ASP.Net Core Identity - 管理其他用户答案

【问题标题】：ASP.Net Core Identity - Manage other usersASP.Net Core Identity - 管理其他用户
【发布时间】：2021-01-10 13:07:14
【问题描述】：

我自定义了默认用户身份并创建了多个用户。假设我是管理员并且我想管理其他用户信息（更改属性值）。如果我有他们的 ID，我如何访问其他用户的数据。

我可以检索表中的所有用户并在“asp-route-id”中获取他们的 ID

    @foreach (var item in Model.ApplicationUser)
    {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.FirstName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.LastName)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Id)
            </td>
            <td>
                <a class="nav-link text-dark" asp-area="Identity" asp-page="/Account/Manage/Index" title="Manage" asp-route-id="@item.Id">Edit</a>

我在使用 userManager 检索\更新其他用户信息时卡住了在 Get 和 Post 方法中。

【问题讨论】：

标签： asp.net-core identity usermanager

【解决方案1】：

我设法使用 lambda 表达式解决了它

var UsertoEdit = _userManager.Users.FirstOrDefault(u => u.Id == ID);

ID应该通过asp-route获取

我已发布以下代码供参考：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using WebApplication2.Models;

namespace WebApplication2.Areas.Identity.Pages.Account.Manage
{

    public partial class IndexModel : PageModel
    {
        private readonly UserManager<ApplicationUser> _userManager;
        //private readonly SignInManager<ApplicationUser> _signInManager;

        public IndexModel(
            UserManager<ApplicationUser> userManager)

        {
            _userManager = userManager;

        }



        [BindProperty]
        public InputModel Input { get; set; }



        public class InputModel
        {

            public string FirstName { get; set; }
            public string LastName { get; set; }
            public string Username { get; set; }


        }

        private async Task LoadAsync(string ID)
        {


            var UsertoEdit = _userManager.Users.FirstOrDefault(u => u.Id == ID);



            Input = new InputModel
            {
                FirstName = UsertoEdit.FirstName,
                LastName = UsertoEdit.LastName,
                Username = UsertoEdit.UserName
            };
        }

        public async Task<IActionResult> OnGetAsync(string ID)
        {
            var UsertoEdit = _userManager.Users.FirstOrDefault(u => u.Id == ID);

            if (UsertoEdit == null)
            {
                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
            }



            await LoadAsync(ID);
            return Page();

        }

        public async Task<IActionResult> OnPostAsync(string ID)
        {

            var UsertoEdit = _userManager.Users.FirstOrDefault(u => u.Id == ID);

            if (UsertoEdit == null)
            {
                return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
            }

            if (!ModelState.IsValid)
            {

                await LoadAsync(UsertoEdit.UserName);
                return Page();
            }
            if (Input.FirstName != UsertoEdit.FirstName)
            {
                UsertoEdit.FirstName = Input.FirstName;
            }

            if (Input.LastName != UsertoEdit.LastName)
            {
                UsertoEdit.LastName = Input.LastName;
            }
            await _userManager.UpdateAsync(UsertoEdit);

            return RedirectToPage("/Users");
        }
    }
}

【讨论】：