调用实例方法时的Powershell MethodInvocationException

Question

场景和问题代码

在创建封装上述方法的公共类的新实例后，我将在自定义程序集库中调用一个公共方法。

$openApiDocumentGenerator = New-Object Microsoft.OpenApi.CSharpComment.Reader.OpenApiDocumentGenerator
$openApiDocumentGenerator.GenerateSerializedOpenApiDocuments( $VisualStudioXmlDocument, $AssemblyPaths, $OpenApiSpecVersion, $OpenApiFormat, $ConfigurationXmlDocument)

通过执行以下操作加载了我的自定义程序集和依赖项，

Add-Type -AssemblyName "System.Web"
Add-Type -AssemblyName "System.Xml.Linq"
Add-Type -Path $newtonsoftJsonAssemblyPath
Add-Type -Path $sharpYamlAssemblyPath
Add-Type -Path $microsoftOpenApiReadersAssemblyPath
Add-Type -Path $microsoftOpenApiAssemblyPath
Add-Type -Path $csharpCommentReaderAssemblyPath

调用GenerateSerializedOpenApiDocuments方法后出现的异常

System.Management.Automation.MethodInvocationException: Exception calling "GenerateSerializedOpenApiDocuments" with "5" argument(s): "Could not load file or assembly 'Microsoft.OpenApi.CSharpComment.Reader, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified." ---> System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.OpenApi.CSharpComment.Reader, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
   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 Microsoft.OpenApi.CSharpComment.Reader.AppDomainCreator`1..ctor()
   at Microsoft.OpenApi.CSharpComment.Reader.OpenApiDocumentGenerator.GenerateSerializedOpenApiDocuments(XDocument annotationXmlDocument, IList`1 contractAssemblyPaths, OpenApiSpecVersion openApiSpecVersion, OpenApiFormat openApiFormat, XDocument configurationXmlDocument)
   at CallSite.Target(Closure , CallSite , Object , XDocument , Object , Object , Object , XDocument )
   --- End of inner exception stack trace ---
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)

到目前为止我试过什么？

1. 确保CLRVersion of PowerShell与我的自定义程序集和依赖项相匹配，即.Net Framework4.6.2 PS D:> $psversiontable名称值- PSVersion 5.1.15063.786 PSEdition桌面PSCompatibleVersions {1.0，2.0，3.0，4.0.} BuildVersion 10.0.15063.786 CLRVersion 4.0.30319.42000 WSManStackVersion 3.0 PSRemotingProtocolVersion 2.3 SerializationVersion 1.1.0.1
2. 确保我的自定义程序集(下面由++表示)与它的所有依赖项一起加载(由-下面表示)。为了获得加载程序集的列表，我在生成上述异常的代码行之前利用了[System.AppDomain]::CurrentDomain.GetAssemblies()。 {FullName=mscorlib；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b77a5c561934e089} {FullName=Microsoft.PowerShell.ConsoleHost；Version= 3.0.0.0；Culture=中性；PublicKeyToken= 31bf3856ad364e35} -{FullName=System；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b77a5c561934e089} {FullName=System.Core；Version= 4.0.0.0；b77a5c561934e089} {#en0 20#；3.0.0.0；中性；31bf3856ad364e35} en24 1.0.0.0；中性；PublicKeyToken= 31bf3856ad364e35} {FullName=System.Management；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b03f5f7f11d50a3a} {FullName=System.DirectoryServices；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b03f5f7f11d50a3a} -{FullName=System.Xml；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b77a5c561934e089} {FullName=System.Numerics；PublicKeyToken= 4.0.0.0；FullName=System.Numerics中性；en29 20#}{en21#；4.0.0.0；中性；}{承载；0.0.0.0；中性；PublicKeyToken= null} {FullName=Microsoft.PowerShell.Security；Version= 3.0.0.0；Culture=中性；PublicKeyToken= 31bf3856ad364e35} {FullName=System.Transactions；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b77a5c561934e089} {FullName=System.Configuration；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b03f5f7f11d50a3a} {FullName=Microsoft.Powershell.PSReadline；FullName=Microsoft.Powershell.PSReadline 3.0.0.0；PublicKeyToken= 31bf3856ad364e35} {#en0 20#；4.0.0.0；中性；en24#}en25#3.0.0；{FullName=Microsoft.PowerShell.Commands.Utility；Culture=中性；PublicKeyToken= 31bf3856ad364e35} {FullName=System.Configuration.Install；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b03f5f7f11d50a3a} b03f5f7f11d50a3a Version= 3.0.0.0；Culture=中性；PublicKeyToken= 31bf3856ad364e35} -{FullName=Newtonsoft.Json；Version= 8.0.0.0；Culture=中性；PublicKeyToken= 30ad4Fe6b2a6a6aaeed}-{FullName=SharpYaml；Version= 1.6.1.0；PublicKeyToken=中性；1 Ced8108e942bc02}-{；#en23 20# 1.0.0.0；#en21中性；3f5743946376f042} -{#en23；++{FullName=Microsoft.OpenApi.CSharpComment.Reader；Version= 1.0.0.0；Culture=中性；PublicKeyToken= 3f5743946376f042} Version= 1.0.0.0；Culture=中性；PublicKeyToken= null} -{FullName=System.Xml.Linq；Version= 4.0.0.0；Culture=中性；PublicKeyToken= }-{FullName=System.Web；Version= 4.0.0.0；Culture=中性；PublicKeyToken= b03f5f7f11d50a3a} -

问题是什么呢？我调用方法不正确吗？

Answer 1

结果，我调用的库创建了一个新的应用程序域，然后尝试加载我传递的程序集。但是，新的应用程序域基路径被设置为机器上PowerShell.exe的位置，因此路径不能正确解析，因为路径相对于脚本的应用域基础路径。

在我的例子中，解决方案是在调用库之前设置基本路径，然后在库将控制权返回给我的脚本后恢复原来的基本路径。