通过字符串值MVC 5的搜索方法 [英] Search method by string value MVC 5

问题描述

作为我项目的一部分，我需要找到一种通过字符串搜索对象并在视图中显示结果的方法.感谢您的帮助.在我的 MainMedia 视图中，我有一个侧面部分，是我手动将字符串值传递给 SearchMedia 方法:

A a part of my project i need to find a way to search my object by a string and show a result in view. Your help is appreciated. in my MainMedia view i have a sidesection were i manually pass a string value to a SearchMedia method:

@section SideBar{
<ul>        
    <li> @Html.ActionLink("Astronomy", "SearchMedia", new {searchString = "Astronomy" })</li>
    <li> @Html.ActionLink("World", "SearchMedia", new { searchString = "World" })</li>
    <li> @Html.ActionLink("Movies", "SearchMedia", new { searchString = "Movies" })</li>
</ul>
}

此方法应检查每个对象是否包含 TagsEnum 字符串，然后在 SearchMedia 视图中显示一个对象.

This method should check every object if TagsEnum string and then display an object in SearchMedia view.

这是我的媒体课

public class Media
{
    public int Id { get; set; }
    public string title { get; set; }
    public string description { get; set; }
    public string body { get; set; }
    public string ImagePath { get; set; }
    public string VideoLink { get; set; }
    public string Source { get; set; }
    public string tags { get; set; }
    public TagsEnum TagsEnum { get; set; }
}

TagsEnum类

 public enum TagsEnum
    {
        [Display(Name = "Astronomy and space")]
        Astronomy,
        [Display(Name = "World around us")]
        World,
        [Display(Name = "Movies, video")]
        Movies
}

和最终 MediaMainController SearchMedia 方法

public ActionResult SearchMedia(string searchString)
{
    db.Medias.Where(i => i.TagsEnum.ToString() == searchString);
    return View(db.Medias.OrderBy(it => it.Title));
}

据我了解， .Where()应该找到一个匹配项并返回一个对象，但是它不起作用.我如何解决呢?也许还有其他方法可以做到?谢谢

As i understand .Where() should find a match and return an object, however it is not working. How i can sort it out? Perhaps there are other ways to do it? Thank you

更新我已经这样更改了:

Update I have changed it like this:

var result = db.Medias.Where(TagsEnum => TagsEnum.ToString() == searchString);
 return View(result.OrderBy(it => it.title)); 

但我仍然看不到要按搜索排序的结果

but i still dont see the results to be sorted by search

更新2 我有一个用于创建对象列表的 MediaViewModel 类，它看起来像这样:

Update 2 I have a class MediaViewModel which i use to create a list of objects, it looks like this:

 public class MediaViewModel
    {
        public List<Media> media { get; set; }
        public List<Video> video { get; set; }

    }

如果我设置 SearchMedia 这样的视图

@model PhClub.Models.MediaViewModel
@foreach (var b in Model.media)
{}

我遇到错误:传递到字典中的模型项的类型为System.Linq.Enumerable + WhereListIterator 1 [PhClub.Models.Media]，但是此字典需要模型项的类型为PhClub.Models.MediaViewModel.如果我将其设置为

i'm getting an error: The model item passed into the dictionary is of type System.Linq.Enumerable+WhereListIterator 1[PhClub.Models.Media], but this dictionary requires a model item of type PhClub.Models.MediaViewModel. If i set it up as

`@model IEnumerable<PhClub.Models.Media>
    @foreach (var b in Model)
    {}`

这是说媒体"类型的值不能转换为字符串.我认为我需要更改 SearchMedia 方法以支持 MediaView 类，但是我还没有弄清楚.感谢帮助

it is saying Values of type 'Media' can not be converted to string. I think i need to change SearchMedia method to support MediaView class, but i didnt figure it out yet. Help is appreciated

推荐答案

您应将其分配给变量并使用它，

You should assign it to a variable and use it,

 var result = db.Medias.Where(i => i.TagsEnum.ToString() == searchString);
 return View(result.OrderBy(it => it.Title));

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