在 MVC、C# 中的每个请求中运行一个方法？
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Run a method in each request in MVC, C#?
提问by Mohammad Dayyan
In WebForm we could write a method in MasterPage.cs and it ran in each request .
e.g:
在 WebForm 中，我们可以在 MasterPage.cs 中编写一个方法，它会在每个请求中运行。
例如：
MasterPage.cs
--------------
protected void Page_Load(object sender, EventArgs e)
{
CheckCookie();
}
How can we do something like this in MVC ?
我们如何在 MVC 中做这样的事情？
采纳答案by Darin Dimitrov
In ASP.NET MVC you could write a custom global action filter.
在 ASP.NET MVC 中，您可以编写自定义全局操作过滤器。
UPDATE:
更新：
As requested in the comments section here's an example of how such filter might look like:
根据评论部分的要求，这里有一个示例，说明此类过滤器的外观：
public class MyActionFilterAttribute : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var fooCookie = filterContext.HttpContext.Request.Cookies["foo"];
// TODO: do something with the foo cookie
}
}
If you want to perform authorization based on the value of the cookie, it would be more correct to implement the IAuthorizationFilterinterface:
如果想根据cookie的值进行授权，实现IAuthorizationFilter接口会更正确：
public class MyActionFilterAttribute : FilterAttribute, IAuthorizationFilter
{
public void OnAuthorization(AuthorizationContext filterContext)
{
var fooCookie = filterContext.HttpContext.Request.Cookies["foo"];
if (fooCookie == null || fooCookie.Value != "foo bar")
{
filterContext.Result = new HttpUnauthorizedResult();
}
}
}
If you want this action filter to run on each request for each controller action you could register it as a global action filter in your global.asax in the RegisterGlobalFiltersmethod:
如果您希望此操作过滤器在每个控制器操作的每个请求上运行，您可以在 global.asaxRegisterGlobalFilters方法中将其注册为全局操作过滤器：
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleErrorAttribute());
filters.Add(new MyActionFilterAttribute());
}
And if you need this to execute only for particular actions or controllers simply decorate them with this attribute:
如果您只需要对特定操作或控制器执行此操作，只需使用此属性装饰它们：
[MyActionFilter]
public ActionResult SomeAction()
{
...
}
回答by ionden
You could use Global.asax Application_AcquireRequestStatemethod which will get called on every request:
您可以使用 Global.asaxApplication_AcquireRequestState方法，该方法将在每个请求中调用：
protected void Application_AcquireRequestState(object sender, EventArgs e)
{
//...
}
