Tutorial zur Verwendung von Elasticsearch.Net MVC4-Buchverwaltungssystem (2)

Das Beispiel in diesem Artikel enthält das Produktions-Tutorial des MVC4-Buchverwaltungssystems als Referenz. Der spezifische Inhalt lautet wie folgt:

Der relevante Code der Modellebene lautet wie folgt:

Der Book.cs-Code lautet wie folgt:

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; } 
 }

Der relevante Code von ViewModels:

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

Der nächste Schritt ist HomeController.cs und BooksController cs-Code:

public class SearchViewModel 
 { 
 public string Query { get; set; } 
  
 public IEnumerable<IHit<Book>> Results { get; set; } 
  
 public IDictionary<string, Suggest[]> 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); 
 } 
  
 }

Elasticsearch-Hilfsklasse:

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>(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>(book); 
  } 
  return Json("OK",JsonRequestBehavior.AllowGet); 
 } 
  
 protected override void Dispose(bool disposing) 
 { 
  if (disposing) 
  { 
  db.Dispose(); 
  } 
  base.Dispose(disposing); 
 } 
 }

Zuerst ist Elasticsearch.cs

ElasticsearchConfiguration.cs-Klasse

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; 
  } 
  
 } 
 }

SearchService.cs-Code:

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"; } 
 } 
 }

Ansichtsansicht

public class SearchService 
 { 
 public double MinScore { get {return 0.0005; }} 
  
 //高亮标记前缀 
 public string PreHighlightTag 
 { 
  get { return @"<strong>"; } 
 } 
  
 //高亮标记后缀 
 public string PostHighlightTag 
 { 
  get { return @"</strong>"; } 
 } 
  
  
 public Tuple< IEnumerable<IHit<Book>>,long> Find(string query, int page = 0, int pageSize = 10) 
 { 
  var result = Elasticsearch.Elasticsearch.Client.Search<Book>(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<IEnumerable<IHit<Book>>, long>(result.Hits,result.ElapsedMilliseconds); 
 } 
  
 //查找短语建议 
 public IDictionary<string, Suggest[]> FindPhraseSuggestion(string phrase, int page = 0, int pageSize = 5) 
 { 
  var result = Elasticsearch.Elasticsearch.Client.Search<Book>(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<IHit<Book>> FindAll() 
 { 
  var result = Elasticsearch.Elasticsearch.Client.Search<Book>(s => s.AllIndices()); 
  return result.Hits; 
 } 
  
 }

Bücherordner:

Index.cshtml:

Edit.cshtml:

@model IEnumerable<Library.Web.Models.Book> 
  
@{ 
 ViewBag.Title = "Index"; 
 Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
  
<h2>Index</h2> 
  
<p> 
 @Html.ActionLink("创建新书", "Create") 
</p> 
<table class="table"> 
 <tr> 
 <th> 
  @Html.DisplayNameFor(model => model.Title) 
 </th> 
 <th> 
  @Html.DisplayNameFor(model => model.Foreword) 
 </th> 
 <th> 
  @Html.DisplayNameFor(model => model.Pages) 
 </th> 
 <th> 
  @Html.DisplayNameFor(model => model.Author) 
 </th> 
 <th></th> 
 </tr> 
  
@foreach (var item in Model) { 
 <tr> 
 <td> 
  @Html.DisplayFor(modelItem => item.Title) 
 </td> 
 <td> 
  @Html.DisplayFor(modelItem => item.Foreword) 
 </td> 
 <td> 
  @Html.DisplayFor(modelItem => item.Pages) 
 </td> 
 <td> 
  @Html.DisplayFor(modelItem => item.Author) 
 </td> 
 <td> 
  @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 }) 
 </td> 
 </tr> 
} 
  
</table>

Details.cshtml:

@model Library.Web.Models.Book 
  
@{ 
 ViewBag.Title = "Edit"; 
 Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
  
<h2>Edit</h2> 
  
  
@using (Html.BeginForm()) 
{ 
 @Html.AntiForgeryToken() 
  
