Добавил функционал поиска пользователей по имени, мылу и логину.

PhoneStore/Controllers/AccountController.cs

@@ -3,7 +3,6 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using PhoneStore.Enums;
 using PhoneStore.Helpers;
-using PhoneStore.Models;
 using PhoneStore.Services.Abstractions;
 using PhoneStore.ViewModels.Account;
 
@@ -74,5 +73,12 @@ namespace PhoneStore.Controllers
             await _accountService.LogOf();
             return RedirectToAction("Index", "Phones");
         }
+
+        [HttpGet]
+        public IActionResult SearchAccounts(string searchTerm)
+        {
+            var users = _accountService.SearchUsersByAnyTerm(searchTerm);
+            return PartialView("PartialViews/SearchResultPartial", users);
+        }
     }
 }
\ No newline at end of file

PhoneStore/Helpers/ServiceConnector.cs

@@ -22,6 +22,7 @@ namespace PhoneStore.Helpers
             services.AddTransient<IUsersFilter, UsersFilter>();
             services.AddTransient<IPaginationService<User>, PaginationService<User>>();
             services.AddTransient<IAccountService, AccountService>();
+            services.AddTransient<IUsersSearcher, UsersSearcher>();
         }
     }
 }
\ No newline at end of file

PhoneStore/Services/Abstractions/IAccountService.cs

+using System.Collections.Generic;
 using System.Threading.Tasks;
 using PhoneStore.DataObjects;
+using PhoneStore.Models;
 using PhoneStore.ViewModels.Account;
 
 namespace PhoneStore.Services.Abstractions
@@ -9,5 +11,6 @@ namespace PhoneStore.Services.Abstractions
         Task<IdentityResult> Register(RegisterViewModel model);
         Task<IdentityResult> LogIn(LoginViewModel model);
         Task LogOf();
+        IEnumerable<User> SearchUsersByAnyTerm(string searchTerm);
     }
 }
\ No newline at end of file

PhoneStore/Services/Abstractions/IUsersSearcher.cs

+using System.Collections.Generic;
+using PhoneStore.Models;
+
+namespace PhoneStore.Services.Abstractions
+{
+    public interface IUsersSearcher
+    {
+        IEnumerable<User> SearchByName(string searchTerm);
+        IEnumerable<User> SearchByLogin(string searchTerm);
+        IEnumerable<User> SearchByEmail(string searchTerm);
+    }
+}
\ No newline at end of file

PhoneStore/Services/AccountService.cs

@@ -2,11 +2,13 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Mvc;
 using PhoneStore.Enums;
 using PhoneStore.Models;
 using PhoneStore.Services.Abstractions;
 using PhoneStore.ViewModels.Account;
 using IdentityResult = PhoneStore.DataObjects.IdentityResult;
+using SignInResult = Microsoft.AspNetCore.Identity.SignInResult;
 
 namespace PhoneStore.Services
 {
@@ -14,13 +16,16 @@ namespace PhoneStore.Services
     {
         private readonly UserManager<User> _userManager;
         private readonly SignInManager<User> _signInManager;
+        private readonly IUsersSearcher _usersSearcher;
 
         public AccountService(
             UserManager<User> userManager, 
-            SignInManager<User> signInManager)
+            SignInManager<User> signInManager, 
+            IUsersSearcher usersSearcher)
         {
             _userManager = userManager;
             _signInManager = signInManager;
+            _usersSearcher = usersSearcher;
         }
 
         public async Task<IdentityResult> Register(RegisterViewModel model)
@@ -34,7 +39,9 @@ namespace PhoneStore.Services
             User user = new User
             {
                 Email = model.Email,
-                UserName = model.Email
+                UserName = model.Email,
+                Age = model.Age,
+                Name = model.Name
             };
             var result = await _userManager.CreateAsync(user, model.Password);
             if (result.Succeeded)
@@ -74,5 +81,19 @@ namespace PhoneStore.Services
 
         public async Task LogOf() 
             => await _signInManager.SignOutAsync();
+
+        [HttpGet]
+        public IEnumerable<User> SearchUsersByAnyTerm(string searchTerm)
+        {
+            var resultByName = _usersSearcher.SearchByName(searchTerm);
+            var resultByLogin = _usersSearcher.SearchByLogin(searchTerm);
+            var resultByEmail = _usersSearcher.SearchByEmail(searchTerm);
+            var users = resultByName
+                .Concat(resultByLogin)
+                .Concat(resultByEmail)
+                .ToHashSet();
+            
+            return users;
+        }
     }
 }
\ No newline at end of file

