blocks|key|607083|text|您可以编写一个标记属性：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|607084|public+class+SkipMyGlobalActionFilterAttribute+:+Attribute
{
}|code-block|syntax|javascript|607085|然后在全局操作筛选器测试中，检查操作上是否存在此标记：|607086|public+class+MyGlobalActionFilter+:+ActionFilterAttribute
{
++++public+override+void+OnActionExecuting(ActionExecutingContext+filterContext)
++++{
++++++++if+(filterContext.ActionDescriptor.GetCustomAttributes(typeof(SkipMyGlobalActionFilterAttribute),+false).Any())
++++++++{
++++++++++++return;
++++++++}

++++++++//+here+do+whatever+you+were+intending+to+do
++++}
}|607087|然后，如果您想从全局过滤器中排除某些操作，只需使用标记属性对其进行修饰：|607088|[SkipMyGlobalActionFilter]
public+ActionResult+Index()
{
++++return+View();
}|607089|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You could write a marker attribute:

<pre><code>public class SkipMyGlobalActionFilterAttribute : Attribute
{
}
</code></pre>

and then in your global action filter test for the presence of this marker on the action:

<pre><code>public class MyGlobalActionFilter : ActionFilterAttribute
{
 public override void OnActionExecuting(ActionExecutingContext filterContext)
 {
 if (filterContext.ActionDescriptor.GetCustomAttributes(typeof(SkipMyGlobalActionFilterAttribute), false).Any())
 {
 return;
 }

 // here do whatever you were intending to do
 }
}
</code></pre>

and then if you want to exclude some action from the global filter simply decorate it with the marker attribute:

<pre><code>[SkipMyGlobalActionFilter]
public ActionResult Index()
{
 return View();
}
</code></pre>

blocks|key|607142|text|您可以像这样更改筛选器代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|607143|+public+class+NHibernateActionFilter+:+ActionFilterAttribute
++++{
++++++++public+IEnumerable<string>+ActionsToSkip+{+get;+set;+}

++++++++public+NHibernateActionFilter(params+string[]+actionsToSkip)
++++++++{
++++++++++++ActionsToSkip+=+actionsToSkip;
++++++++}

++++++++public+override+void+OnActionExecuting(ActionExecutingContext+filterContext)
++++++++{
++++++++++++if+(null+!=+ActionsToSkip+&&+ActionsToSkip.Any(a+=>+
String.Compare(a,++filterContext.ActionDescriptor.ActionName,+true)+==+0))
++++++++++++++++{
++++++++++++++++++++return;
++++++++++++++++}
+++++++++++//here+you+code
++++++++}
++++}|code-block|syntax|javascript|607144|并使用它：|607145|[NHibernateActionFilter(new[]+{+"SkipFilterAction1+",+"Action2"})]|607146|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can change your filter code like this:

<pre><code> public class NHibernateActionFilter : ActionFilterAttribute
 {
 public IEnumerable&lt;string&gt; ActionsToSkip { get; set; }

 public NHibernateActionFilter(params string[] actionsToSkip)
 {
 ActionsToSkip = actionsToSkip;
 }

 public override void OnActionExecuting(ActionExecutingContext filterContext)
 {
 if (null != ActionsToSkip &amp;&amp; ActionsToSkip.Any(a =&gt; 
String.Compare(a, filterContext.ActionDescriptor.ActionName, true) == 0))
 {
 return;
 }
 //here you code
 }
 }
</code></pre>

And use it:

<pre><code>[NHibernateActionFilter(new[] { "SkipFilterAction1 ", "Action2"})]
</code></pre>

blocks|key|607194|text|创建自定义筛选器提供程序。编写一个实现IFilterProvider的类。这个IFilterProvider接口有一个GetFilters方法，它返回需要执行的过滤器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|607195|public+class+MyFilterProvider+:+IFilterProvider
{
++++++++private+readonly+List<Func<ControllerContext,+object>>+filterconditions+=+new+List<Func<ControllerContext,+object>>();
++++++++public+void+Add(Func<ControllerContext,+object>+mycondition)
++++++++{
++++++++++++filterconditions.Add(mycondition);
++++++++}