 <div class="form-horizontal"> 
 <h4>Book</h4> 
 <hr /> 
 @Html.ValidationSummary(true) 
 @Html.HiddenFor(model => model.Id) 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Title, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Title) 
  @Html.ValidationMessageFor(model => model.Title) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Foreword, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.TextAreaFor(model => model.Foreword) 
  @Html.ValidationMessageFor(model => model.Foreword) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Pages, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Pages) 
  @Html.ValidationMessageFor(model => model.Pages) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Author, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Author) 
  @Html.ValidationMessageFor(model => model.Author) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  <div class="col-md-offset-2 col-md-10"> 
  <input type="submit" value="Save" class="btn btn-default" /> 
  </div> 
 </div> 
 </div> 
} 
  
<div> 
 @Html.ActionLink("返回列表", "Index") 
</div> 
  
@section Scripts { 
 @Scripts.Render("~/bundles/jqueryval") 
}

Delete.cshtml:

@model Library.Web.Models.Book 
  
@{ 
 ViewBag.Title = "Details"; 
 Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
  
<h2>Details</h2> 
  
<div> 
 <h4>Book</h4> 
 <hr /> 
 <dl class="dl-horizontal"> 
 <dt> 
  @Html.DisplayNameFor(model => model.Title) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Title) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Foreword) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Foreword) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Pages) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Pages) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Author) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Author) 
 </dd> 
  
 </dl> 
</div> 
<p> 
 @Html.ActionLink("编辑", "Edit", new { id = Model.Id }) | 
 @Html.ActionLink("返回列表", "Index") 
</p>

Create.cshtml:

@model Library.Web.Models.Book 
  
@{ 
 ViewBag.Title = "Delete"; 
 Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
  
<h2>Delete</h2> 
  
<h3>Are you sure you want to delete this?</h3> 
<div> 
 <h4>Book</h4> 
 <hr /> 
 <dl class="dl-horizontal"> 
 <dt> 
  @Html.DisplayNameFor(model => model.Title) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Title) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Foreword) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Foreword) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Pages) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Pages) 
 </dd> 
  
 <dt> 
  @Html.DisplayNameFor(model => model.Author) 
 </dt> 
  
 <dd> 
  @Html.DisplayFor(model => model.Author) 
 </dd> 
  
 </dl> 
  
 @using (Html.BeginForm()) { 
 @Html.AntiForgeryToken() 
  
 <div class="form-actions no-color"> 
  <input type="submit" value="Delete" class="btn btn-default" /> | 
  @Html.ActionLink("返回列表", "Index") 
 </div> 
 } 
</div>

Home->Index.cshtml

@model Library.Web.Models.Book 
  
@{ 
 ViewBag.Title = "Create"; 
 Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
  
<h2>创建</h2> 
  
  
@using (Html.BeginForm()) 
{ 
 @Html.AntiForgeryToken() 
  
 <div class="form-horizontal"> 
 <h4>Book</h4> 
 <hr /> 
 @Html.ValidationSummary(true) 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Title, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Title) 
  @Html.ValidationMessageFor(model => model.Title) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Foreword, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.TextAreaFor(model => model.Foreword) 
  @Html.ValidationMessageFor(model => model.Foreword) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Pages, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Pages) 
  @Html.ValidationMessageFor(model => model.Pages) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  @Html.LabelFor(model => model.Author, new { @class = "control-label col-md-2" }) 
  <div class="col-md-10"> 
  @Html.EditorFor(model => model.Author) 
  @Html.ValidationMessageFor(model => model.Author) 
  </div> 
 </div> 
  
 <div class="form-group"> 
  <div class="col-md-offset-2 col-md-10"> 
  <input type="submit" value="创建" class="btn btn-default" /> 
  </div> 
 </div> 
 </div> 
} 
  
<div> 
 @Html.ActionLink("回到列表", "Index") 
</div> 
  
@section Scripts { 
 @Scripts.Render("~/bundles/jqueryval") 
}

_Layout.cshtml

@model Library.Web.ViewModels.SearchViewModel 
@{ 
 ViewBag.Title = "Elasticsearch"; 
} 
  
<div class="jumbotron"> 
 <h1>Elasticsearch入门</h1> 
 <p class="lead">安装和配置群集</p> 
 <ol> 
 <li> 
  <a href="http://www.oracle.com/technetwork/java/ 
javase/downloads/index.html">安装Java</a> 
 </li> 
 <li> 
  <a href="http://www.elasticsearch.org/ 
download/">安装Elasticsearch</a> 
 </li> 
 <li>运行Elasticsearch</li> 
 <li><a href="/Books/Create">增加一些书籍</a></li> 
 </ol> 
</div> 
  
