在 ASP.NET Core 项目中向 Identity 添加和下载自定义用户数据，以及从中删除自定义用户数据

作者：Rick Anderson

本文介绍以下操作：

• 向 ASP.NET Core Web 应用添加自定义用户数据。
• 使用 PersonalDataAttribute 属性标记自定义用户数据模型，使它自动可供下载和删除。 使数据能够被下载和删除有助于满足 GDPR 要求。

尽管项目示例是通过 Razor Pages Web 应用创建的，但指令对于 ASP.NET Core MVC Web 应用是类似的。

查看或下载示例代码（如何下载）

先决条件

.NET 6.0 SDK

创建 Razor Web 应用

Visual Studio

• 从 Visual Studio“文件”菜单中选择“新建”>“项目”。 将项目命名为 WebApp1，使它与下载示例代码的命名空间相匹配。
• 选择“ASP.NET Core Web 应用程序”>“确定”
• 选择“Web 应用程序”>“确定”
• 生成并运行该项目。

.NET Core CLI

dotnet new webapp -o WebApp1

运行 Identity 基架

Visual Studio

• 在解决方案资源管理器中，右键单击项目 >“添加”>“已搭建基架的新项”。
• 在“添加基架”对话框的左侧窗格中，选择 Identity>“添加”。
• 在“添加 Identity”对话框中，进行以下操作：
  • 选择现有布局文件 ~/Pages/Shared/_Layout.cshtml
  • 选择要替代的以下文件：
    • Account/Register
    • Account/Manage/Index
  • 选择 + 按钮创建新的“数据上下文类”。 接受类型（如果项目名为 WebApp1，则接受 WebApp1.Models.WebApp1Context）。
  • 选择 + 按钮创建新的“用户类”。 接受类型（如果项目名为 WebApp1，则接受 WebApp1User）>“添加”。
• 选择 添加 。

.NET Core CLI

如果你以前没有安装过 ASP.NET Core 基架，请立即安装它：

dotnet tool install -g dotnet-aspnet-codegenerator

注意

默认情况下，要安装的 .NET 二进制文件的体系结构表示当前运行的 OS 体系结构。 若要指定不同的 OS 体系结构，请参阅 dotnet tool install, --arch option。 有关详细信息，请参阅 GitHub 问题 dotnet/AspNetCore.Docs #29262。

向项目 (.csproj) 文件添加对 Microsoft.VisualStudio.Web.CodeGeneration.Design 的包引用。 在项目目录中运行以下命令：

dotnet add package Microsoft.VisualStudio.Web.CodeGeneration.Design
dotnet restore

运行以下命令以列出 Identity 基架选项：

dotnet aspnet-codegenerator identity -h

在项目文件夹中，运行 Identity 基架：

dotnet aspnet-codegenerator identity -u WebApp1User -fi Account.Register;Account.Manage.Index

PowerShell 使用分号作为命令分隔符。 使用 PowerShell 时，请对文件列表中的分号进行转义，或者用双引号将文件列表括起来。

按照迁移、UseAuthentication 和布局中的说明执行以下步骤：

• 创建迁移并更新数据库。
• 为 Program.cs 添加了 UseAuthentication
• 将 <partial name="_LoginPartial" /> 添加到布局文件中。
• 测试应用：
  • 注册用户
  • 选择新的用户名（“注销”链接旁）。 可能需要展开窗口或选择导航栏图标才能显示用户名和其他链接。
  • 选择“个人数据”选项卡。
  • 选择“下载”按钮，然后检查 PersonalData.json 文件。
  • 测试“删除”按钮，这将删除已登录的用户。

将自定义用户数据添加到 Identity DB

使用自定义属性更新 IdentityUser 派生类。 如果已将项目名为 WebApp1，文件则名为 Areas/Identity/Data/WebApp1User.cs。 使用以下代码更新文件：

using Microsoft.AspNetCore.Identity;

namespace WebApp1.Areas.Identity.Data;

public class WebApp1User : IdentityUser
{
    [PersonalData]
    public string? Name { get; set; }
    [PersonalData]
    public DateTime DOB { get; set; }
}

