Question

我有一个非常简单的类CompiledFunction（MarshalByRefObject） - 我尝试在新域中创建一个这样的实例，如此

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Console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关于为什么这不适用于Web应用程序的建议吗？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:

Answer 1

问题是Assembly.Code基础以file：/// {其余路径在这里}开始 - 当在这样的路径上使用Path.GetDirectoryName时，它用一个正斜杠替换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);
}

Answer 2

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ApplicationBase（更有可能）。

在计算ApplicationBase属性时，Path.GetDirectoryName调用是可疑的。

AppDomain.CreateInstanceAndUnwrap无法在网站中使用

2 个答案: