如何将自定义DLL加载到PowerShell中

Question

我一直在尝试将自定义DLL加载到PowerShell中，但没有运气。

正在创建我的DLL based on this repository。我的最终目标是能够加载Monster.dll，但我认为我将从Dice.dll开始（因为它是一个几乎没有依赖项的静态类）。

我尝试过的事情

在PowerShell中：

cd C:\some\repo\dnd\dice\bin\Debug\netstandard2.1

$path = (pwd).Path

$path += "\Dice.dll"

[Reflection.Assembly]::LoadFile("$path")

GAC    Version        Location
---    -------        --------
False  v4.0.30319     C:\some\repo\dnd\dice\bin\Debug\netstandard2.1\Dice.dll

然后我尝试调用简单的Roll Dice函数（看起来像这样）

[Dice.Dice]::Roll(20, 1)

它返回此错误：

Unable to find type [Dice.Dice].
At line:1 char:1
+ [Dice.Dice]::Roll(20, 1)
+ ~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (Dice.Dice:TypeName) [], RuntimeException
    + FullyQualifiedErrorId : TypeNotFound

如果我尝试致电，也会发生同样的事情：

[Dice]::Roll(20, 1)

我在做什么错？

编辑

有人建议我尝试：

Add-Type -Path "$path"

它返回此错误：

Add-Type : Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
At line:1 char:1
+ Add-Type -Path "$path"
+ ~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Add-Type], ReflectionTypeLoadException
    + FullyQualifiedErrorId : System.Reflection.ReflectionTypeLoadException,Microsoft.PowerShell.Commands.AddTypeCommand

真正的“ LoadExeption”是

Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its
dependencies. The system cannot find the file specified.

评论中的另一个建议是运行：

[appdomain]::currentdomain.getassemblies()

我能够从该命令中找到此数据

@{CodeBase=file:///C:/some/Repo/DnD/dice/bin/Debug/netstandard2.1/Dice.dll; FullName=Dice,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=null; EntryPoint=; DefinedTypes=; Evidence=System.Security.Policy.Evidence;
PermissionSet=<PermissionSet class="System.Security.PermissionSet"
version="1"
Unrestricted="true"/>
; SecurityRuleSet=Level2; ManifestModule=Dice.dll; ReflectionOnly=False;
Location=C:\some\Repo\DnD\dice\bin\Debug\netstandard2.1\Dice.dll; ImageRuntimeVersion=v4.0.30319;
GlobalAssemblyCache=False; HostContext=0; IsDynamic=False;
EscapedCodeBase=file:///C:/some/Repo/DnD/dice/bin/Debug/netstandard2.1/Dice.dll; ExportedTypes=;
IsFullyTrusted=True; CustomAttributes=; Modules=System.Reflection.RuntimeModule[]}

我也运行了此命令：

try {
    ([appdomain]::currentdomain.GetAssemblies() | where Location -match 'dice').gettypes()
} catch {
    $_ | select *
}

PSMessageDetails      :
Exception             : System.Management.Automation.MethodInvocationException: Exception calling "GetTypes" with "0" argument(s):
                        "Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more
                        information." ---> System.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested
                        types. Retrieve the LoaderExceptions property for more information.
                           at System.Reflection.RuntimeModule.GetTypes(RuntimeModule module)
                           at System.Reflection.Assembly.GetTypes()
                           at CallSite.Target(Closure , CallSite , Object )
                           --- 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)
TargetObject          :
CategoryInfo          : NotSpecified: (:) [], MethodInvocationException

Answer 1

关键信息在“ LoadException”消息中：

Could not load file or assembly 'netstandard, Version=2.1.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its
dependencies. The system cannot find the file specified.

它说找不到程序集netstandard, Version=2.1.0.0。这将阻止PowerShell加载Dice，因为Dice是根据.NET Standard 2.1编译的。]

我不确定通过PowerShell支持.NET Standard 2.1的细微差别。您可能需要更新版本的PowerShell，或者可能只需要安装正确的.NET SDK /运行时组件。

如果您不依赖于.NET Standard 2.1，请尝试将C＃项目重新配置为以.NET Standard 2.0或.NET Framework 4.7（或更低版本）为目标。