对于具有 PersonalData 特性的属性：

• 当 Areas/Identity/Pages/Account/Manage/DeletePersonalData.cshtmlRazor Page 调用 UserManager.Delete 时删除。
• 包含在 Areas/Identity/Pages/Account/Manage/DownloadPersonalData.cshtmlRazor Page 下载的数据中。

更新 Account/Manage/Index.cshtml 页面

使用下面突出显示的代码更新 Areas/Identity/Pages/Account/Manage/Index.cshtml.cs 中的 InputModel：

public class IndexModel : PageModel
{
    private readonly UserManager<WebApp1User> _userManager;
    private readonly SignInManager<WebApp1User> _signInManager;

    public IndexModel(
        UserManager<WebApp1User> userManager,
        SignInManager<WebApp1User> signInManager)
    {
        _userManager = userManager;
        _signInManager = signInManager;
    }

    /// <summary>
    ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
    ///     directly from your code. This API may change or be removed in future releases.
    /// </summary>
    public string Username { get; set; }

    // Remaining API warnings ommited.

    [TempData]
    public string StatusMessage { get; set; }

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

    public class InputModel
    {
        [Required]
        [DataType(DataType.Text)]
        [Display(Name = "Full name")]
        public string Name { get; set; }

        [Required]
        [Display(Name = "Birth Date")]
        [DataType(DataType.Date)]
        public DateTime DOB { get; set; }

        [Phone]
        [Display(Name = "Phone number")]
        public string PhoneNumber { get; set; }
    }

    private async Task LoadAsync(WebApp1User user)
    {
        var userName = await _userManager.GetUserNameAsync(user);
        var phoneNumber = await _userManager.GetPhoneNumberAsync(user);

        Username = userName;

        Input = new InputModel
        {
            Name = user.Name,
            DOB = user.DOB,
            PhoneNumber = phoneNumber
        };
    }

    public async Task<IActionResult> OnGetAsync()
    {
        var user = await _userManager.GetUserAsync(User);
        if (user == null)
        {
            return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
        }

        await LoadAsync(user);
        return Page();
    }

    public async Task<IActionResult> OnPostAsync()
    {
        var user = await _userManager.GetUserAsync(User);
        if (user == null)
        {
            return NotFound($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
        }

        if (!ModelState.IsValid)
        {
            await LoadAsync(user);
            return Page();
        }

        var phoneNumber = await _userManager.GetPhoneNumberAsync(user);
        if (Input.PhoneNumber != phoneNumber)
        {
            var setPhoneResult = await _userManager.SetPhoneNumberAsync(user, Input.PhoneNumber);
            if (!setPhoneResult.Succeeded)
            {
                StatusMessage = "Unexpected error when trying to set phone number.";
                return RedirectToPage();
            }
        }

        if (Input.Name != user.Name)
        {
            user.Name = Input.Name;
        }

        if (Input.DOB != user.DOB)
        {
            user.DOB = Input.DOB;
        }

        await _userManager.UpdateAsync(user);
        await _signInManager.RefreshSignInAsync(user);
        StatusMessage = "Your profile has been updated";
        return RedirectToPage();
    }
}

使用下面突出显示的标记更新 Areas/Identity/Pages/Account/Manage/Index.cshtml：

@page
@model IndexModel
@{
    ViewData["Title"] = "Profile";
    ViewData["ActivePage"] = ManageNavPages.Index;
}

<h3>@ViewData["Title"]</h3>
<partial name="_StatusMessage" for="StatusMessage" />
<div class="row">
    <div class="col-md-6">
        <form id="profile-form" method="post">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-floating">
                <input asp-for="Username" class="form-control" disabled />
                <label asp-for="Username" class="form-label"></label>
            </div>
            <div class="form-floating">
                <input asp-for="Input.Name" class="form-control" />
                <label asp-for="Input.Name" class="form-label"></label>
            </div>
            <div class="form-floating">
                <input asp-for="Input.DOB" class="form-control" />
                <label asp-for="Input.DOB" class="form-label"></label>
            </div>
            <div class="form-floating">
                <input asp-for="Input.PhoneNumber" class="form-control" />
                <label asp-for="Input.PhoneNumber" class="form-label"></label>
                <span asp-validation-for="Input.PhoneNumber" class="text-danger"></span>
            </div>
            <button id="update-profile-button" type="submit" class="w-100 btn btn-lg btn-primary">Save</button>
        </form>
    </div>
</div>

