Asp.net MVC 自定义ViewEngine的简单实现

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace MvcSkinDemo.Code

{

    public class ThemeViewEngine : VirtualPathProviderViewEngine

    {

        private string _theme;

        /// <summary>

        /// 使用的主题名称

        /// </summary>

        public string Theme

        {

            get { return _theme; }

            set

            {

                _theme = string.IsNullOrEmpty(value) ? "Default" : value;

                SetLocationFormats(_theme);

            }

        }

        public ThemeViewEngine(string themeName)

        {

            Theme = themeName;

        }

        /// <summary>

        /// 设置视图的搜索路径集合

        /// </summary>

        /// <param name="themeName">主题名</param>

        private void SetLocationFormats(string themeName)

        {

            base.MasterLocationFormats = new[] {

                "~/Views/Themes/" + themeName + "/{1}/{0}.master",

                "~/Views/Themes/" + themeName + "/Shared/{0}.master",

                "~/Views/Themes/Shared/{0}.master"

            };

            base.ViewLocationFormats = new[] {

                "~/Views/Themes/" + themeName + "/{1}/{0}.aspx",

                "~/Views/Themes/" + themeName + "/{1}/{0}.ascx",

                "~/Views/Themes/" + themeName + "/Shared/{0}.aspx",

                "~/Views/Themes/" + themeName + "/Shared/{0}.ascx",

                "~/Views/Themes/Shared/{1}/{0}.aspx",

                "~/Views/Themes/Shared/{1}/{0}.ascx",

                "~/Views/Themes/Shared/{0}.aspx",

                "~/Views/Themes/Shared/{0}.ascx"

            };

            base.PartialViewLocationFormats = base.ViewLocationFormats;

        }

        protected override IView CreatePartialView(ControllerContext controllerContext, string partialPath)

        {

            return new WebFormView(partialPath);

        }

        protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)

        {

            return new WebFormView(viewPath, masterPath);

        }

    }

}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

protected void Application_Start()

     {

         AreaRegistration.RegisterAllAreas();

         ///初始化ViewEngine

         InitViewEngine();

         RegisterRoutes(RouteTable.Routes);

     }

     private void InitViewEngine()

     {

         ViewEngines.Engines.Clear();

         //在RC中目前还没找到好的在Controller中修改ViewEngine的办法

         //只好在这里将顺序换一下，对性能有一点影响

         //ViewEngines.Engines.Add(new ThemeViewEngine(theme));

         ViewEngines.Engines.Add(new ThemeViewEngine("default"));

     }

1

(ViewEngines.Engines[0] as ThemeViewEngine).Theme = "green";