C# 如何将路由数据从ActionFilterAttribute传递到action方法？

如果会话已过期，我将使用

ActionFilterAttribute

将用户路由到登录视图，如下所示

现在，我想保留原始请求中的路由数据，以便在登录后将用户路由回该视图

如何将原始路线数据发送到

登录

操作方法

public class BaseController : Controller
{
    public int? BranchId {get => HttpContext.Session.GetInt32("BranchId") as int?;}
    public string Admin {get => HttpContext.Session.GetString("Admin") as string;}

    public BaseController() {}
}

public class AdminOrBranchesAccessAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext context)
    {
        base.OnActionExecuting(context);

        if ((context.Controller as BaseController).Admin == null &&
            (context.Controller as BaseController).BranchId == null)
        {
            context.Result = new RedirectToRouteResult(new RouteValueDictionary(new
            {
                controller = "Home",
                action = "Login"
            }));
        }
    }
}

[AdminOrBranchesAccess]
public async Task<IActionResult> Details(int? id)
{
    // Some stuff going on
    return View();
}

公共类BaseController:控制器
{
public int？BranchId{get=>HttpContext.Session.GetInt32（“BranchId”）作为int？；}
公共字符串Admin{get=>HttpContext.Session.GetString（“Admin”）作为字符串；}
公共BaseController（）{}
}
公共类管理员牧场访问属性：ActionFilterAttribute
{
公共重写无效OnActionExecuting（ActionExecutingContext上下文）
{
base.OnActionExecuting（上下文）；
if（（context.Controller作为BaseController）.Admin==null&&
（context.Controller作为BaseController）.BranchId==null）
{
context.Result=新的RedirectToRouteResult（新的RouteValueDictionary（新的
{
controller=“Home”，
action=“登录”
}));
}
}
}
[AdminOrBranchesAccess]
公共异步任务详细信息（int？id）
{
//发生了什么事
返回视图（）；
}

要在成功登录后重新选择上一个操作，您需要为登录操作提供返回url，并在

OnActionExecuting

中设置其值

使用参数

returnUrl

[HttpGet]
[AllowAnonymous]
public async Task<IActionResult> Login(string returnUrl = null)
{
    // Clear the existing external cookie to ensure a clean login process
    await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);

    ViewData["ReturnUrl"] = returnUrl;
    return View();
}

[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public async Task<IActionResult> Login(LoginViewModel model, string returnUrl = null)
{
    ViewData["ReturnUrl"] = returnUrl;
    if (ModelState.IsValid)
    {
        // This doesn't count login failures towards account lockout
        // To enable password failures to trigger account lockout, set lockoutOnFailure: true
        var result = await _signInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, lockoutOnFailure: true);
        if (result.Succeeded)
        {
            _logger.LogInformation("User logged in.");
            return RedirectToLocal(returnUrl);
        }
        if (result.RequiresTwoFactor)
        {
            return RedirectToAction(nameof(LoginWith2fa), new { returnUrl, model.RememberMe });
        }
        if (result.IsLockedOut)
        {
            _logger.LogWarning("User account locked out.");
            return RedirectToAction(nameof(Lockout));
        }
        else
        {
            ModelState.AddModelError(string.Empty, "Invalid login attempt.");
            return View(model);
        }
    }

    // If we got this far, something failed, redisplay form
    return View(model);
}

public class AdminOrBranchesAccessAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext context)
    {
        base.OnActionExecuting(context);

        if ((context.Controller as BaseController).Admin == null &&
            (context.Controller as BaseController).BranchId == null)
        {
            context.Result = new RedirectToRouteResult(new RouteValueDictionary(new
            {
                controller = "Home",
                action = "Login",
                returnUrl = context.HttpContext.Request.Path
            }));
        }
    }
}

---

如果要使用重定向，则必须将该数据存储在会话中，或者将其返回给客户端，并让客户端在下一个请求时将其发送回。这是HTTP限制，不是MVC限制。@KennethK。如何在会话中存储它？是否有某种方法可以在一个地方为整个应用程序执行此操作，或者我必须在每个控制器方法中执行此操作？我无权访问

OnActionExecuting

-类中的

HttpContext

。