@section Scripts {
    <partial name="_ValidationScriptsPartial" />
}

更新 Account/Register.cshtml 页面

使用下面突出显示的代码更新 Areas/Identity/Pages/Account/Register.cshtml.cs 中的 InputModel：

    public class RegisterModel : PageModel
    {
        private readonly SignInManager<WebApp1User> _signInManager;
        private readonly UserManager<WebApp1User> _userManager;
        private readonly IUserStore<WebApp1User> _userStore;
        private readonly IUserEmailStore<WebApp1User> _emailStore;
        private readonly ILogger<RegisterModel> _logger;
        private readonly IEmailSender _emailSender;

        public RegisterModel(
            UserManager<WebApp1User> userManager,
            IUserStore<WebApp1User> userStore,
            SignInManager<WebApp1User> signInManager,
            ILogger<RegisterModel> logger,
            IEmailSender emailSender)
        {
            _userManager = userManager;
            _userStore = userStore;
            _emailStore = GetEmailStore();
            _signInManager = signInManager;
            _logger = logger;
            _emailSender = emailSender;
        }

        /// <summary>
        ///     This API supports the ASP.NET Core Identity default UI infrastructure and is not intended to be used
        ///     directly from your code. This API may change or be removed in future releases.
        /// </summary>
        [BindProperty]
        public InputModel Input { get; set; }

        // Remaining API warnings ommited.
        public string ReturnUrl { get; set; }

        public IList<AuthenticationScheme> ExternalLogins { get; set; }

        public class InputModel
        {
            [Required]
            [DataType(DataType.Text)]
            [Display(Name = "Full name")]
            public string Name { get; set; }

            [Required]
            [Display(Name = "Birth Date")]
            [DataType(DataType.Date)]
            public DateTime DOB { get; set; }

            [Required]
            [EmailAddress]
            [Display(Name = "Email")]
            public string Email { get; set; }

            [Required]
            [StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.", MinimumLength = 6)]
            [DataType(DataType.Password)]
            [Display(Name = "Password")]
            public string Password { get; set; }

            [DataType(DataType.Password)]
            [Display(Name = "Confirm password")]
            [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
            public string ConfirmPassword { get; set; }
        }


        public async Task OnGetAsync(string returnUrl = null)
        {
            ReturnUrl = returnUrl;
            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
        }

        public async Task<IActionResult> OnPostAsync(string returnUrl = null)
        {
            returnUrl ??= Url.Content("~/");
            ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
            if (ModelState.IsValid)
            {
                var user = CreateUser();

                user.Name = Input.Name;
                user.DOB = Input.DOB;

                await _userStore.SetUserNameAsync(user, Input.Email, CancellationToken.None);
                await _emailStore.SetEmailAsync(user, Input.Email, CancellationToken.None);
                var result = await _userManager.CreateAsync(user, Input.Password);

                if (result.Succeeded)
                {
                    _logger.LogInformation("User created a new account with password.");

                    var userId = await _userManager.GetUserIdAsync(user);
                    var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
                    code = WebEncoders.Base64UrlEncode(Encoding.UTF8.GetBytes(code));
                    var callbackUrl = Url.Page(
                        "/Account/ConfirmEmail",
                        pageHandler: null,
                        values: new { area = "Identity", userId = userId, code = code, returnUrl = returnUrl },
                        protocol: Request.Scheme);

                    await _emailSender.SendEmailAsync(Input.Email, "Confirm your email",
                        $"Please confirm your account by <a href='{HtmlEncoder.Default.Encode(callbackUrl)}'>clicking here</a>.");

                    if (_userManager.Options.SignIn.RequireConfirmedAccount)
                    {
                        return RedirectToPage("RegisterConfirmation", new { email = Input.Email, returnUrl = returnUrl });
                    }
                    else
                    {
                        await _signInManager.SignInAsync(user, isPersistent: false);
                        return LocalRedirect(returnUrl);
                    }
                }
                foreach (var error in result.Errors)
                {
                    ModelState.AddModelError(string.Empty, error.Description);
                }
            }

