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   源码介绍

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using System;
using System.Collections;
using System.IO;
using System.Web.Mvc;
using Commons.Collections;
using NVelocity;
using NVelocity.App;
using NVelocity.Runtime;
using System.Web;
using NVelocity.Runtime.Resource.Loader;

namespace NVelocityEngine
{
    public class FileResourceLoaderEx : FileResourceLoader
    {
        public FileResourceLoaderEx() : base() { }
        private Stream FindTemplate(string filePath)
        {
            try
            {
                FileInfo file = new FileInfo(filePath);
                return new BufferedStream(file.OpenRead());
            }
            catch (Exception exception)
            {
                base.runtimeServices.Debug(string.Format("FileResourceLoader : {0}", exception.Message));
                return null;
            }
        }


        public override long GetLastModified(global::NVelocity.Runtime.Resource.Resource resource)
        {
            if (File.Exists(resource.Name))
            {
                FileInfo file = new FileInfo(resource.Name);
                return file.LastWriteTime.Ticks;
            }
            return base.GetLastModified(resource);
        }
        public override Stream GetResourceStream(string templateName)
        {
            if (File.Exists(templateName))
            {
                return FindTemplate(templateName);
            }
            return base.GetResourceStream(templateName);
        }
        public override bool IsSourceModified(global::NVelocity.Runtime.Resource.Resource resource)
        {
            if (File.Exists(resource.Name))
            {
                FileInfo file = new FileInfo(resource.Name);
                return (!file.Exists || (file.LastWriteTime.Ticks != resource.LastModified));
            }
            return base.IsSourceModified(resource);
        }
    }
    public class NVelocityViewEngine : VirtualPathProviderViewEngine, IViewEngine
    {
        public static NVelocityViewEngine Default = null;

        private static readonly IDictionary DEFAULT_PROPERTIES = new Hashtable();
        private readonly VelocityEngine _engine;

        static NVelocityViewEngine()
        {
            string targetViewFolder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "views");
            //DEFAULT_PROPERTIES.Add(RuntimeConstants.RESOURCE_LOADER, "file");
            DEFAULT_PROPERTIES.Add(RuntimeConstants.FILE_RESOURCE_LOADER_PATH, targetViewFolder);
            DEFAULT_PROPERTIES.Add("file.resource.loader.class", "NVelocityEngine.FileResourceLoaderEx\\,NVelocityEngine");


            Default = new NVelocityViewEngine();
        }

        public NVelocityViewEngine()
            : this(DEFAULT_PROPERTIES)
        {
        }

        public NVelocityViewEngine(IDictionary properties)
        {
            base.MasterLocationFormats = new string[] { "~/Views/{1}/{0}.vm", "~/Views/Shared/{0}.vm" };
            base.AreaMasterLocationFormats = new string[] { "~/Areas/{2}/Views/{1}/{0}.vm", "~/Areas/{2}/Views/Shared/{0}.vm" };
            base.ViewLocationFormats = new string[] { "~/Views/{1}/{0}.vm", "~/Views/Shared/{0}.vm" };
            base.AreaViewLocationFormats = new string[] { "~/Areas/{2}/Views/{1}/{0}.vm", "~/Areas/{2}/Views/Shared/{0}.vm" };
            base.PartialViewLocationFormats = base.ViewLocationFormats;
            base.AreaPartialViewLocationFormats = base.AreaViewLocationFormats;
            base.FileExtensions = new string[] { "vm" };


            if (properties == null) properties = DEFAULT_PROPERTIES;

            ExtendedProperties props = new ExtendedProperties();
            foreach (string key in properties.Keys)
            {
                props.AddProperty(key, properties[key]);
            }

            _engine = new VelocityEngine();
            _engine.Init(props);
        }

        protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
        {
            Template viewTemplate = GetTemplate(viewPath);
            Template masterTemplate = GetTemplate(masterPath);
            NVelocityView view = new NVelocityView(controllerContext, viewTemplate, masterTemplate);
            return view;
        }
        protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)
        {
            Template viewTemplate = GetTemplate(partialPath);
            NVelocityView view = new NVelocityView(controllerContext, viewTemplate, null);
            return view;
        }
        public Template GetTemplate(string viewPath)
        {
            if (string.IsNullOrEmpty(viewPath))
            {
                return null;
            }
            return _engine.GetTemplate(System.Web.Hosting.HostingEnvironment.MapPath(viewPath));
        }
        
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

using NVelocityEngine;
namespace NVelocityWeb
{
    // Note: For instructions on enabling IIS6 or IIS7 classic mode, 
    // visit http://go.microsoft.com/?LinkId=9394801

    public class MvcApplication : System.Web.HttpApplication
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new HandleErrorAttribute());
        }

        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );

        }

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);

            ViewEngines.Engines.Add(NVelocityViewEngine.Default);

        }
    }
}