OpenIddict 控制台应用程序 - 获取所有应用程序客户端 - ListSync 失败

问题描述

我编写了一个简单的控制台应用程序来从 OpenIddict 服务器获取所有应用程序客户端。我尝试了所有的可能性并得到了语法错误。代码如下。我在 Github 中没有找到任何示例，并发现一些过时的示例（2017）现在不再相关。请帮忙

 public static async Task<bool> test()
 {
            var services = CreateServices();  
            var provider = services.BuildServiceProvider();
            var scope = provider.CreateScope();            
            var context = scope.ServiceProvider.GetrequiredService<CustomDbContext>();
            await context.Database.EnsureCreatedAsync();

            var manager = scope.ServiceProvider.GetrequiredService<IOpenIddictApplicationManager>();

            var result = await manager.FindByClientIdAsync("TestApp");   // It Works
            
            IQueryable<OpenIddictEntityFrameworkCoreApplication> _applicationsQuery = Enumerable.Empty<OpenIddictEntityFrameworkCoreApplication>().AsQueryable();
            _applicationsQuery.Where(apps => apps.ClientId != "");
                                  
            var clients = manager.ListAsync<Func<OpenIddictEntityFrameworkCoreApplication>>(_applicationsQuery);  //Compiler Error

            return (result != null);

}

       

private static IServiceCollection CreateServices()
{
            var services = new ServiceCollection();
            services.AddDbContext<CustomDbContext>(opts =>
            {
                opts.UsesqlServer(
                    ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString,b => b.MigrationsAssembly("Program"));
                opts.USEOpenIddict();
            });

            services.AddOpenIddict() // Register the OpenIddict core components.
                .AddCore(options =>
                {
                    // Configure OpenIddict to use the Entity Framework Core stores and models.
                    // Note: call ReplaceDefaultEntities() to replace the default OpenIddict entities.
                    options.UseEntityFrameworkCore()
                           .UseDbContext<CustomDbContext>();

                    // Enable Quartz.NET integration.
                    options.UseQuartz();
                });

            return services;
}

解决方法

ListAsync() 返回一个 IAsyncEnumerable<T> 集合，因此您可以使用 await foreach 来迭代集合：

await foreach (var application in manager.ListAsync())
{
    Console.WriteLine(await manager.GetClientIdAsync(application));
}

您还可以引用 System.Linq.Async 包并使用异步 LINQ 扩展。例如，您可以通过以下方式检索所有现有应用程序的所有客户端标识符：

var identifiers = await manager.ListAsync()
    .SelectAwait(application => manager.GetClientIdAsync(application))
    .ToListAsync();