            // If we got this far, something failed, redisplay form
            return Page();
        }

        private WebApp1User CreateUser()
        {
            try
            {
                return Activator.CreateInstance<WebApp1User>();
            }
            catch
            {
                throw new InvalidOperationException($"Can't create an instance of '{nameof(WebApp1User)}'. " +
                    $"Ensure that '{nameof(WebApp1User)}' is not an abstract class and has a parameterless constructor, or alternatively " +
                    $"override the register page in /Areas/Identity/Pages/Account/Register.cshtml");
            }
        }

        private IUserEmailStore<WebApp1User> GetEmailStore()
        {
            if (!_userManager.SupportsUserEmail)
            {
                throw new NotSupportedException("The default UI requires a user store with email support.");
            }
            return (IUserEmailStore<WebApp1User>)_userStore;
        }
    }
}

使用下面突出显示的标记更新 Areas/Identity/Pages/Account/Register.cshtml：

@page
@model RegisterModel
@{
    ViewData["Title"] = "Register";
}

<h1>@ViewData["Title"]</h1>

<div class="row">
    <div class="col-md-4">
        <form id="registerForm" asp-route-returnUrl="@Model.ReturnUrl" method="post">
            <h2>Create a new account.</h2>
            <hr />
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>

            <div class="form-floating">
                <label asp-for="Input.Name"></label>
                <input asp-for="Input.Name" class="form-control" />
                <span asp-validation-for="Input.Name" class="text-danger"></span>
            </div>
            <div class="form-floating">
                <label asp-for="Input.DOB"></label>
                <input asp-for="Input.DOB" class="form-control" />
                <span asp-validation-for="Input.DOB" class="text-danger"></span>
            </div>

            <div class="form-floating">
                <input asp-for="Input.Email" class="form-control" autocomplete="username" aria-required="true" />
                <label asp-for="Input.Email"></label>
                <span asp-validation-for="Input.Email" class="text-danger"></span>
            </div>
            <div class="form-floating">
                <input asp-for="Input.Password" class="form-control" autocomplete="new-password" aria-required="true" />
                <label asp-for="Input.Password"></label>
                <span asp-validation-for="Input.Password" class="text-danger"></span>
            </div>
            <div class="form-floating">
                <input asp-for="Input.ConfirmPassword" class="form-control" autocomplete="new-password" aria-required="true" />
                <label asp-for="Input.ConfirmPassword"></label>
                <span asp-validation-for="Input.ConfirmPassword" class="text-danger"></span>
            </div>
            <button id="registerSubmit" type="submit" class="w-100 btn btn-lg btn-primary">Register</button>
        </form>
    </div>
    <div class="col-md-6 col-md-offset-2">
        <section>
            <h3>Use another service to register.</h3>
            <hr />
            @{
                if ((Model.ExternalLogins?.Count ?? 0) == 0)
                {
                    <div>
                        <p>
                            There are no external authentication services configured. See this <a href="https://go.microsoft.com/fwlink/?LinkID=532715">article
                            about setting up this ASP.NET application to support logging in via external services</a>.
                        </p>
                    </div>
                }
                else
                {
                    <form id="external-account" asp-page="./ExternalLogin" asp-route-returnUrl="@Model.ReturnUrl" method="post" class="form-horizontal">
                        <div>
                            <p>
                                @foreach (var provider in Model.ExternalLogins!)
                                {
                                    <button type="submit" class="btn btn-primary" name="provider" value="@provider.Name" title="Log in using your @provider.DisplayName account">@provider.DisplayName</button>
                                }
                            </p>
                        </div>
                    </form>
                }
            }
        </section>
    </div>
</div>

@section Scripts {
    <partial name="_ValidationScriptsPartial" />
}

生成项目。

更新布局

有关向每个页面添加登录和取消登录链接的说明，请参阅布局更改。

添加自定义用户数据的迁移

Visual Studio

在 Visual Studio“包管理器控制台”中：

Add-Migration CustomUserData
Update-Database

.NET Core CLI

dotnet ef migrations add CustomUserData
dotnet ef database update

测试创建、查看、下载和删除自定义用户数据

测试应用：

• 注册新用户。
• 在 /Identity/Account/Manage 页面上查看自定义用户数据。
• 从 /Identity/Account/Manage/PersonalData 页面下载并查看用户个人数据。