blocks|key|952503|text|尝试下面的代码片段，它应该非常清楚：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|952504|public+class+AuthorizeActionFilterAttribute+:+ActionFilterAttribute
{
++public+override+void+OnActionExecuting(FilterExecutingContext+filterContext)
++{
++++HttpSessionStateBase+session+=+filterContext.HttpContext.Session;
++++Controller+controller+=+filterContext.Controller+as+Controller;

++++if+(controller+!=+null)
++++{
++++++if+(session["Login"]+==+null)
++++++{
++++++++filterContext.Cancel+=+true;
++++++++controller.HttpContext.Response.Redirect("./Login");
++++++}
++++}

++++base.OnActionExecuting(filterContext);
++}
}|code-block|syntax|javascript|952505|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try the following snippet, it should be pretty clear:

<pre><code>public class AuthorizeActionFilterAttribute : ActionFilterAttribute
{
 public override void OnActionExecuting(FilterExecutingContext filterContext)
 {
 HttpSessionStateBase session = filterContext.HttpContext.Session;
 Controller controller = filterContext.Controller as Controller;

 if (controller != null)
 {
 if (session["Login"] == null)
 {
 filterContext.Cancel = true;
 controller.HttpContext.Response.Redirect("./Login");
 }
 }

 base.OnActionExecuting(filterContext);
 }
}
</code></pre>

blocks|key|952575|text|您可以继承您的控制器，然后在您的操作过滤器中使用它|type|unstyled|depth|inlineStyleRanges|entityRanges|data|952576|在您的ActionFilterAttribute类中：|952577|+++if(+filterContext.Controller+is+MyController+)
++++++if(filterContext.HttpContext.Session["login"]+==+null)
+++++++++++(filterContext.Controller+as+MyController).RedirectToAction("Login");|code-block|syntax|javascript|952578|在你的基本控制器中：|952579|public+class+MyController+:+Controller+
{
++++public+void++RedirectToAction(string+actionName)+{+
++++++++base.RedirectToAction(actionName);+
++++}
}|952580|缺点。其中之一是将所有控制器更改为从"MyController“类继承|952581|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

you could inherit your controller then use it inside your action filter 

inside your ActionFilterAttribute class: 

<pre><code> if( filterContext.Controller is MyController )
 if(filterContext.HttpContext.Session["login"] == null)
 (filterContext.Controller as MyController).RedirectToAction("Login");
</code></pre>

inside your base controller: 

<pre><code>public class MyController : Controller 
{
 public void RedirectToAction(string actionName) { 
 base.RedirectToAction(actionName); 
 }
}
</code></pre>

Cons. of this is to change all controllers to inherit from "MyController" class

blocks|key|736521|text|作为重定向的替代方法，如果它调用您自己的代码，您可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|736522|actionContext.Result+=+new+RedirectToRouteResult(
++++new+RouteValueDictionary(new+{+controller+=+"Home",+action+=+"Error"+})
);

actionContext.Result.ExecuteResult(actionContext.Controller.ControllerContext);|code-block|syntax|javascript|736523|它不是纯粹的重定向，但在没有不必要的开销的情况下产生了类似的结果。|736524|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Alternatively to a redirect, if it is calling your own code, you could use this:

<pre><code>actionContext.Result = new RedirectToRouteResult(
 new RouteValueDictionary(new { controller = "Home", action = "Error" })
);

actionContext.Result.ExecuteResult(actionContext.Controller.ControllerContext);
</code></pre>

It is not a pure redirect but gives a similar result without unnecessary overhead.

blocks|key|952660|text|这里有一个解决方案，如果您使用Ajax请求，也要考虑这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|952661|using+System;
using+System.Web.Mvc;
using+System.Web.Routing;

