实现一个能够正常工作的搜索栏的关键是从MVC中的Views向Controllers进行传递搜索关键字，并从数据库中获取匹配的结果。以下是实现搜索栏的代码示例：

1.在MVC中创建一个SearchController：

public class SearchController : Controller { private readonly ApplicationDbContext _context;

public SearchController(ApplicationDbContext context)
{
    _context = context;
}

public async Task Index(string searchString)
{
    var products = from p in _context.Products
                   select p;

    if (!String.IsNullOrEmpty(searchString))
    {
        products = products.Where(s => s.Name.Contains(searchString));
    }

    return View(await products.ToListAsync());
}

}

2.在Views文件夹下创建一个Search文件夹，并在其中创建一个Index.cshtml页面：

@model IEnumerable

@{ ViewData["Title"] = "Search"; }

Search

3.在Startup.cs文件中注册DbContext：

public class Startup { public IConfiguration Configuration { get; }

public Startup(IConfiguration configuration)
{
    Configuration = configuration;
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext(options =>
        options.UseSqlServer