asp.net mvc中换肤机制类库 ThemedViewEngines

  1 using System;
  2 using System.Web.Mvc;
  3 
  4 namespace ThemedViewEngines
  5 {
  6     public class ThemedRazorViewEngine : RazorViewEngine
  7     {
  8         private readonly IThemeSelectorService _themeSelectorService;
  9         public string DefaultMasterName { get; set; }
 10         public ThemedRazorViewEngine(IThemeSelectorService themeSelectorService)
 11             : base()
 12         {
 13             DefaultMasterName = "_Layout";
 14             this._themeSelectorService = themeSelectorService;
 15 
 16             AreaViewLocationFormats = new[]
 17             {
 18                 "~/#@/Areas/{2}/Views/{1}/{0}.cshtml",
 19                 "~/#@/Areas/{2}/Views/{1}/{0}.vbhtml",
 20                 "~/#@/Areas/{2}/Views/Shared/{0}.cshtml",
 21                 "~/#@/Areas/{2}/Views/Shared/{0}.vbhtml",
 22 
 23                 "~/Areas/{2}/Views/{1}/{0}.cshtml",
 24                 "~/Areas/{2}/Views/{1}/{0}.vbhtml",
 25                 "~/Areas/{2}/Views/Shared/{0}.cshtml",
 26                 "~/Areas/{2}/Views/Shared/{0}.vbhtml"
 27             };
 28             AreaMasterLocationFormats = new[]
 29             {
 30                 "~/#@/Areas/{2}/Views/{1}/{0}.cshtml",
 31                 "~/#@/Areas/{2}/Views/{1}/{0}.vbhtml",
 32                 "~/#@/Areas/{2}/Views/Shared/{0}.cshtml",
 33                 "~/#@/Areas/{2}/Views/Shared/{0}.vbhtml",
 34 
 35                 "~/Areas/{2}/Views/{1}/{0}.cshtml",
 36                 "~/Areas/{2}/Views/{1}/{0}.vbhtml",
 37                 "~/Areas/{2}/Views/Shared/{0}.cshtml",
 38                 "~/Areas/{2}/Views/Shared/{0}.vbhtml"
 39             };
 40             AreaPartialViewLocationFormats = new[]
 41             {
 42                 "~/#@/Areas/{2}/Views/{1}/{0}.cshtml",
 43                 "~/#@/Areas/{2}/Views/{1}/{0}.vbhtml",
 44                 "~/#@/Areas/{2}/Views/Shared/{0}.cshtml",
 45                 "~/#@/Areas/{2}/Views/Shared/{0}.vbhtml",
 46 
 47                 "~/Areas/{2}/Views/{1}/{0}.cshtml",
 48                 "~/Areas/{2}/Views/{1}/{0}.vbhtml",
 49                 "~/Areas/{2}/Views/Shared/{0}.cshtml",
 50                 "~/Areas/{2}/Views/Shared/{0}.vbhtml"
 51             };
 52 
 53             ViewLocationFormats = new[]
 54             {
 55                 "~/#@/Views/{1}/{0}.cshtml",
 56                 "~/#@/Views/{1}/{0}.vbhtml",
 57                 "~/#@/Views/Shared/{0}.cshtml",
 58                 "~/#@/Views/Shared/{0}.vbhtml",
 59 
 60                 "~/Views/{1}/{0}.cshtml",
 61                 "~/Views/{1}/{0}.vbhtml",
 62                 "~/Views/Shared/{0}.cshtml",
 63                 "~/Views/Shared/{0}.vbhtml"
 64             };
 65             MasterLocationFormats = new[]
 66             {
 67                 "~/#@/Views/{1}/{0}.cshtml",
 68                 "~/#@/Views/{1}/{0}.vbhtml",
 69                 "~/#@/Views/Shared/{0}.cshtml",
 70                 "~/#@/Views/Shared/{0}.vbhtml",
 71 
 72                 "~/Views/{1}/{0}.cshtml",
 73                 "~/Views/{1}/{0}.vbhtml",
 74                 "~/Views/Shared/{0}.cshtml",
 75                 "~/Views/Shared/{0}.vbhtml"
 76             };
 77             PartialViewLocationFormats = new[]
 78             {
 79                 "~/#@/Views/{1}/{0}.cshtml",
 80                 "~/#@/Views/{1}/{0}.vbhtml",
 81                 "~/#@/Views/Shared/{0}.cshtml",
 82                 "~/#@/Views/Shared/{0}.vbhtml",
 83 
 84                 "~/Views/{1}/{0}.cshtml",
 85                 "~/Views/{1}/{0}.vbhtml",
 86                 "~/Views/Shared/{0}.cshtml",
 87                 "~/Views/Shared/{0}.vbhtml"
 88             };
 89             FileExtensions = new[]
 90             {
 91                 "cshtml",
 92                 "vbhtml",
 93             };
 94         }
 95         protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)
 96         {
 97             string replacedPartialPath = GetThemedPath(partialPath);
 98             return base.CreatePartialView(controllerContext, replacedPartialPath);
 99         }
100         protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
101         {
102             string replacedViewPath = GetThemedPath(viewPath);
103             string replacedMasterPath = GetThemedPath(masterPath);
104             return base.CreateView(controllerContext, replacedViewPath, replacedMasterPath);
105         }
106         protected override bool FileExists(ControllerContext controllerContext, string virtualPath)
107         {
108             string replacedVirtualPath = GetThemedPath(virtualPath);
109             return base.FileExists(controllerContext, replacedVirtualPath);
110         }
111         public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
112         {
113             var themeName = this._themeSelectorService.GetThemeName();
114             if (!string.IsNullOrEmpty(themeName) && string.IsNullOrEmpty(masterName))
115             {
116                 //In case if we have a theme, and the request view is not found in the theme folder (i.e. we will use the default view), 
117                 // we will not be able to locate the theme‘s master page via _ViewStart (as the view is now in the default "theme" tree )
118                 //Therefore we have to manually locate the Master page name here
119                 masterName = DefaultMasterName;
120             }
121             return base.FindView(controllerContext, viewName, masterName, false);
122         }
123         private string GetThemedPath(string originalPath)
124         {
125             var replacedPath = originalPath;
126             var themeName = this._themeSelectorService.GetThemeName();
127             if (!string.IsNullOrEmpty(themeName))
128             {
129                 string replaceText = string.Format("Themes/{0}", themeName);
130                 replacedPath = originalPath.Replace("#@", replaceText);
131             }
132             return replacedPath;
133         }
134     }
135 }

