了解.net mvc实现原理ActionResult/View

上一篇了解了请求至Controller的Action过程，这篇继续看源码处理Action收到请求数据再返回ActionResult到View的过程。
 本节要讨论的问题 
Action的传参过程 
ActionResult 
IView / IViewEngine / ViewEngineCollection / ViewEngineResult 
记得上篇反编译源看到Filter的执行顺序提到命名1，2，3的变量，在MVC3的源码中这个微软改掉了。 
AuthorizationContext authContext = InvokeAuthorizationFilters(controllerContext, filterInfo.AuthorizationFilters, actionDescriptor);ActionExecutedContext postActionContext = InvokeActionMethodWithFilters(controllerContext, filterInfo.ActionFilters, actionDescriptor, parameters);ExceptionContext exceptionContext = InvokeExceptionFilters(controllerContext, filterInfo.ExceptionFilters, ex);
一、Action的传参过程
我们在定义Action方法时常用的传参大致有这么几种，详细看代码注释
View Code 
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Web;using System.Web.Mvc;using System.ComponentModel;using Demo.Model;using Demo.Service.IService;namespace Demo.Mvc.Controller{    [HandleError]    public class MenuController:Core.BaseController    {        private IMenuService service;        public MenuController(IMenuService service)        {            this.service = service;        }                     public ActionResult Index()        {            return View();        }          [ActionName("ShowId")]        public ActionResult ShowId(string id)        {            return View(service.Get(id));        }        //UpdateModel 缺点失败会抛出异常 or TryUpdateModel方式会试转换时间整数等NULL字段        public ActionResult SaveModel(string name, string age)        {            var permisson = new INFRA_MENU_PERMISSION();            //UpdateModel<INFRA_MENU_PERMISSION>(permisson);            TryUpdateModel(permisson);            ViewData.Model = permisson;            return View();        }        //FormCollection 的方式         //可以绑定任意集合类型：IList<Book>, ICollection<Book>, IEnumerable<Book>, List<Book>, Book[] 字典        public ActionResult SaveModel(FormCollection formCollection)        {            INFRA_MENU_PERMISSION permisson = new INFRA_MENU_PERMISSION();            permisson.ACTION_NAME = formCollection["ACTION_NAME"];            permisson.CREATETIME = Convert.ToDateTime(formCollection["ACTION_NAME"]);            service.Update(permisson);            return RedirectToAction("Index");        }        //IModelBinder DefaultModelBinder将Request传递参数绑定到对象上        [OutputCache]        public ActionResult SaveModel(INFRA_MENU_PERMISSION permisson)        {            service.Update(permisson);            return RedirectToAction("Index");                     }        //不绑定哪些属性        public ActionResult SaveModelWithExclude([Bind(Exclude = "CONTROLLER_NAME")]INFRA_MENU_PERMISSION permisson)        {            service.Update(permisson);            return RedirectToAction("Index");        }        //绑定哪些属性        public ActionResult SaveModelWithInclude([Bind(Include = "CONTROLLER_NAME")]INFRA_MENU_PERMISSION permisson)        {            service.Update(permisson);            return RedirectToAction("Index");        }          }        } Action传参支持类型绑定，字典键，对象，集合等等。除了使用默认的绑定方式，还可以继承IModelBinder重写DefaultModelBinder。
自己实现一个ModelBinder的代码 以及处理绑定的Attribute （具体看代码注释），可以通过这种方式解决一些复杂对象的值绑定问题。
View Code 
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using System.ComponentModel;namespace Demo.Mvc.ExModelBinder{    //实现类似DefaultModelBinder 参照一下DefaultModelBinder源码重写个ModelBinder     //DefaultModelBinder 在MVC2和MVC3的源码是不同的，主要是ValueProvider这个字段 MVC2是字典个集合，MVC3是个策略模式    public class VOModelBinder : IModelBinder     {        #region IModelBinder 成员        public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)        {            object model = Activator.CreateInstance(bindingContext.ModelType);            PropertyDescriptorCollection col = TypeDescriptor.GetProperties(model);            foreach (PropertyDescriptor item in col)            {                //ValueProvider记录Request参数键值对                var result = bindingContext.ValueProvider.GetValue(item.Name);                if (result != null)                {                    var value = result.ConvertTo(item.PropertyType);                    item.SetValue(model, value);           &a

补充：Web开发 , ASP.Net ,

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