  
@if (Model == null) 
{ 
 return; 
} 
<div style="margin-top: 30px;"> 
 @if (Model.Suggestions.Any(x => x.Key == "did-you-mean")) 
 { 
 <span>你的意思是: </span> 
 foreach (var suggestions in Model.Suggestions["did-you-mean"]) 
 { 
  var count = 0; 
  foreach (var suggestion in suggestions.Options) 
  { 
  <a href="/Home/Search?query=@suggestion.Text"><strong>@suggestion.Text </strong> </a> 
  count++; 
  } 
  if (count == 0) 
  { 
  <span class="alert-danger">没有建议！</span> 
  } 
  
 } 
 } 
</div> 
  
<h3><strong>Results for:</strong> @Model.Query</h3> 
  
@if (Model != null) 
{ 
 <table class="table table-condensed"> 
 <thead> 
  <tr><th>文档的分数(排名相关度)</th><th>Title</th><th>Content</th><th>Author</th></tr> 
 </thead> 
  
 <tbody> 
  @foreach (var result in Model.Results) 
  { 
  <tr> 
   <td>@result.Score</td> 
   <td> 
   <a href="/Books/Details/@result.Id"> 
    @if (result.Highlights != null && result.Highlights.Any(x => x.Key == "title")) 
    { 
    var hl = result.Highlights.FirstOrDefault(x => x.Key == "title"); 
    foreach (var h in hl.Value.Highlights) 
    { 
     WriteLiteral(h); 
    } 
    } 
    else 
    { 
    WriteLiteral(result.Source.Title); 
    } 
   </a> 
   </td> 
  
   <td> 
   @if (result.Highlights != null && result.Highlights.Any(x => x.Key == "foreword")) 
   { 
    var hl = result.Highlights.FirstOrDefault(x => x.Key == "foreword"); 
    foreach (var h in hl.Value.Highlights) 
    { 
    WriteLiteral(h + "..."); 
    } 
   } 
  
   </td> 
  
   <td>@result.Source.Author</td> 
  </tr> 
  
  } 
  @if (!Model.Results.Any()) 
  { 
  <tr> 
   <td colspan="4" class="alert alert-danger" style="text-align:center;">没有结果发现:(</td> 
  </tr> 
  } 
 </tbody> 
  
 </table> 
 <h4><span class="label label-default">@Model.Results.Count()</span>搜索结果用了 @Model.Elapsed 毫秒</h4> 
}

Das Ergebnis ist wie in der Abbildung dargestellt:

<!DOCTYPE html> 
<html> 
<head> 
 <meta charset="utf-8" /> 
 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 
 <title>@ViewBag.Title</title> 
 @Styles.Render("~/Content/css") 
 @Scripts.Render("~/bundles/modernizr") 
  
</head> 
<body> 
 <div class="navbar navbar-inverse navbar-fixed-top"> 
 <div class="container"> 
  <div class="navbar-header"> 
  <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse"> 
   <span class="icon-bar"></span> 
   <span class="icon-bar"></span> 
   <span class="icon-bar"></span> 
  </button> 
  @Html.ActionLink("Elasticsearch MVC示例", "Index", "Home", null, new { @class = "navbar-brand" }) 
  </div> 
  <div class="navbar-collapse collapse"> 
  <ul class="nav navbar-nav"> 
   <li>@Html.ActionLink("Home", "Index", "Home")</li> 
   <li>@Html.ActionLink("Books", "Index", "Books")</li> 
  </ul> 
  
  
  @using (Html.BeginForm("Search", "Home", FormMethod.Get,new {@class = "navbar-form navbar-left"})) 
  { 
   <div class="form-group"> 
   <input class="form-control" type="text" placeholder="搜索" name="query" /> 
   </div> 
   <button type="submit" class="btn btn-default">提交</button> 
  } 
  
  
  
  </div> 
  
 </div> 
 </div> 
 <div class="container body-content"> 
 @RenderBody() 
 <hr /> 
 <footer> 
  <p>© @DateTime.Now.Year - Elasticsearch, Nest, ASP.NET 应用</p> 
 </footer> 
 </div> 
  
 @Scripts.Render("~/bundles/jquery") 
 @Scripts.Render("~/bundles/bootstrap") 
 @RenderSection("scripts", required: false) 
</body> 
</html>

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