正在获取当前用户(aspnetcore标识)

Question

我正在尝试使用Identity包获取当前用户(执行该方法的用户(的id。上下文是UserManager<应用程序用户>(ApplicationUser是IdentityUser(。

var currentUserId = User.FindFirst(ClaimTypes.NameIdentifier).Value;

当用户登录时，我会将其添加到声明列表中。"user"是DB中的ApplicationUser。

new Claim(ClaimTypes.NameIdentifier, user.Id),

我还使用了这个文档，并在Program.cs.中添加了以下内容

builder.Services.Configure<IdentityOptions>(options =>
options.ClaimsIdentity.UserIdClaimType = ClaimTypes.NameIdentifier);

然而，我一直得到一个"；System.NullReferenceException："对象引用未设置为对象的实例。"错误

链接还显示我可以将当前用户作为

var user = await userManager.GetUserAsync(User);

然而，这只是使用户为null。

我正在使用poster/swagger进行调试。

以下是整个堆栈跟踪：

System.NullReferenceException: Object reference not set to an instance of an object.
at Server.Authentication.Controllers.AuthController.UpdateUser(String id, UpdateModel model) in C:i2PromoCreatepromocreateServerAuthenticationControllersAuthController.cs:line 168
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

有人能告诉我我做错了什么吗？

Answer 1

我在回答我自己的问题。我只需要方法上方的[Authorize]属性。