带有 ASP.NET MVC 的字符串搜索功能 XML 文件 [重复]

Question

我的应用程序可以在 XML 中搜索一种类型的标记，即：'title'，但没有别的。我希望用户能够在文件中搜索具有多个字段和部分字符串的任何内容...我在这里做错了什么？

型号：

using System;

namespace Andre_Kordasti___Programmeringsuppgift.Models
{
    public class BookModel
    {
        public string Author { get; set; }
        public string Title { get; set; }
        public string Genre { get; set; }
        public decimal Price { get; set; }
        public DateTime PublishDate { get; set; }
        public string Description { get; set; }
    }
}

查看：

   @model IEnumerable<Andre_Kordasti___Programmeringsuppgift.Models.BookModel>

@{
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Sök</h2>


@using (Html.BeginForm("Index", "Home", FormMethod.Get))
{
    <p>
        Författare: @Html.TextBox("author") <br /><br />
        Titel: @Html.TextBox("title") <br /><br />
        Genre: @Html.TextBox("genre") <br /><br />
        Pris: @Html.TextBox("price") <br /><br />
        Publicerad: @Html.TextBox("publishDate") <br /><br />
        Beskrivning: @Html.TextBox("description") <br /><br />

        <input class="btn btn-primary" type="submit" value="Sök" />
    </p>
}

<div id="bok">
    @foreach (var book in Model)
    {
        <p>Author: @Html.DisplayFor(m => book.Author)</p>
        <p>Title: @Html.DisplayFor(m => book.Title)</p>
        <p>Genre: @Html.DisplayFor(m => book.Genre)</p>
        <p>Price: @Html.DisplayFor(m => book.Price)</p>
        <p>Publish Date: @Html.DisplayFor(m => book.PublishDate)</p>
        <p>Description: @Html.DisplayFor(m => book.Description)</p>
        <hr />
    }
</div>

控制器：

using System;
using System.Linq;
using System.Web.Mvc;
using System.Xml.Linq;
using Andre_Kordasti___Programmeringsuppgift.Models;

namespace Andre_Kordasti___Programmeringsuppgift.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index(string author, string title, string genre, decimal? price, string description)
        {
            const string FILENAME = @"c:\users\andre\documents\visual studio 2015\Projects\Andre Kordasti - Programmeringsuppgift\Andre Kordasti - Programmeringsuppgift\DataSource\books.xml";

            XDocument doc = XDocument.Load(FILENAME);

            var books = doc.Descendants("book").Select(x => new BookModel()
            {
                Author = (string)x.Element("author"),
                Title = (string)x.Element("title"),
                Genre = (string)x.Element("genre"),
                Price = (decimal)x.Element("price"),
                PublishDate = (DateTime)x.Element("publish_date"),
                Description = (string)x.Element("description")
            });

            //if (!String.IsNullOrEmpty(searchString))
            //{
            //    books = books.Where(s => s.Author.Contains(searchString) || (s.Title.Contains(searchString)) || (s.Genre.Contains(searchString)) || (s.Description.Contains(searchString)));
            //}

            if (author != null)
            {
                books = books.Where(b => b.Author.Contains(author));
            }

            if (title != null)
            {
                books = books.Where(b => b.Title.Contains(title));
            }

            if (genre != null)
            {
                books = books.Where(b => b.Genre.Contains(genre));
            }

            if (price.HasValue)
            {
                books = books.Where(b => b.Price <= price.Value);
            }

            if (description != null)
            {
                books = books.Where(b => b.Description.Contains(description));
            }

            return View(books);
        }

        public ActionResult Fibonacci()
        {
            return View();
        }
    }
}

