我有 .net 8.0 的应用程序，blazor。我使用带有身份日志记录的默认 blazor 模板。当我使用
<Routes @rendermode="InteractiveServer"/>`using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using BlazorApp1.Components;
using BlazorApp1.Components.Account;
using BlazorApp1.Data;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddRazorComponents()
.AddInteractiveServerComponents();
builder.Services.AddCascadingAuthenticationState();
builder.Services.AddScoped<IdentityUserAccessor>();
builder.Services.AddScoped<IdentityRedirectManager>();
builder.Services.AddScoped<AuthenticationStateProvider, IdentityRevalidatingAuthenticationStateProvider>();
builder.Services.AddAuthentication(options =>
{
options.DefaultScheme = IdentityConstants.ApplicationScheme;
options.DefaultSignInScheme = IdentityConstants.ExternalScheme;
})
.AddIdentityCookies();
var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ??
throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
builder.Services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlite(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();
builder.Services.AddIdentityCore<ApplicationUser>(options => options.SignIn.RequireConfirmedAccount = true)
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddSignInManager()
.AddDefaultTokenProviders();
builder.Services.AddSingleton<IEmailSender<ApplicationUser>, IdentityNoOpEmailSender>();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseMigrationsEndPoint();
}
else
{
app.UseExceptionHandler("/Error", createScopeForErrors: true);
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseAntiforgery();
app.MapRazorComponents<App>()
.AddInteractiveServerRenderMode();
// Add additional endpoints required by the Identity /Account Razor components.
app.MapAdditionalIdentityEndpoints();
app.Run();`
和App.razor：
`<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<base href="/"/>
<link rel="stylesheet" href="bootstrap/bootstrap.min.css"/>
<link rel="stylesheet" href="app.css"/>
<link rel="stylesheet" href="BlazorApp1.styles.css"/>
<link rel="icon" type="image/png" href="favicon.png"/>
<HeadOutlet/>
</head>
<body>
<Routes @rendermode="InteractiveServer"/>
<script src="_framework/blazor.web.js"></script>
</body>
</html>`
我将闪烁页面减少到
@page "/Account/Login"`@inherits LayoutComponentBase
@Body`
出了什么问题？
当设置为InterActiveServer时，页面将渲染两次。
第一：预渲染（SSR），
HttpContextHttpContext.SignInAsyncHttpContext显然，身份页面需要
HttpContext<Routes @rendermode="RenderModeForPage" />
...
private IComponentRenderMode? RenderModeForPage =>
HttpContext.Request.Path.StartsWithSegments("/Account")
? null
: InterActiveServer;