最正确的方法是创建一个继承 ActionFilterAttribute 并覆盖 OnActionExecuting 方法的类。然后可以在 Global.asax.cs 的 GlobalFilters 中进行注册

当然，这将只拦截实际具有路由的请求。

您可以使用HttpModule来完成此任务。以下是我用来计算所有请求的处理时间的示例：

using System;
using System.Diagnostics;
using System.Web;
namespace Sample.HttpModules
    public class PerformanceMonitorModule : IHttpModule
        public void Init(HttpApplication httpApp)
            httpApp.BeginRequest += OnBeginRequest;
            httpApp.EndRequest += OnEndRequest;
            httpApp.PreSendRequestHeaders += OnHeaderSent;
        public void OnHeaderSent(object sender, EventArgs e)
            var httpApp = (HttpApplication)sender;
            httpApp.Context.Items["HeadersSent"] = true;
        // Record the time of the begin request event.
        public void OnBeginRequest(Object sender, EventArgs e)
            var httpApp = (HttpApplication)sender;
            if (httpApp.Request.Path.StartsWith("/media/")) return;
            var timer = new Stopwatch();
            httpApp.Context.Items["Timer"] = timer;
            httpApp.Context.Items["HeadersSent"] = false;
            timer.Start();
        public void OnEndRequest(Object sender, EventArgs e)
            var httpApp = (HttpApplication)sender;
            if (httpApp.Request.Path.StartsWith("/media/")) return;
            var timer = (Stopwatch)httpApp.Context.Items["Timer"];
            if (timer != null)
                timer.Stop();
                if (!(bool)httpApp.Context.Items["HeadersSent"])
                    httpApp.Context.Response.AppendHeader("ProcessTime",
                                                          ((double)timer.ElapsedTicks / Stopwatch.Frequency) * 1000 +
                                                          " ms.");
            httpApp.Context.Items.Remove("Timer");
            httpApp.Context.Items.Remove("HeadersSent");
        public void Dispose() { /* Not needed */ }
}

下面是在Web.Config中注册模块的方式：

<system.webServer>
    <modules runAllManagedModulesForAllRequests="true">