简介
我正在尝试加载一些程序集并从中获取类型。。。组件的路径为
bin/Plugin1
我还试图为他们创建一个应用程序域，并在那里加载他们。基本步骤是：
1.创建域：
domain = AppDomain.CreateDomain( "Plugins" )
2.创建一个工人
worker = (Scan)domain.CreateInstanceAndUnwrap(
Assembly.GetExecutingAssembly().FullName, typeof(Scan ).FullName );
3.加载组件
worker.Scan( [PATH_TO_DLL] )
4.负载类型
Assembly.LoadFrom( [PATH_TO_DLL] ).GetExportedTypes()
我尝试了我能想到的任何方法，但我总是在第2步或第4步的某个地方得到FileNotFoundException。
我尝试了什么
1.ApplicationBase路径：
AppDomain.CurrentDomain.SetData( "APPBASE", "C:\...\Project\bin\Plugin1" );
AppDomain.CreateDomain("Plugins").CreateInstanceAndUnwrap(Assembly.GetExecutingAssembly().FullName, ... );
抛出FileNotFoundException
2.使用AppDomainSetup的新域
AppDomain.CurrentDomain.SetData( "APPBASE", "C:\...\Project\bin\Plugin1" );
AppDomain.CreateDomain( "Plugins", null, AppDomain.CurrentDomain.SetupInformation).CreateInstanceAndUnwrap(Assembly.GetExecutingAssembly().FullName, ... );
抛出FileNotFoundException
3.使用CreateInstanceFromAndUnwrap
var assembly = Path.Combine( AppDomain.CurrentDomain.BaseDirectory, "Plugin1", Path.GetFileName( Assembly.GetExecutingAssembly().Location ) );
AppDomain....CreateInstanceFromAndUnwrap(assembly, ... );
工作过，但
4.使用过的程序集。LoadFrom
var asm = Assembly.LoadFrom( [PATH_TO_ASSEMBLY] );//works
var types = asm.GetExportedTypes();
抛出FileNotFoundException
5.Web.Config探测
<probing privatePath="bin;bin/Plugin1;" />
没有任何帮助
这让我相信，强迫从路径加载程序集而不解决实际问题(程序集似乎加载到iis路径(并不能解决任何问题，我没有走上解决问题的正确道路。。。
我得到的例外
1.CreateInstance异常
System.IO.FileNotFoundException was unhandled by user code
HResult=-2147024894
Message=Could not load file or assembly 'Plugin.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
Source=mscorlib
FileName=Plugin.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
FusionLog== == Pre-bind state information == =
LOG: DisplayName = Plugin.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
(Fully-specified)
LOG: Appbase = file:///C:/.../Web/PluginWeb.heTest/PluginWeb.heTest/PluginWeb.heTest/bin/Plugin/
LOG: Initial PrivatePath = C:...WebPluginWeb.heTestPluginWeb.heTestPluginWeb.heTestbin
Calling assembly : (Unknown).
== =
LOG: This bind starts in default load context.
LOG: Configuration file C:...WebPluginWeb.heTestPluginWeb.heTestPluginWeb.heTestbinPluginweb.config does not exist.
LOG: No application configuration file found.
LOG: Using host configuration file: C:WindowsMicrosoft.NETFramework64v4.0.30319aspnet.config
LOG: Using machine configuration file from C:WindowsMicrosoft.NETFramework64v4.0.30319configmachine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/993f86a2/2dca2916/Plugin.Libs.Base.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/993f86a2/2dca2916/Plugin.Libs.Base/Plugin.Libs.Base.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/993f86a2/2dca2916/Plugin.Libs.Base.EXE.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework64/v4.0.30319/Temporary ASP.NET Files/root/993f86a2/2dca2916/Plugin.Libs.Base/Plugin.Libs.Base.EXE.
