Blazor 專案中，使用 Scaffold 身分識別修改登入頁面成為中文版
使用預設專案範本建立 Blazor 專案
- 打開 Visual Studio 2019 開發工具
- 當 [Visual Studio 2019] 對話窗出現之後，點選右下方的 [建立新的專案] 按鈕
- 在 [建立新專案] 對話窗內，請找出 [Blazor 應用程式] 這個專案開發範本，並且點選這個專案開發範本
- 請點選右下角 [下一步] 按鈕
- 出現 [設定新的專案] 對話窗，輸入適當的 [專案名稱] 、 [位置] ，完成後，請點選右下角 [建立] 按鈕
🕬 說明
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- 此時將會看到 [建立新的 Blazor 應用程式] 對話窗
- 在該對話窗的右上方找到 [驗證] 文字，點選該文字下方的 [變更] 連結
- 現在將會看到 [變更驗證] 這個對話窗
- 請選擇 [個別使用者帳戶] 選項
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- 此時回到了 [建立新的 Blazor 應用程式] 對話窗
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- 此時，這個 Blazor 專案已經建立完成
🔑 注意事項
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執行並且查看登入畫面
產生 Scaffold 身分識別 程式碼
- 滑鼠右擊該專案節點
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- 請點選左邊的 [識別] 標籤頁次，中間將會出現預設 [識別] 選項
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- 在 [資料內容類別] 下拉選單中，點選該下拉選單，選擇 ApplicationDbContext (BlazorScaffoldIdentity.Data) 這個選項
- 完成後，請點選右下角的 [新增] 按鈕
- 等候一段時間，相關程式碼就會產生出來
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Support for ASP.NET Core Identity was added to your project
- The code for adding Identity to your project was generated under Areas/Identity.
Configuration of the Identity related services can be found in the Areas/Identity/IdentityHostingStartup.cs file.
The generated UI requires support for static files. To add static files to your app:
1. Call app.UseStaticFiles() from your Configure method
To use ASP.NET Core Identity you also need to enable authentication. To authentication to your app:
1. Call app.UseAuthentication() from your Configure method (after static files)
The generated UI requires MVC. To add MVC to your app:
1. Call services.AddMvc() from your ConfigureServices method
2. Call app.UseRouting() at the top your Configure method, and UseEndpoints() after authentication:
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapRazorPages();
});
Apps that use ASP.NET Core Identity should also use HTTPS. To enable HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.
using System;
using BlazorScaffoldIdentity.Data;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
[assembly: HostingStartup(typeof(BlazorScaffoldIdentity.Areas.Identity.IdentityHostingStartup))]
namespace BlazorScaffoldIdentity.Areas.Identity
{
public class IdentityHostingStartup : IHostingStartup
{
public void Configure(IWebHostBuilder builder)
{
builder.ConfigureServices((context, services) => {
});
}
}
}
@using Microsoft.AspNetCore.Identity
@using BlazorScaffoldIdentity.Areas.Identity
@using BlazorScaffoldIdentity.Areas.Identity.Pages
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@{
Layout = "/Pages/Shared/_Layout.cshtml";
}
@using BlazorScaffoldIdentity.Areas.Identity.Pages.Account
@page
@model LoginModel
@{
ViewData["Title"] = "Log in";
}
<h1>@ViewData["Title"]</h1>
<div class="row">
<div class="col-md-4">
<section>
<form id="account" method="post">
<h4>Use a local account to log in.</h4>
<hr />
<div asp-validation-summary="All" class="text-danger"></div>
<div class="form-group">
<label asp-for="Input.Email"></label>
<input asp-for="Input.Email" class="form-control" />
<span asp-validation-for="Input.Email" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Input.Password"></label>
<input asp-for="Input.Password" class="form-control" />
<span asp-validation-for="Input.Password" class="text-danger"></span>
</div>
<div class="form-group">
<div class="checkbox">
<label asp-for="Input.RememberMe">
<input asp-for="Input.RememberMe" />
@Html.DisplayNameFor(m => m.Input.RememberMe)
</label>
</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary">Log in</button>
</div>
<div class="form-group">
<p>
<a id="forgot-password" asp-page="./ForgotPassword">Forgot your password?</a>
</p>
<p>
<a asp-page="./Register" asp-route-returnUrl="@Model.ReturnUrl">Register as a new user</a>
</p>
</div>
</form>
</section>
</div>
<div class="col-md-6 col-md-offset-2">
<section>
<h4>Use another service to log in.</h4>
<hr />
@{
if ((Model.ExternalLogins?.Count ?? 0) == 0)
{
<div>
<p>
There are no external authentication services configured. See <a href="https://go.microsoft.com/fwlink/?LinkID=532715">this article</a>
for details on setting up this ASP.NET application to support logging in via external services.
</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" />
}
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text.Encodings.Web;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI.Services;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.Extensions.Logging;
namespace BlazorScaffoldIdentity.Areas.Identity.Pages.Account
{
[AllowAnonymous]
public class LoginModel : PageModel
{
private readonly UserManager<IdentityUser> _userManager;
private readonly SignInManager<IdentityUser> _signInManager;
private readonly ILogger<LoginModel> _logger;
public LoginModel(SignInManager<IdentityUser> signInManager,
ILogger<LoginModel> logger,
UserManager<IdentityUser> userManager)
{
_userManager = userManager;
_signInManager = signInManager;
_logger = logger;
}
[BindProperty]
public InputModel Input { get; set; }
public IList<AuthenticationScheme> ExternalLogins { get; set; }
public string ReturnUrl { get; set; }
[TempData]
public string ErrorMessage { get; set; }
public class InputModel
{
[Required]
[EmailAddress]
public string Email { get; set; }
[Required]
[DataType(DataType.Password)]
public string Password { get; set; }
[Display(Name = "Remember me?")]
public bool RememberMe { get; set; }
}
public async Task OnGetAsync(string returnUrl = null)
{
if (!string.IsNullOrEmpty(ErrorMessage))
{
ModelState.AddModelError(string.Empty, ErrorMessage);
}
returnUrl = returnUrl ?? Url.Content("~/");
await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);
ExternalLogins = (await _signInManager.GetExternalAuthenticationSchemesAsync()).ToList();
ReturnUrl = returnUrl;
}
public async Task<IActionResult> OnPostAsync(string returnUrl = null)
{
returnUrl = returnUrl ?? Url.Content("~/");
if (ModelState.IsValid)
{
var result = await _signInManager.PasswordSignInAsync(Input.Email, Input.Password, Input.RememberMe, lockoutOnFailure: false);
if (result.Succeeded)
{
_logger.LogInformation("User logged in.");
return LocalRedirect(returnUrl);
}
if (result.RequiresTwoFactor)
{
return RedirectToPage("./LoginWith2fa", new { ReturnUrl = returnUrl, RememberMe = Input.RememberMe });
}
if (result.IsLockedOut)
{
_logger.LogWarning("User account locked out.");
return RedirectToPage("./Lockout");
}
else
{
ModelState.AddModelError(string.Empty, "Invalid login attempt.");
return Page();
}
}
return Page();
}
}
}
將 Login 登入畫面，改成為中文版本
更多關於 Blazor 教學影片，可以參考 Blazor 教學影片播放清單 或者 Blazor 快速體驗教學影片撥放清單。也歡迎訂閱本 .NET / Blazor / Xamarin.Forms 影片頻道 。
在這篇文章中，將要來實際體驗一下，Blazor 專案內的 同步內容 SynchronizationContext 使用注意事項與正確使用方式。