MVC视图引擎优化

 

 

请首先看如下内容：

未找到视图"Index"或其母版视图，或没有视图引擎支持搜索的位置。搜索了以下位置: 
~/Views/Home/Index.aspx
~/Views/Home/Index.ascx
~/Views/Shared/Index.aspx
~/Views/Shared/Index.ascx
~/Views/Home/Index.cshtml
~/Views/Home/Index.vbhtml
~/Views/Shared/Index.cshtml
~/Views/Shared/Index.vbhtml

 

 

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Mvc4和mvc3是这样查找的，其中*.aspx和*.ascx以及*.vbhtml都是我们不需要的。

我们可以想象，这里不管采用什么办法，肯定至少4次访问文件系统并判断对应文件是否存在，才会找到我们的index.cshtml，这样的开销小型应用可以忽略，如果并发量千万级（总之很大，具体未测）肯定对性能有一定影响。

怎么避免，不要去查找*.aspx,*.ascx以及*.vbhtml?

经过几番折腾，我们成功找到了解决办法:

Mvc中有两个视图引擎,webformengine和razorengine,解决办法就是，确定不使用webform的情况下，移除webformengine,然后移除razorengine并添加改写了的razorengine。

 

移除的代码在global.ascx.cs的application_start方法中这样写：

ViewEngines.Engines.Clear();

重写razorengine的方法：

public class Engine : RazorViewEngine

{

public Engine( )

        {

            base.AreaViewLocationFormats = new string[]

            {

                "~/Areas/{2}/Views/{1}/{0}.cshtml",

                "~/Areas/{2}/Views/Shared/{0}.cshtml",

            };

            base.AreaMasterLocationFormats = new string[]

            {

                "~/Areas/{2}/Views/{1}/{0}.cshtml",

                "~/Areas/{2}/Views/Shared/{0}.cshtml",

                

            };

            base.AreaPartialViewLocationFormats = new string[]

            {

                "~/Areas/{2}/Views/{1}/{0}.cshtml",

                "~/Areas/{2}/Views/Shared/{0}.cshtml",

            };

            base.ViewLocationFormats = new string[]

            {

                "~/Views/{1}/{0}.cshtml",

                "~/Views/Shared/{0}.cshtml",

            };

            base.MasterLocationFormats = new string[]

            {

                "~/Views/{1}/{0}.cshtml",

                "~/Views/Shared/{0}.cshtml",

            };

            base.PartialViewLocationFormats = new string[]

            {

                "~/Views/{1}/{0}.cshtml",

                "~/Views/Shared/{0}.cshtml",

            };

            base.FileExtensions = new string[]

            {

                "cshtml",

            };

        }

}

然后添加改写的视图引擎：

ViewEngines.Engines.Add(new Engine());

版权归二师弟和博客园共同所有，欢迎转载和分享知识。转载请注明出处！

最终application_start方法如下：