小编Art*_*tem的帖子

我有一个Web API方法:

public List<Task> GetTasks([FromUri] TaskFilter filter)
{

}

该方法具有带可空标识符列表的参数:

public class TaskFilter
{
  public IList<int?> Assignees { get; set; }
}

我打电话的时候:

GET /tasks?assignees=null

服务器返回错误:

{
  "message":"The request is invalid.",
  "modelState": {
    "assignees": [ "The value 'null' is not valid for Nullable`1." ]
  }
}

它只有在我传递空字符串时才有效:

GET /tasks?assignees=

但是标准查询字符串转换器(来自JQuery, Angular等)不能以这种方式使用空值.

如何让ASP.NET解释'null'为null？

Upd:查询字符串可以包含多个标识符,例如:

GET /tasks?assignees=1&assignees=2&assignees=null

Upd2: JQuery将数组中的空值转换为空字符串,ASP.NET将它们解释为null.所以问题是从Angular 1.6($HttpParamSerializerProvider)调用WebAPI

Upd3:我知道解决方法,但我没有要求它们.我想要一个特定问题的解决方案:

• 这是一种GET方法
• 方法接受来自Uri的列表
• 列表可以包含null值
• 这应该是List<int?>因为API文档是自动生成的,我不希望将文本数组视为参数类型
• 默认情况下,ASP.NET期望空字符串为空值(JQuery.param …

我配置了Identity Server:

public void Configuration(IAppBuilder app)
{
    var factory = new IdentityServerServiceFactory().UseInMemoryClients(new Client[] {
        new Client()
        {
            ClientName = "MyClient",
            ClientId = "MyClientId",
            Enabled = true,
            Flow = Flows.Implicit,
            RedirectUris = new List<string> { "MyClientServer/callback" },
        };
    });
}

和客户端服务器:

public void Configuration(IAppBuilder app)
{
    var cookieOptions = new CookieAuthenticationOptions();
    cookieOptions.AuthenticationType = "Cookies";
    app.UseCookieAuthentication(cookieOptions);

    var authenticationOptions = new OpenIdConnectAuthenticationOptions() {
        Authority = "https://MyIdentityServer/core",
        ClientId = "MyClientId",
        SignInAsAuthenticationType = "Cookies",
        UseTokenLifetime = true,
        RedirectUri = "MyClientServer/callback"
    });

    app.UseOpenIdConnectAuthentication(authenticationOptions);
}

当用户使用"记住我"选项登录时,身份cookie已过期日期:

idsvr.session …

我有一个代码来获取与之相关的书籍和借书卡：

// mimic http requests
const fetchBook = (bookId: number) => {
    const title = 'Book' + bookId;
    return timer(200).pipe(mapTo({ bookId, title }));
}
const fetchLibraryCard = (bookId: number) => {
    const borrowerName = 'Borrower of Book' + bookId;
    return timer(300).pipe(mapTo({ borrowerName }));
}

const bookId$ = new Subject<number>();

const book$ = bookId$.pipe(
    switchMap(bookId => fetchBook(bookId)),
    shareReplay(1)
);

// e.g. 'Refresh library card' button
const libraryCardUpdater$ = new BehaviorSubject<void>(undefined);

const libraryCard$ = combineLatest([bookId$, libraryCardUpdater$]).pipe(
    switchMap(([bookId]) => fetchLibraryCard(bookId)),
    shareReplay(1)
);

combineLatest([book$, …