【Q.Lee.lulu】ASP.NET MVC: 修改ViewLocator来动态切换模板

在这里简单给大家说下如何实现，只要给大家提供一点思路。其实把框架研究透彻了，真的很多问题都迎刃而解。

大家如果有看过我的上篇文章ASP.NET MVC : 实现我们自己的视图引擎，其实就明白的了。

在这里，首先我们需要一个配置文件来配置站点要使用的模板(主题)。

Config/Site.config :

<?xml version="1.0" encoding="utf-8"?><site><appsettingViewTheme="Default"/></site>

然后修改默认的ViewLocator  ：

public class uLinkViewLocator : ViewLocator
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        public uLinkViewLocator()ITPUB个人空间]^j5E(y
        {
*q(H)sBw2n]!qq3M7r.g0            base.ViewLocationFormats = new string[] { BaseviewPath + "/{1}/{0}.aspx",ITPUB个人空间Z!Q.m@kh/R
                                                      BaseviewPath + "/{1}/{0}.aspx",ITPUB个人空间 L3e%iuFY$|g%N
                                                      BaseviewPath + "/Shared/{0}.aspx",
|miS+A#x0                                                      BaseviewPath + "/Shared/{0}.aspx",
Y5ZPl_4CK5U0                                                      "~/Views/{1}/{0}.aspx",
7VHeI#^Xn0                                                      "~/Views/{1}/{0}.aspx",ITPUB个人空间W6n2L6I0L#HV
                                                      "~/Views/Shared/{0}.aspx",
4~+vX/SEDH0                                                      "~/Views/Shared/{0}.aspx"ITPUB个人空间*_7A	E:X8aP*}'i#Mf
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            };
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        private string _baseviewPath;
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            get
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                {
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c+@~!nj z{,B0                    viewTheme = string.IsNullOrEmpty(viewTheme) ? "Default" : viewTheme;
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G\'W7cHK0                    _baseviewPath = "~/Views/" + viewTheme;
}
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                return _baseviewPath;ITPUB个人空间}P6L-IVe;q9c:v#`?
            }

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FI'~xTWr'e0        private XElement configXml;
~	F2Mp ?0        private string path = System.Web.HttpRuntime.AppDomainAppPath + "/Config/Site.config";

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$}/R2rf.k+q!S0        /// 加载XML文件
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GM+AM4`r;]/L0        private XElement ConfigXml
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            {
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                return configXml;
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E*Q1`ve0    } 

还有修改ViewEngine的ViewLocator 为刚才创建的uLinkViewLocator ：

public class uLinkViewEngine : WebFormViewEngine
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        protected override void RenderView(ViewContext viewContext)

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            base.RenderView(viewContext);
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k0        public IViewLocator ViewLocator
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 Eg)OY,M$Up_@I0            getITPUB个人空间-O$sa2qg1h?.{&|q%t,t
            {
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                    this._viewLocator = new uLinkViewLocator();

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            }
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                this._viewLocator = value;ITPUB个人空间 p	c,p,k	Mc8MI4F
            }
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然后创建一个ControllerFactory继承自默认的DefaultControllerFactory，以修改默认的controller中的ViewEngine为我们创建的uLinkViewEngine ：

public class uLinkControllerFactory : DefaultControllerFactory
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            Controller controller = (Controller)base.CreateController(requestContext, controllerName);
(hgl$J%dn'K4R0            controller.ViewEngine = new uLinkViewEngine();//修改默认的视图引擎为我们刚才创建的视图引擎ITPUB个人空间{2DjGO9o
            return controller;
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    }

在Global.asax.cs中的Application_Start 事件中注册我们的 uLinkControllerFactory ：

ControllerBuilder.Current.SetControllerFactory(typeof(uLinkControllerFactory));

然后在写一个设置模板的Controller：

ThemeController
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   {
'|yK}*H4C0       privateXElement configXml;ITPUB个人空间K;{8`|tD&e
       private stringpath=System.Web.HttpRuntime.AppDomainAppPath+ "/Config/Site.config";ITPUB个人空间0~(N!Oy.fYL
       /**//// <summary>ITPUB个人空间
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       ///加载XML文件

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               if(configXml== null)
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                    configXml=XElement.Load(path);ITPUB个人空间!jN7@t8b@bq
                }
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y']3qx'X0               returnconfigXml;
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       publicActionResult Index()
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           throw newNotImplementedException();
6kB$O*X*UjeQ0        }
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"RTAmPH@$C0       publicActionResult ChangeTheme(stringid)ITPUB个人空间)M	w{A}