namespace+YourNamespace{++++++++
++++[AttributeUsage(AttributeTargets.Class+%7C+AttributeTargets.Method,+Inherited+=+true,+AllowMultiple+=+true)]
++++public+class+AuthorizeCustom+:+ActionFilterAttribute+{
++++++++public+override+void+OnActionExecuting(ActionExecutingContext+context)+{
++++++++++++if+(YourAuthorizationCheckGoesHere)+{+++++++++++++++
++++++++++++++++string+area+=+"";//+leave+empty+if+not+using+area's
++++++++++++++++string+controller+=+"ControllerName";
++++++++++++++++string+action+=+"ActionName";
++++++++++++++++var+urlHelper+=+new+UrlHelper(context.RequestContext);++++++++++++++++++
++++++++++++++++if+(context.HttpContext.Request.IsAjaxRequest()){+//+Check+if+Ajax
++++++++++++++++++++if(area+==+string.Empty)
++++++++++++++++++++++++context.HttpContext.Response.Write($"<script>window.location.reload('{urlHelper.Content(System.IO.Path.Combine(controller,+action))}');</script>");
++++++++++++++++++++else
++++++++++++++++++++++++context.HttpContext.Response.Write($"<script>window.location.reload('{urlHelper.Content(System.IO.Path.Combine(area,+controller,+action))}');</script>");
++++++++++++++++}+else+++//+Non+Ajax+Request++++++++++++++++++++++
++++++++++++++++++++context.Result+=+new+RedirectToRouteResult(new+RouteValueDictionary(+new{+area,+controller,+action+}));+++++++++++++
++++++++++++}
++++++++++++base.OnActionExecuting(context);
++++++++}
++++}
}|code-block|syntax|javascript|952662|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is a solution that also takes in account if you are using Ajax requests. 

<pre><code>using System;
using System.Web.Mvc;
using System.Web.Routing;

namespace YourNamespace{ 
 [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = true)]
 public class AuthorizeCustom : ActionFilterAttribute {
 public override void OnActionExecuting(ActionExecutingContext context) {
 if (YourAuthorizationCheckGoesHere) { 
 string area = "";// leave empty if not using area's
 string controller = "ControllerName";
 string action = "ActionName";
 var urlHelper = new UrlHelper(context.RequestContext); 
 if (context.HttpContext.Request.IsAjaxRequest()){ // Check if Ajax
 if(area == string.Empty)
 context.HttpContext.Response.Write($"&lt;script&gt;window.location.reload('{urlHelper.Content(System.IO.Path.Combine(controller, action))}');&lt;/script&gt;");
 else
 context.HttpContext.Response.Write($"&lt;script&gt;window.location.reload('{urlHelper.Content(System.IO.Path.Combine(area, controller, action))}');&lt;/script&gt;");
 } else // Non Ajax Request 
 context.Result = new RedirectToRouteResult(new RouteValueDictionary( new{ area, controller, action })); 
 }
 base.OnActionExecuting(context);
 }
 }
}
</code></pre>

blocks|key|952710|text|这对我很有效(asp.net+Core2.1)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|952711|using+JustRide.Web.Controllers;
using+Microsoft.AspNetCore.Mvc;
using+Microsoft.AspNetCore.Mvc.Filters;

namespace+MyProject.Web.Filters
{
++++public+class+IsAuthenticatedAttribute+:+ActionFilterAttribute
++++{
++++++++public+override+void+OnActionExecuting(ActionExecutingContext+context)
++++++++{
++++++++++++if+(context.HttpContext.User.Identity.IsAuthenticated)
++++++++++++++++context.Result+=+new+RedirectToActionResult(nameof(AccountController.Index),+"Account",+null);
++++++++}
++++}
}



[AllowAnonymous,+IsAuthenticated]
public+IActionResult+Index()
{
++++return+View();
}|code-block|syntax|javascript|952712|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This works for me (asp.net core 2.1)

<pre><code>using JustRide.Web.Controllers;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

namespace MyProject.Web.Filters
{
 public class IsAuthenticatedAttribute : ActionFilterAttribute
 {
 public override void OnActionExecuting(ActionExecutingContext context)
 {
 if (context.HttpContext.User.Identity.IsAuthenticated)
 context.Result = new RedirectToActionResult(nameof(AccountController.Index), "Account", null);
 }
 }
}



[AllowAnonymous, IsAuthenticated]
public IActionResult Index()
{
 return View();
}
</code></pre>

What is the best way to do a redirect in an <code>ActionFilterAttribute</code>. I have an <code>ActionFilterAttribute</code> called <code>IsAuthenticatedAttributeFilter</code> and that checked the value of a session variable. If the variable is false, I want the application to redirect to the login page. I would prefer to redirect using the route name <code>SystemLogin</code> however any redirect method at this point would be fine.

Redirect From Action Filter Attribute

路由

在ActionFilterAttribute中执行重定向的最佳方法是什么。我有一个名为IsAuthenticatedAttributeFilter的ActionFilterAttribute，它检查会话变量的值。如果变量为false，我希望应用程序重定向到登录页面。我更喜欢使用路由名称SystemLogin进行重定向，...

问从操作筛选器属性重定向
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问从操作筛选器属性重定向EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问从操作筛选器属性重定向
EN