AppDomain.CreateInstanceAndUnwrap 在网站中不起作用

本文关键字：不起作用 网站 CreateInstanceAndUnwrap AppDomain | 更新日期: 2023-09-27 18:32:33

我有一个非常简单的类 CompiledFunction (MarshalByRefObject( - 我尝试在新域中创建它的实例，如下所示

var appDomainSetup = new AppDomainSetup();
appDomainSetup.ApplicationBase = Path.GetDirectoryName(typeof(CompilerService).Assembly.CodeBase);
var evidence = AppDomain.CurrentDomain.Evidence;
SandboxDomain = AppDomain.CreateDomain("Sandbox", evidence, appDomainSetup);
CompiledFunction<T> result = (CompiledFunction<T>)SandboxDomain.CreateInstanceAndUnwrap(
    assemblyName: typeof(CompiledFunction<T>).Assembly.GetName().Name,
    typeName: typeof(CompiledFunction<T>).FullName);

这在控制台应用程序中工作正常，但在 ASP .NET MVC 应用程序中，我得到以下异常 - 任何人都可以提供任何建议，说明为什么这在 Web 应用程序中不起作用？ 我传递的 T 参数是 System.Decimal

System.IO.FileLoadException was caught
  Message=The given assembly name or codebase, 'Ems.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null', was invalid.
  Source=mscorlib
  FileName=Ems.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
  FusionLog==== Pre-bind state information ===
LOG: User = EMSLaptop'PeterMorris
LOG: DisplayName = Ems.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
 (Fully-specified)
LOG: Appbase = /C:/Users/PeterMorris/Documents/Visual Studio 2010/Projects/MvcApplication26/MvcApplication26/bin
LOG: Initial PrivatePath = NULL
Calling assembly : (Unknown).
===
LOG: This bind starts in default load context.
LOG: Found application configuration file (C:'Program Files'Common Files'Microsoft Shared'DevServer'10.0'WebDev.WebServer40.exe.Config).
LOG: Using application configuration file: C:'Program Files'Common Files'Microsoft Shared'DevServer'10.0'WebDev.WebServer40.exe.Config
LOG: Using host configuration file: 
LOG: Using machine configuration file from C:'Windows'Microsoft.NET'Framework'v4.0.30319'config'machine.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 /C:/Users/PeterMorris/Documents/Visual Studio 2010/Projects/MvcApplication26/MvcApplication26/bin/Ems.Scripting.DLL.
  StackTrace:
       at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks)
       at System.Reflection.RuntimeAssembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
       at System.Activator.CreateInstance(String assemblyName, 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 Ems.Scripting.CompilerService.Compile[T](String[] scripts, Dictionary`2 variableDefinitions, IEnumerable`1 referencedAssemblies, ICompiledFunction`1& function, IEnumerable`1& compilerErrors) in C:'Data'EMS'Lib'Ems.Scripting'CompilerService.cs:line 43
  InnerException:

AppDomain.CreateInstanceAndUnwrap 在网站中不起作用

问题是Assembly.Code库以 file:///{此处路径的其余部分}开头 - 当在这样的路径上使用Path.GetDirectoryName时，它会用单个正斜杠替换 file:///;所以你最终得到"/c：''myfolder''myfile.dll">

让 Uri 告诉我本地路径是解决方案

if (SandboxDomain == null)
{
    var appDomainSetup = new AppDomainSetup();
    string appBase = typeof(CompilerService).Assembly.CodeBase;
    //Added the following line
    appBase = new Uri(appBase).LocalPath;
    appDomainSetup.ApplicationBase = Path.GetDirectoryName(appBase);
    var evidence = AppDomain.CurrentDomain.Evidence;
    SandboxDomain = AppDomain.CreateDomain("Sandbox", evidence, appDomainSetup);
}

看起来您没有正确复制 Web 项目的 Ems.Scripting 程序集或为您的新域设置错误的应用程序库(更有可能(。

Path.GetDirectoryName 调用在计算 ApplicationBase 属性时可疑。

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