ASP.NET 內核調試不適用於 OnGetAsync

Question

我的頁面 model 調用了一個執行查詢的方法。

// Retrieve financials
var details = await (from detail in dbContext.StorageDetails
                        where (detail.ArrivalDate != null && detail.ArrivalDate <= dateRange.EndDate &&
                        (detail.DepartureDate == null || detail.DepartureDate >= dateRange.StartDate)) ||
                        (detail.TakeOrPayStartDate != null && detail.TakeOrPayStartDate <= dateRange.EndDate &&
                        (detail.TakeOrPayEndDate == null || detail.TakeOrPayEndDate >= dateRange.StartDate))
                        orderby detail.Location.City, detail.Location.State, detail.ArrivalDate
                        select new
                        {
                            Location = new
                            {
                                Id = detail.LocationId,
                                detail.Location.Name,
                                detail.Location.City,
                                detail.Location.State
                            },
                            detail.RailcarNumber,
                            detail.TakeOrPayId,
                            detail.TakeOrPayStartDate,
                            detail.TakeOrPayEndDate,
                            detail.ArrivalDate,
                            detail.DepartureDate,
                            detail.CherryPickDate,
                            detail.DailyStorageRate,
                            detail.SwitchInRate,
                            detail.SwitchOutRate,
                            detail.CherryPickRate,
                            detail.DailyStorageCost,
                            detail.SwitchInCost,
                            detail.SwitchOutCost,
                            detail.CherryPickCost,
                        })
                        .ToListAsync();

我在此查詢的開頭設置了一個斷點。 當我跨過它時，我的代碼在我的頁面的 CSHTML 文件中停止，並抱怨保留此查詢結果的變量是null ！

如果我沒有跳過此查詢，而是步入其中，我發現自己正在逐步完成ApplicationDbContact.OnModelCreating() 。

我認為OnModelCreating()只是用於生成數據庫模式。 所以這對我來說根本沒有任何意義。

有沒有人可以在這里看到一些東西，或者我完全破壞了 ASP.NET 內核？ 任何人將如何開始解決這樣的問題？

這是我的頁面 model 處理程序。 上面的查詢在helper.GetFinancialsByLocation()中。

public async void OnGetAsync()
{
    DateTime date = DateTime.Today;
    DateRange = new DateRange
    {
        StartDate = new DateTime(date.Year, date.Month, 1),
    };
    DateRange.EndDate = DateRange.StartDate.AddMonths(1).AddMilliseconds(-1);

    try
    {
        FinancialsHelper helper = new FinancialsHelper();
        FinancialsLocations = await helper.GetFinancialsByLocation(DbContext, DateRange);
    }
    catch (Exception ex)
    {
        string s = ex.Message;
    }
}

這是我的startup.cs。

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(
                Configuration.GetConnectionString("DefaultConnection")));
        services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
            .AddEntityFrameworkStores<ApplicationDbContext>();
        services.AddRazorPages();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
            app.UseDatabaseErrorPage();
        }
        else
        {
            app.UseExceptionHandler("/Error");
            // 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.UseRouting();

        app.UseAuthentication();
        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapRazorPages();
        });
    }
}

Answer 1

根據您應該使用的文檔：

public async Task OnGetAsync()

而不是：

public async void OnGetAsync()