 
Edit
 @using (Html.BeginForm()) { @Html.AntiForgeryToken() 
Book
 @Html.ValidationSummary(true) @Html.HiddenFor(model => model.Id) 
 @Html.LabelFor(model => model.Title, new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(model => model.Title) @Html.ValidationMessageFor(model => model.Title) 
 @Html.LabelFor(model => model.Foreword, new { @class = "control-label col-md-2" }) 
 @Html.TextAreaFor(model => model.Foreword) @Html.ValidationMessageFor(model => model.Foreword) 
 @Html.LabelFor(model => model.Pages, new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(model => model.Pages) @Html.ValidationMessageFor(model => model.Pages) 
 @Html.LabelFor(model => model.Author, new { @class = "control-label col-md-2" }) 
 @Html.EditorFor(model => model.Author) @Html.ValidationMessageFor(model => model.Author) 
 } 
 @Html.ActionLink("返回列表", "Index") 
 @section Scripts { @Scripts.Render("~/bundles/jqueryval") } 

 @model Library.Web.Models.Book @{ ViewBag.Title = "Details"; Layout = "~/Views/Shared/_Layout.cshtml"; } 
Details
Book
 @Html.DisplayNameFor(model => model.Title) 
 @Html.DisplayFor(model => model.Title) 
 @Html.DisplayNameFor(model => model.Foreword) 
 @Html.DisplayFor(model => model.Foreword) 
 @Html.DisplayNameFor(model => model.Pages) 
 @Html.DisplayFor(model => model.Pages) 
 @Html.DisplayNameFor(model => model.Author) 
 @Html.DisplayFor(model => model.Author) 
 @Html.ActionLink("编辑", "Edit", new { id = Model.Id }) | @Html.ActionLink("返回列表", "Index") 

 @model Library.Web.Models.Book @{ ViewBag.Title = "Delete"; Layout = "~/Views/Shared/_Layout.cshtml"; } 
Delete
Are you sure you want to delete this?
Book
 @Html.DisplayNameFor(model => model.Title) 
 @Html.DisplayFor(model => model.Title) 
 @Html.DisplayNameFor(model => model.Foreword) 
 @Html.DisplayFor(model => model.Foreword) 
 @Html.DisplayNameFor(model => model.Pages) 
 @Html.DisplayFor(model => model.Pages) 
 @Html.Displ
                
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