C# 我能'；当我的筛选器方法为异步时，不要将对象从筛选器传递到控制器。为什么？

我有以下型号：

客户：

public class Customer
{
    public int CustomerId { get; set; }
   ... some props
}

以及以下存储库模式方法：

public async Task<T> GetAsync(Expression<Func<T, bool>> where, string includeProperties = "")
{
    IQueryable<T> query = _dbset; 

    foreach (var includeProperty in includeProperties.Split
        (new char[] {','}, StringSplitOptions.RemoveEmptyEntries))
    {
        query = query.Include(includeProperty);
    }

    return  await query.FirstOrDefaultAsync(where);
}

但运行后，我有以下异常：

“IncludeCustomerToHttpContext”不是属性

---

我忘了什么

您可能想看看下面的问题

async void

。由于您没有返回

任务

，ASP.NET核心MVC管道不会等待异步调用完成。覆盖

OnActionExecutionAsync

，如@Nkosi链接的答案所示。谢谢您的评论，您能检查问题的更新吗？完成）只是忘记继承

属性（谢谢您的评论）
public class IncludeCustomerToHttpContext : ActionFilterAttribute
{
    public override async void OnActionExecuting(ActionExecutingContext context)
    {
        var customerRepository = context.HttpContext.RequestServices.GetService<ICustomerRepository>();

        var authHeader = context.HttpContext.Request?.Headers["Authorization"].ToString();

        if (!Int32.TryParse(authHeader, out int clientId))
        {
            context.Result = new UnauthorizedResult();
        }

        var customer = await customerRepository.GetAsync(x => x.CustomerId == clientId, typeof(Application).Name);

        if (customer == null)
        {
            context.Result = new UnauthorizedResult();
        }

        context.ActionArguments["Customer"] = customer;
    }
}

public async Task<IActionResult> Update([FromBody] CustomerChangeViewModel viewModel, Customer customer)
{
    ...
}

public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
    var customerRepository = context.HttpContext.RequestServices.GetService<ICustomerRepository>();

    var authHeader = context.HttpContext.Request?.Headers["Authorization"].ToString();

    if (!Int32.TryParse(authHeader, out int clientId))
    {
        context.Result = new UnauthorizedResult();
    }

    var customer = await customerRepository.GetAsync(x => x.CustomerId == clientId, typeof(Application).Name);

    if (customer == null)
    {
        context.Result = new UnauthorizedResult();
    }

    context.ActionArguments["Customer"] = customer;

    await next(); 
}