.Net平台下实例类型无法转换成接口类型?
时间:2014-05-04 20:24:23
收藏:0
阅读:433
首先这种情况出现在应用程序启动前的方法里面。
本想通过发射来实现一些功能。谁知道被这个坑了。
碰到这种问题。已经相当无语了。同时也不知道该如何解决。望有能之士帮忙解答
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 |
using
System; using
System.IO; using
System.Linq; using
System.Reflection; using
System.Web; using
System.Web.Compilation; using
System.Web.Hosting; using
Infrastructure; [assembly: PreApplicationStartMethod( typeof (PreApplicationInit), "InitializePlugins" )] namespace
Infrastructure { public
class PreApplicationInit { static
PreApplicationInit() { var
pluginsPath = HostingEnvironment.MapPath( "~/plugins" ); var
pluginsTempPath = HostingEnvironment.MapPath( "~/plugins/temp" ); if
(pluginsPath == null
|| pluginsTempPath == null ) throw
new DirectoryNotFoundException( "plugins" ); PluginFolder = new
DirectoryInfo(pluginsPath); TempPluginFolder = new
DirectoryInfo(pluginsTempPath); } /// <summary> /// The source plugin folder from which to copy from /// </summary> /// <remarks> /// This folder can contain sub folders to organize plugin types /// </remarks> private
static readonly DirectoryInfo PluginFolder; /// <summary> /// The folder to copy the plugin DLLs to use for running the app /// </summary> private
static readonly DirectoryInfo TempPluginFolder; /// <summary> /// Initialize method that registers all plugins /// </summary> public
static void InitializePlugins() { var
assemblies = PluginFolder.GetFiles( "*.dll" , SearchOption.AllDirectories) .Select(x => Assembly.LoadFrom(x.FullName)); foreach
( var
assembly in
assemblies) { var
type = assembly.GetTypes().FirstOrDefault(t => t.GetInterface( typeof (IModule).Name) != null ); if
(type == null ) continue ; //Add the plugin as a reference to the application if
(AppDomain.CurrentDomain.GetAssemblies().All(a => a.FullName != assembly.FullName)) { BuildManager.AddReferencedAssembly(assembly); } //Add the modules to the PluginManager to manage them later var
module = (IModule)Activator.CreateInstance(type); PluginManager.Current.Modules.Add(module, assembly); } } } } |
上面是代码。
如果通过Type.IsAssignableFrom方法来查找接口的实现,根本查不到。
这是目录结构
这是Module的实现
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 |
using
System; using
Infrastructure; namespace
NewsPlugin { public
class Module:IModule { public
string Name { get { return
"NewsPlugin" ; } set { if
(value == null ) throw
new ArgumentNullException( "value" ); this .Name = value; } } } } |
评论(0)