PhoneStore/Services/UsersSearcher.cs

+using System;
+using System.Collections.Generic;
+using System.Linq;
+using PhoneStore.Models;
+using PhoneStore.Services.Abstractions;
+
+namespace PhoneStore.Services
+{
+    public class UsersSearcher : IUsersSearcher
+    {
+        private readonly MobileContext _db;
+
+        public UsersSearcher(MobileContext db)
+        {
+            _db = db;
+        }
+
+        public IEnumerable<User> SearchByName(string searchTerm)
+            => _db.Users.Where(u => u.Name
+                .ToLower()
+                .Contains(searchTerm
+                    .ToLower()));
+
+        public IEnumerable<User> SearchByLogin(string searchTerm)
+            => _db.Users.Where(u => u.UserName.ToLower().Contains(searchTerm.ToLower()));
+
+        public IEnumerable<User> SearchByEmail(string searchTerm)
+            => _db.Users.Where(u => u.Email.ToLower().Contains(searchTerm.ToLower()));
+    }
+}
\ No newline at end of file

PhoneStore/Views/Account/PartialViews/SearchResultPartial.cshtml

+@model IEnumerable<User>
+
+@if (Model.Any())
+{
+    var i = 1;
+    <table class="table table-striped">
+        <thead>
+        <tr>
+            <th scope="col">#</th>
+            <th scope="col">Name</th>
+            <th scope="col">Email</th>
+            <th scope="col">UserName</th>
+            <th scope="col">Age</th>
+        </tr>
+        </thead>
+        <tbody>
+        @foreach (var user in Model)
+        {
+            <tr>
+                <th scope="row" id="@user.Id">@(i++)</th>
+                <td>@user.Name</td>
+                <td>@user.Email</td>
+                <td>@user.UserName</td>
+                <td>@user.Age</td>
+            </tr>
+        }
+        </tbody>
+    </table>
+}
+else
+{
+    <p>Список пуст</p>
+}
\ No newline at end of file

PhoneStore/Views/Phones/About.cshtml

-@model Phone
+@model PhoneViewModel
 
 @{
     ViewBag.Title = "Подробная информация";

PhoneStore/Views/Shared/_Layout.cshtml

@@ -27,6 +27,9 @@
                     <li class="nav-item">
                         <a class="nav-link text-dark" asp-area="" asp-controller="Brands" asp-action="Create">Добавить бренд</a>
                     </li>
+                    <li class="nav-item">
+                        <input type="text" id="search" class="form-control" placeholder="Критерии для поиска">
+                    </li>
                 </ul>
             </div>
             <div class="login_group">
@@ -49,6 +52,7 @@
 </header>
 <div class="container">
     <main role="main" class="pb-3">
+        <div id="results"></div>
         @RenderBody()
     </main>
 </div>

PhoneStore/appsettings.json

 {
   "ConnectionStrings": {
-    "DefaultConnection": "Server=localhost;Port=54320;database=lesson58;Username=postgres;Password=postgres;"
+    "DefaultConnection": "Server=localhost;Port=54320;database=lesson63;Username=postgres;Password=postgres;"
   },
   "Logging": {
     "LogLevel": {

PhoneStore/wwwroot/js/site.js

-// Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
-// for details on configuring this project to bundle and minify static web assets.
-
-// Write your JavaScript code.
+$(document).ready(function (){
+    $('#search').on('keyup', function (e){
+        e.preventDefault();
+        let searchTerm = $(this).val();
+        console.log(searchTerm)
+        searchTerm = encodeURIComponent(searchTerm);
+        console.log(searchTerm)
+        $('#results')
+            .load(`https://localhost:5001/Account/SearchAccounts?searchTerm=${searchTerm}`);
+    })
+});
\ No newline at end of file