Question

以下是我的家庭控制器的操作方法索引，它从名为AllMovies的SQL Server数据库视图中获取数据。

using Skylink.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using PagedList;


namespace Skylink.Controllers
{
    public class HomeController : Controller
        {
    public ActionResult Index(string sortOrder, string currentFilter, string searchString, int? page)
    {
        ViewBag.CurrentSort = sortOrder;
        ViewBag.NameSortParm = String.IsNullOrEmpty(sortOrder) ? "name_desc" : "";
        ViewBag.DateSortParm = sortOrder == "Date" ? "date_desc" : "Date";

        if (searchString != null)
        {
            page = 1;
        }
        else
        {
            searchString = currentFilter;
        }

        ViewBag.CurrentFilter = searchString;

        MovieContext movieContext = new MovieContext();
        var movies = from m in movieContext.Movies1.ToList()
                         select m;

        if (!String.IsNullOrEmpty(searchString))
        {
            movies = movies.Where(s => s.Title.Contains(searchString)
                                   || s.Title.Contains(searchString));
        }

        switch (sortOrder)
        {
            case "name_desc":
                movies = movies.OrderByDescending(s => s.Title);
                break;
            case "date":
                movies = movies.OrderBy(s => s.Print);
                break;
            default:
                movies = movies.OrderByDescending(s => s.DateAdd);
                break;

        }

        int pageSize = 24;
        int pageNumber = (page ?? 1);
        return View(movies.ToPagedList(pageNumber, pageSize));

    }

以下是上述操作结果返回的索引视图（Razor）的cshtml。

@using Skylink.Models;

@model PagedList.IPagedList<Skylink.Models.Movie1>
@using PagedList.Mvc;
<link href="~/Content/PagedList.css" rel="stylesheet" type="text/css" />

@{ViewBag.Title = "Recently Added";
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>@ViewBag.Title</title>
<link href="@Url.Content("~/StyleSheet4.css")" rel="stylesheet" type="text/css" />
<script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")"></script>
<script src="@Url.Content("~/Scripts/modernizr-1.7.min.js")"></script>
</head>
<body>

<div>
    <br />
    Page @(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber) of    @Model.PageCount

    @Html.PagedListPager(Model, page => Url.Action("Index",
new { page, sortOrder = ViewBag.CurrentSort, currentFilter = ViewBag.CurrentFilter }))
</div>

@using (Html.BeginForm("Index", "Home", FormMethod.Get))

{
    <p>
    Find by name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as string)
    <input type="submit" value="Search" />
</p>
}

    @foreach (var item in Model)
{
    <div class="img">

        <a href="@Url.Action("Details","Home", new { id = item.Id })"><img src="@Url.Content(@item.ImageUrl)" alt="Image Not Available" /></a>
        <div class="desc" style="font-family:Arial;font-size:x-small;  color:white">@Html.DisplayFor(model => item.Title)</div>
        <div class="desc" style="font-family:Arial;font-size:xx-small; color:yellow">IMDB: @Html.DisplayFor(model => item.Rating)</div>
        <div class="desc" style="font-family:Arial;font-size:xx-small; color:white">@Html.DisplayFor(model => item.Print)</div>
        </div>

}
</body>
</html>

一切正常，但运行时的搜索字符串与案例不匹配，例如我有一个电影名称“Ted”但是当我在搜索文本框中键入“ted”时，我没有得到任何结果。我必须输入完全“泰德”才能找到这部电影。我只需输入“ted”并获得结果。

希望我详细解释了我的问题。

Answer 1

为什么不使用ToLower进行比较？

switch (sortOrder.ToLower()) {
    case "name_desc":
        movies =  movies.OrderByDescending(s => s.Title);
        break;
    case "date":
        movies = movies.OrderBy(s => s.Print);
        break;
    default:
        movies = movies.OrderByDescending(s => s.DateAdd);
        break;
}

或者，您可以使用：

string.Equals(a, b, StringComparison.CurrentCultureIgnoreCase);

顺便说一句，使用==进行字符串相等性评估错误。它检查参考平等，而不是词汇平等。您需要使用Equals。有关原因，请参阅this回答。

修改，因为OP澄清了问题......如果这是您遇到问题的行：

if (!String.IsNullOrEmpty(searchString))
{
    movies = movies.Where(s => s.Title.Contains(searchString)
                           || s.Title.Contains(searchString));
}

（顺便说一句，那个||子句检查相同的条件两次!!）...这是建议的修复：

if (!String.IsNullOrEmpty(searchString))
{
    movies = movies.Where(s => s.Title.IndexOf(searchString, 
        StringComparison.CurrentCultureIgnoreCase) != -1);
}

如何使用搜索字符串在MVC中获取不区分大小写的列表？

1 个答案: