json - 带有 JSON 参数的 HttpPost 在 ASP.NET Core 3 中不起作用

Question

因此，我将我的 RestAPI 项目从 ASP.NET Core 2.1 迁移到 ASP.NET Core 3.0，之前工作的 HttpPost 函数停止工作。

    [AllowAnonymous]
    [HttpPost]
    public IActionResult Login([FromBody]Application login)
    {
        _logger.LogInfo("Starting Login Process...");

        IActionResult response = Unauthorized();
        var user = AuthenticateUser(login);

        if (user != null)
        {
            _logger.LogInfo("User is Authenticated");
            var tokenString = GenerateJSONWebToken(user);

            _logger.LogInfo("Adding token to cache");
            AddToCache(login.AppName, tokenString);                

            response = Ok(new { token = tokenString });

            _logger.LogInfo("Response received successfully");
        }

        return response;
    }

现在，登录对象的每个属性都有空值。我读了here , 那

By default, when you call AddMvc() in Startup.cs, a JSON formatter, JsonInputFormatter, is automatically configured, but you can add additional formatters if you need to, for example to bind XML to an object.

由于在 aspnetcore 3.0 中删除了 AddMvc，现在我觉得这就是我无法再获取 JSON 对象的原因。我的 Startup 类 Configure 函数如下所示:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
       if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseHsts();
        }
        app.UseHttpsRedirection();
        app.UseAuthentication();
        app.UseRouting();
        //app.UseAuthorization();
        //app.UseMvc(options
        //    /*routes => {
        //    routes.MapRoute("default", "{controller=Values}/{action}/{id?}");
        //}*/);
        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
            endpoints.MapRazorPages();
        });
    }

我通过 postman 发送的请求(选择了原始和 JSON 选项)

{ "AppName":"XAMS", "licenseKey": "XAMSLicenseKey" }

更新

postman 标题:Content-Type:application/json

启动.cs

public void ConfigureServices(IServiceCollection services)
    {            
        //_logger.LogInformation("Starting Log..."); //shows in output window

        services.AddSingleton<ILoggerManager, LoggerManager>();

        services.AddMemoryCache();
        services.AddDbContext<GEContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
        //services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);
        services.AddControllers();
        services.AddRazorPages();

        //Authentication
        services.AddAuthentication(options =>
        {
            options.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
            options.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        }).AddJwtBearer(options =>
        {
            options.Authority = "https://localhost:44387/";
            options.Audience = "JWT:Issuer";
            options.TokenValidationParameters.ValidateLifetime = true;
            options.TokenValidationParameters.ClockSkew = TimeSpan.FromMinutes(5);
            options.RequireHttpsMetadata = false;
        });

        services.AddAuthorization(options =>
        {
            options.AddPolicy("GuidelineReader", p => {
                p.RequireClaim("[url]", "GuidelineReader");
            });
        });
        //
    }

应用程序.cs

 public class Application
 {
    public string AppName;
    public string licenseKey;
 }

Answer 1

随着您更新代码，我认为原因是您没有为您的属性创建 setter。

要解决此问题，请按如下方式更改您的 Application 模型:

public class Application{    public string AppName  {get;set;}    public string licenseKey  {get;set;}}