XML 文件：

<?xml version="1.0"?>
<catalog>
  <book id="bk101">
    <author>Gambardella, Matthew</author>
    <title>XML Developer's Guide</title>
    <genre>Computer</genre>
    <price>44.95</price>
    <publish_date>2000-10-01</publish_date>
    <description>
      An in-depth look at creating applications
      with XML.
    </description>
  </book>
  <book id="bk102">
    <author>Ralls, Kim</author>
    <title>Midnight Rain</title>
    <genre>Fantasy</genre>
    <price>5.95</price>
    <publish_date>2000-12-16</publish_date>
    <description>
      A former architect battles corporate zombies,
      an evil sorceress, and her own childhood to become queen
      of the world.
    </description>
  </book>
  <book id="bk103">
    <author>Corets, Eva</author>
    <title>Maeve Ascendant</title>
    <genre>Fantasy</genre>
    <price>5.95</price>
    <publish_date>2000-11-17</publish_date>
    <description>
      After the collapse of a nanotechnology
      society in England, the young survivors lay the
      foundation for a new society.
    </description>
  </book>
  <book id="bk104">
    <author>Corets, Eva</author>
    <title>Oberon's Legacy</title>
    <genre>Fantasy</genre>
    <price>5.95</price>
    <publish_date>2001-03-10</publish_date>
    <description>
      In post-apocalypse England, the mysterious
      agent known only as Oberon helps to create a new life
      for the inhabitants of London. Sequel to Maeve
      Ascendant.
    </description>
  </book>
  <book id="bk105">
    <author>Corets, Eva</author>
    <title>The Sundered Grail</title>
    <genre>Fantasy</genre>
    <price>5.95</price>
    <publish_date>2001-09-10</publish_date>
    <description>
      The two daughters of Maeve, half-sisters,
      battle one another for control of England. Sequel to
      Oberon's Legacy.
    </description>
  </book>
  <book id="bk106">
    <author>Randall, Cynthia</author>
    <title>Lover Birds</title>
    <genre>Romance</genre>
    <price>4.95</price>
    <publish_date>2000-09-02</publish_date>
    <description>
      When Carla meets Paul at an ornithology
      conference, tempers fly as feathers get ruffled.
    </description>
  </book>
  <book id="bk107">
    <author>Thurman, Paula</author>
    <title>Splish Splash</title>
    <genre>Romance</genre>
    <price>4.95</price>
    <publish_date>2000-11-02</publish_date>
    <description>
      A deep sea diver finds true love twenty
      thousand leagues beneath the sea.
    </description>
  </book>
  <book id="bk108">
    <author>Knorr, Stefan</author>
    <title>Creepy Crawlies</title>
    <genre>Horror</genre>
    <price>4.95</price>
    <publish_date>2000-12-06</publish_date>
    <description>
      An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.
    </description>
  </book>
  <book id="bk109">
    <author>Kress, Peter</author>
    <title>Paradox Lost</title>
    <genre>Science Fiction</genre>
    <price>6.95</price>
    <publish_date>2000-11-02</publish_date>
    <description>
      After an inadvertant trip through a Heisenberg
      Uncertainty Device, James Salway discovers the problems
      of being quantum.
    </description>
  </book>
  <book id="bk110">
    <author>O'Brien, Tim</author>
    <title>Microsoft .NET: The Programming Bible</title>
    <genre>Computer</genre>
    <price>36.95</price>
    <publish_date>2000-12-09</publish_date>
    <description>
      Microsoft's .NET initiative is explored in
      detail in this deep programmer's reference.
    </description>
  </book>
  <book id="bk111">
    <author>O'Brien, Tim</author>
    <title>MSXML3: A Comprehensive Guide</title>
    <genre>Computer</genre>
    <price>36.95</price>
    <publish_date>2000-12-01</publish_date>
    <description>
      The Microsoft MSXML3 parser is covered in
      detail, with attention to XML DOM interfaces, XSLT processing,
      SAX and more.
    </description>
  </book>
  <book id="bk112">
    <author>Galos, Mike</author>
    <title>Visual Studio 7: A Comprehensive Guide</title>
    <genre>Computer</genre>
    <price>49.95</price>
    <publish_date>2001-04-16</publish_date>
    <description>
      Microsoft Visual Studio 7 is explored in depth,
      looking at how Visual Basic, Visual C++, C#, and ASP+ are
      integrated into a comprehensive development
      environment.
    </description>
  </book>
</catalog>

我的 LINQ 语句有什么需要调整的吗？

Answer 1

您必须在 Select 之前添加 Where 子句并调用过滤器函数：

var results = doc.Descendants("book").Where(d => IsMatched(d, searchCriteria).Select(x => new BookModel()
        {
            Author = (string)x.Element("author"),
            Title = (string)x.Element("title"),
            Genre = (string)x.Element("genre"),
            Price = (decimal)x.Element("price"),
            PublishDate = (DateTime)x.Element("publish_date"),
            Description = (string)x.Element("description")
        }).ToList();

public bool IsMatched(XElement node, Dictionary<string, string> searchCriteria)
    {
        foreach (var key in criteras)
        {
            if (!node.Element(key.Key).Value.Contains(key.Value))
            {
                return false;
            }
        }
        return true;
    }

您可以使用 jquery ajax 传递 searchCriteria： JS：

var dict = {};
dict['author'] = 'authorName';

$.post('/Home/Index/', { searchCriteria: dict });

控制器：

public ActionResult Index(Dictionary<string, string> searchCriteria)

然后，将其作为 BookModel 列表传递给 View。