 1 namespace ThemedViewEngines
 2 {
 3     public class ConfigThemeService : IThemeSelectorService
 4     {
 5         public string GetThemeName()
 6         {
 7             return ConfigurationManager.AppSettings["ThemeName"] ?? string.Empty;
 8         }
 9         public void SetThemeName(string themeName)
10         {
11             throw new NotSupportedException();
12         }
13 
14     }
15 }

 1 namespace ThemedViewEngines
 2 {
 3     public interface IThemeSelectorService
 4     {
 5         /// <summary>
 6         /// 获取Theme名称
 7         /// </summary>
 8         /// <returns></returns>
 9         string GetThemeName();
10         /// <summary>
11         /// 设置主题名称
12         /// </summary>
13         /// <param name="themeName"></param>
14         void SetThemeName(string themeName);
15     }
16 }

 1 using System;
 2 using System.Web;
 3 
 4 namespace ThemedViewEngines
 5 {
 6     public class CookieThemeService : IThemeSelectorService
 7     {
 8         public string GetThemeName()
 9         {
10             var cookie = HttpContext.Current.Request.Cookies["ThemeName"];
11             if (cookie != null)
12                 return cookie.Value;
13             return string.Empty;
14         }
15 
16         public void SetThemeName(string themeName)
17         {
18             throw new System.NotImplementedException();
19         }
20     }
21 }

1 ViewEngines.Engines.Clear();
2 //用 Web.config 配置 theme 的写法
3 ViewEngines.Engines.Add(new ThemedRazorViewEngine(new ConfigThemeService()));
4 //用cookie配置theme的写法
5 //ViewEngines.Engines.Add(new ThemedRazorViewEngine(new CookieThemeService()));

    <!--Theme配置-->
    <add key="ThemeName" value="blue" />
    <!--Theme配置 end-->