++++++++public+IEnumerable<Filter>+GetFilters(ControllerContext+controllerContext,+ActionDescriptor+actionDescriptor)
++++++++{
++++++++++++return+from+filtercondition+in+filterconditions
+++++++++++++++++++select+filtercondition(controllerContext)+into+ctrlContext
+++++++++++++++++++where+ctrlContext!=+null
+++++++++++++++++++select+new+Filter(ctrlContext,+FilterScope.Global);
++++++++}
}|code-block|syntax|javascript|607196|=============================================================================|607197|在Global.asax.cs中|607198|public+static+void+RegisterGlobalFilters(GlobalFilterCollection+filters)
++++++++{
++++++++++++MyFilterProvider+provider+=+new+MyFilterProvider();
++++++++++++provider.Add(d+=>+d.RouteData.Values["action"].ToString()+!=+"SkipFilterAction1+"+?+new+NHibernateActionFilter()+:+null);
++++++++++++FilterProviders.Providers.Add(provider);
++++++++}


protected+void+Application_Start()
{
++++RegisterGlobalFilters(GlobalFilters.Filters);
}|607199|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Create a custom Filter Provider. Write a class which will implement IFilterProvider. This IFilterProvider interface has a method GetFilters which returns Filters which needs to be executed.

<pre><code>public class MyFilterProvider : IFilterProvider
{
 private readonly List&lt;Func&lt;ControllerContext, object&gt;&gt; filterconditions = new List&lt;Func&lt;ControllerContext, object&gt;&gt;();
 public void Add(Func&lt;ControllerContext, object&gt; mycondition)
 {
 filterconditions.Add(mycondition);
 }

 public IEnumerable&lt;Filter&gt; GetFilters(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
 {
 return from filtercondition in filterconditions
 select filtercondition(controllerContext) into ctrlContext
 where ctrlContext!= null
 select new Filter(ctrlContext, FilterScope.Global);
 }
}
</code></pre>

============================================================================= 
In Global.asax.cs

<pre><code>public static void RegisterGlobalFilters(GlobalFilterCollection filters)
 {
 MyFilterProvider provider = new MyFilterProvider();
 provider.Add(d =&gt; d.RouteData.Values["action"].ToString() != "SkipFilterAction1 " ? new NHibernateActionFilter() : null);
 FilterProviders.Providers.Add(provider);
 }


protected void Application_Start()
{
 RegisterGlobalFilters(GlobalFilters.Filters);
}
</code></pre>

blocks|key|607242|text|好的，我想我在ASP.NET核心上工作得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|607243|代码如下：|607244|public+override+async+Task+OnActionExecutionAsync(ActionExecutingContext+context,+ActionExecutionDelegate+next)
++++{
++++++++//+Prepare+the+audit
++++++++_parameters+=+context.ActionArguments;

++++++++await+next();

++++++++if+(IsExcluded(context))
++++++++{
++++++++++++return;
++++++++}

++++++++var+routeData+=+context.RouteData;

++++++++var+controllerName+=+(string)routeData.Values["controller"];
++++++++var+actionName+=+(string)routeData.Values["action"];

++++++++//+Log+action+data
++++++++var+auditEntry+=+new+AuditEntry
++++++++{
++++++++++++ActionName+=+actionName,
++++++++++++EntityType+=+controllerName,
++++++++++++EntityID+=+GetEntityId(),
++++++++++++PerformedAt+=+DateTime.Now,
++++++++++++PersonID+=+context.HttpContext.Session.GetCurrentUser()?.PersonId.ToString()
++++++++};

++++++++_auditHandler.DbContext.Audits.Add(auditEntry);
++++++++await+_auditHandler.DbContext.SaveChangesAsync();
++++}

++++private+bool+IsExcluded(ActionContext+context)
++++{
++++++++var+controllerActionDescriptor+=+(Microsoft.AspNetCore.Mvc.Controllers.ControllerActionDescriptor)context.ActionDescriptor;

++++++++return+controllerActionDescriptor.ControllerTypeInfo.IsDefined(typeof(ExcludeFromAuditing),+false)+%7C%7C
+++++++++++++++controllerActionDescriptor.MethodInfo.IsDefined(typeof(ExcludeFromAuditing),+false);
++++}|code-block|syntax|javascript|607245|相关代码在'IsExcluded‘方法中。|607246|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Well, I think I got it working for ASP.NET Core. 
Here's the code: 

<pre><code>public override async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
 {
 // Prepare the audit
 _parameters = context.ActionArguments;

 await next();

 if (IsExcluded(context))
 {
 return;
 }

 var routeData = context.RouteData;

 var controllerName = (string)routeData.Values["controller"];
 var actionName = (string)routeData.Values["action"];

 // Log action data
 var auditEntry = new AuditEntry
 {
 ActionName = actionName,
 EntityType = controllerName,
 EntityID = GetEntityId(),
 PerformedAt = DateTime.Now,
 PersonID = context.HttpContext.Session.GetCurrentUser()?.PersonId.ToString()
 };

