在标签表中搜索时如何检索帖子列表 [ASP MVC]

Question

我想通过标签搜索帖子，例如，当我在搜索框中写“ASP”时，我将搜索它们具有相同标签的帖子并将它们作为帖子列表返回...

这是我的标签表：

这也是我的书课：

[Table("Book")]
public partial class Book
{
    [Key]
    public int Book_id { get; set; }

    [Required]
    [Display(Name ="User Name")]
    [StringLength(128)]
    public string User_ID { get; set; }

    [Required]
    [Display(Name = "Title Name")]
    [StringLength(70,MinimumLength =3)]
    public string Book_name { get; set; }

    [Display(Name = "Edition")]
    [Range(1, 20)]
    public int Edition { get; set; }

    [Display(Name = "Category Name")]
    public int Category_id { get; set; }

    [DataType(DataType.Date)]
    [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]    
    [Display(Name = "Publish Date")]
    public DateTime Publish_date { get; set; }

    [StringLength(50)]
    [Display(Name = "Author Name")]
    public string Author_name { get; set; }


    [StringLength(128)]
    [Display(Name = "Cover Image")]
    public string Book_Image { get; set; }


    [StringLength(128,MinimumLength =8)]
    [Url]
    [Display(Name = "Download Link")]
    public string Download_Link { get; set; }


    [StringLength(250)]
    [Display(Name = "Upload Pdf")]
    public string pdf_file { get; set; }


    [AllowHtml]
    [Column(TypeName = "text")]
    [Display(Name = "Description")]
    public string Book_Description { get; set; }


    public int View_Count { set; get; }

    [StringLength(250,MinimumLength =2,ErrorMessage ="Min Tags Input lenght is 2 char")]
    [Display(Name = "Tags")]
    public virtual string TagsListing { get; set; }


    public virtual IList<Tag> Tags
    { get; set; }
    public virtual AspNetUser AspNetUser { get; set; }

    public virtual Category Category { get; set; }
}

还有标签类：

public class Tag
{
    public virtual int Id
    { get; set; }

    public virtual string Name
    { get; set; }

    public virtual string UrlSlug
    { get; set; }

    public virtual string Description
    { get; set; }

    public virtual IList<Book> Books
    { get; set; }
}

我只是想看看访问者搜索的搜索词是否可以在标签表中找到，并返回与相同标签相关的书籍列表..

谢谢

Answer 1

使用 LINQ

var searchTerm = "Swift";
var postList = db.Books.Where(s => s.Tags.Any(g => g.Name.Contains(searchTerm))).ToList();

Contains 将执行与 LIKE '%Swift%' 等效的 SQL。你也可以试试StartsWith或EndsWithas needed.