StackTrace:
at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
at System.Activator.CreateInstance(String assemblyString, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName)
at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName)
at Plugin.Libs.Base.Schema.mySchemaManager.<>c__DisplayClass6.<Scan>b__3() in c:...Plugin.Libs.BasePlugin.Libs.BaseSchemaManager.cs:line 202
at Plugin.Libs.Base.mySys.WriteLog(poSysLogScale scale, Action method, String message, Object[] args) in c:...Plugin.Libs.BasePlugin.Libs.BaseSys.cs:line 514
at Plugin.Libs.Base.Schema.mySchemaManager.Scan(Action'1 processView) in c:...Plugin.Libs.BasePlugin.Libs.BaseSchemaManager.cs:line 184
at Plugin.Libs.Base.Schema.mySchemaManager.<>c__DisplayClass1.<Load>b__0() in c:...Plugin.Libs.BasePlugin.Libs.BaseSchemaManager.cs:line 176
at Plugin.Libs.Base.mySys.WriteLog(poSysLogScale scale, Action method, String message, Object[] args) in c:...Plugin.Libs.BasePlugin.Libs.BaseSys.cs:line 514
at Plugin.Libs.Base.Schema.mySchemaManager.Load(Action'1 processView) in c:...Plugin.Libs.BasePlugin.Libs.BaseSchemaManager.cs:line 175
at Plugin.Libs.Base.myApplication.Load(Action'1 processView) in c:...Plugin.Libs.BasePlugin.Libs.BaseApplication.cs:line 141
at Plugin.Web.Forms.Fakes.FakeAppContext.Get(String aliasFileName, String userName, String password) in c:...PluginWeb.heTestPluginWeb.heTestPlugin.Web.FormsFakesAppContext.cs:line 25
at Plugin.Web.Forms.Controllers.BaseController..ctor() in c:...PluginWeb.heTestPluginWeb.heTestPlugin.Web.FormsControllersBaseController.cs:line 30
at PluginWeb.heTest.Classes.BaseController..ctor()
at PluginWeb.heTest.Controllers.HomeController..ctor()
InnerException:
2.GetExportedTypes((异常
System.IO.FileNotFoundException was caught
HResult=-2147024894
Message=Could not load file or assembly 'PluginChild.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
Source=mscorlib
FileName=PluginChild.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
FusionLog== == Pre-bind state information == =
LOG: DisplayName = PluginChild.Libs.Base, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
(Fully-specified)
LOG: Appbase = file:///c:/windows/system32/inetsrv/
LOG: Initial PrivatePath = NULL
Calling assembly : PluginChild.Obj.MGM.DataObjects, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null.
== =
LOG: This bind starts in LoadFrom load context.
WRN: Native image will not be probed in LoadFrom context. Native image will only be probed in default load context, like with Assembly.Load().
LOG: No application configuration file found.
LOG: Using host configuration file: C:WindowsMicrosoft.NETFramework64v4.0.30319aspnet.config
LOG: Using machine configuration file from C:WindowsMicrosoft.NETFramework64v4.0.30319configmachine.config.
LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
LOG: Attempting download of new URL file:///c:/windows/system32/inetsrv/PluginChild.Libs.Base.DLL.
LOG: Attempting download of new URL file:///c:/windows/system32/inetsrv/PluginChild.Libs.Base/PluginChild.Libs.Base.DLL.
LOG: Attempting download of new URL file:///c:/windows/system32/inetsrv/PluginChild.Libs.Base.EXE.
LOG: Attempting download of new URL file:///c:/windows/system32/inetsrv/PluginChild.Libs.Base/PluginChild.Libs.Base.EXE.
LOG: Attempting download of new URL file:///C:/.../PluginWeb.heTest/PluginWeb.heTest/bin/Apps/Obj/PluginChild.Libs.Base.DLL.
LOG: Attempting download of new URL file:///C:/.../PluginWeb.heTest/PluginWeb.heTest/bin/Apps/Obj/PluginChild.Libs.Base/PluginChild.Libs.Base.DLL.
LOG: Attempting download of new URL file:///C:/.../PluginWeb.heTest/PluginWeb.heTest/bin/Apps/Obj/PluginChild.Libs.Base.EXE.
LOG: Attempting download of new URL file:///C:/.../PluginWeb.heTest/PluginWeb.heTest/bin/Apps/Obj/PluginChild.Libs.Base/PluginChild.Libs.Base.EXE.
StackTrace:
at System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly assembly, ObjectHandleOnStack retTypes)
at System.Reflection.RuntimeAssembly.GetExportedTypes()
at Plugin.Libs.Base.Schema.SchemaManager.MarsalScan.ScanAssembly(ScanResult res, String item) in c:...Plugin.Libs.BasePlugin.Libs.BaseSchemaManager.cs:line 81
InnerException:
任何帮助都将不胜感激！
您的问题帮助我找到了解决类似情况的方法。我想这可能会帮助其他人。我在asp.net上写了一个网站。
我在步骤2中成功地使用了CreateInstanceFromAndUnwrap。与CreateInstanceFromAndUnwrap一样，您可以指定所需程序集的位置。
worker = (Scan)domain.CreateInstanceFromAndUnwrap(Assembly.GetExecutingAssembly().Location, typeof(Scan ).FullName);