c# - NET Core Cors 抛出错误

Question

所以我有以下内容:

public void ConfigureServices(IServiceCollection services)
{
    var corsBuilder = new CorsPolicyBuilder();
    corsBuilder.AllowAnyHeader();
    corsBuilder.AllowAnyMethod();
    corsBuilder.AllowAnyOrigin();
    corsBuilder.AllowCredentials();

    services.AddCors(options =>
    {
        options.AddPolicy("AllowAllOrigins", corsBuilder.Build());
    });

    services.AddDbContextPool<ApplicationDbContext>(options =>
        options.UseSqlServer(
            Configuration.GetConnectionString("DefaultConnection")));
    services.AddIdentity<ApplicationUser, IdentityRole>()
        .AddEntityFrameworkStores<ApplicationDbContext>();

    services.AddMvc()
        .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
        .AddJsonOptions(
            options => options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
        );

    services.Configure<Infrastructure.FileOptions>(Configuration.GetSection("Files"));
    services.AddTransient<Infrastructure.ServiceCollection>();
}

如您所见，我允许所有人访问我的路线。

但是，当我尝试访问路由时出现以下错误:

Failed to load https://localhost:44381/test: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:4200' is therefore not allowed access.

我做错了什么？

Answer 1

你应该在配置方法中添加这一行

app.UseCors("AllowAllOrigins");

这会激活您在服务中配置的 AllowAllOrigins。