Elasticsearch. Net tutorial MVC4 Library Management System (2 ),

Elasticsearch. Net tutorial MVC4 Library Management System (2 ),

This article provides an example of creating an MVC4 Library Management System for your reference. The details are as follows:

First, the project structure:

Code related to the Model layerAs follows:
The Book. cs code is as follows:

Public class Book {[Key] [DatabaseGenerated (DatabaseGeneratedOption. identity)] public Guid Id {get; set;} [MaxLength (500)] [Display (Name = "Title")] public string Title {get; set ;} [MaxLength (5000)] [Display (Name = "Preface")] public string Foreword {get; set;} [Display (Name = "total page")] public int Pages {get; set;} [Display (Name = "Author")] public string Author {get; set ;}}

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

ViewModels:

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; }   } 

The following describes the codes of HomeController. cs and BooksController. cs:

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 = 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) {if (ModelState. isValid) {book. id = Guid. N EwGuid (); db. books. add (book); db. saveChanges (); // Add 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 = 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) {if (ModelState. isValid) {db. entry (book ). state = EntityState. modified; db. saveChanges (); ret Urn RedirectToAction ("Index");} return View (book);} public ActionResult Delete (Guid? Id) {if (id = null) {return new HttpStatusCodeResult (HttpStatusCode. badRequest);} 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 );}}

Elasticsearch helper class:
First, Elasticsearch. cs

Public class Elasticsearch {private static ElasticClient _ client; public static ElasticClient Client {get {if (_ client = null) {// connection configuration var setting = new ConnectionSettings (ElasticsearchConfiguration. connection, ElasticsearchConfiguration. defaultIndex); _ client = new ElasticClient (setting);} return _ client ;}}}

ElasticsearchConfiguration. cs class

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"; }  }  } 

SearchService. cs code:

Public class SearchService {public double MinScore {get {return 0.0005 ;}// highlight the prefix public string PreHighlightTag {get {return @ "<strong> ";}} // highlight the suffix 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);} // 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 ;}}

Views
Under the Books Folder:
Index. cshtml:

@ Model IEnumerable <Library. Web. Models. Book> @ {ViewBag. Title = "Index"; Layout = "~ /Views/Shared/_ Layout. cshtml ";}< h2> Index 
Edit. cshtml:

@ Model Library. Web. Models. Book @ {ViewBag. Title = "Edit"; Layout = "~ /Views/Shared/_ Layout. cshtml ";}< h2> Edit 
Details. cshtml:

@ Model Library. Web. Models. Book @ {ViewBag. Title = "Details"; Layout = "~ /Views/Shared/_ Layout. cshtml ";} 
Delete. cshtml:

@ Model Library. Web. Models. Book @ {ViewBag. Title = "Delete"; Layout = "~ /Views/Shared/_ Layout. cshtml ";}< h2> Delete 
Create. cshtml:

@ Model Library. Web. Models. Book @ {ViewBag. Title = "Create"; Layout = "~ /Views/Shared/_ Layout. cshtml ";}< h2> Create 
Home-> Index. cshtml

@ Model Library. web. viewModels. searchViewModel @ {ViewBag. title = "Elasticsearch ";} <div class = "jumbotron"> 
_ Layout. cshtml

<! DOCTYPE html> 
Result:


List page


Create page:


Search result page:


The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.