 _auditHandler.DbContext.Audits.Add(auditEntry);
 await _auditHandler.DbContext.SaveChangesAsync();
 }

 private bool IsExcluded(ActionContext context)
 {
 var controllerActionDescriptor = (Microsoft.AspNetCore.Mvc.Controllers.ControllerActionDescriptor)context.ActionDescriptor;

 return controllerActionDescriptor.ControllerTypeInfo.IsDefined(typeof(ExcludeFromAuditing), false) ||
 controllerActionDescriptor.MethodInfo.IsDefined(typeof(ExcludeFromAuditing), false);
 }
</code></pre>

The relevant code is in the 'IsExcluded' method.

blocks|key|607298|text|虽然，Darin+Dimitrov的公认答案很好，而且效果很好，但对我来说，最简单、最有效的答案是here。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|607299|你只需要在你的属性中添加一个布尔属性，并在你的逻辑开始之前对其进行检查：|607300|public+class+DataAccessAttribute:+ActionFilterAttribute
{
++++public+bool+Disable+{+get;+set;+}

++++public+override+void+OnActionExecuting(ActionExecutingContext+filterContext)
++++{
++++++++if+(Disable)+return;

++++++++//+Your+original+logic+for+your+95%25+actions+goes+here.
++++}
}|code-block|syntax|javascript|607301|然后，在你的5%25行动中，就像这样使用它：|607302|[DataAccessAttribute(Disable=true)]
public+ActionResult+Index()
{++++++++++++
++++return+View();
}|607303|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/5600583/1541152^0|1D|4|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

Though, the accepted answer by Darin Dimitrov is fine and working well but, for me, the simplest and most efficient answer found <a href="https://stackoverflow.com/a/5600583/1541152">here</a>.
You just need to add a boolean property to your attribute and check against it, just before your logic begins:
<pre><code>public class DataAccessAttribute: ActionFilterAttribute
{
 public bool Disable { get; set; }

 public override void OnActionExecuting(ActionExecutingContext filterContext)
 {
 if (Disable) return;

 // Your original logic for your 95% actions goes here.
 }
}
</code></pre>
Then at your 5% actions just use it like this:
<pre><code>[DataAccessAttribute(Disable=true)]
public ActionResult Index()
{ 
 return View();
}
</code></pre>

blocks|key|391154|text|在AspNetCore中，@darin-dimitrov接受的答案可以修改为如下工作方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|391155|首先，在标记属性上实现IFilterMetadata：|offset|length|style|CODE|391156|public+class+SkipMyGlobalActionFilterAttribute+:+Attribute,+IFilterMetadata
{
}|code-block|syntax|javascript|391157|然后在ActionExecutingContext上搜索此属性的Filters属性|391158|public+class+MyGlobalActionFilter+:+IActionFilter
{
++++public+override+void+OnActionExecuting(ActionExecutingContext+context)
++++{
++++++++if+(context.Filters.OfType<SkipMyGlobalActionFilterAttribute>().Any())
++++++++{
++++++++++++return;
++++++++}

++++++++//+etc
++++}
}|391159|entityMap^0|0|B|F|0|0|3|M|W|7|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]]|9|@]|A|$]]|$1|O|3|P|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|Q|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|R|$]]

In AspNetCore, the accepted answer by @darin-dimitrov can be adapted to work as follows:

First, implement <code>IFilterMetadata</code> on the marker attribute:

<pre><code>public class SkipMyGlobalActionFilterAttribute : Attribute, IFilterMetadata
{
}
</code></pre>

Then search the <code>Filters</code> property for this attribute on the <code>ActionExecutingContext</code>:

<pre><code>public class MyGlobalActionFilter : IActionFilter
{
 public override void OnActionExecuting(ActionExecutingContext context)
 {
 if (context.Filters.OfType&lt;SkipMyGlobalActionFilterAttribute&gt;().Any())
 {
 return;
 }

 // etc
 }
}
</code></pre>

I have set up a global filter for all my controller actions in which I open and close NHibernate sessions. 95% of these action need some database access, but 5% don't. Is there any easy way to disable this global filter for those 5%. I could go the other way round and decorate only the actions that need the database, but that would be far more work.

How to disable a global filter in ASP.Net MVC selectively

数据库

我已经为打开和关闭NHibernate会话的所有控制器操作设置了一个全局筛选器。其中95%的操作需要一些数据库访问，但5%不需要。有什么简单的方法可以禁用这5%的全局过滤器吗？我可以反过来，只修饰需要数据库的操作，但这将是更多的工作。

问如何在ASP.Net MVC中有选择地禁用全局过滤器
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