问题描述
正如我的问题 使用 PowerShell 创建 ISO 映像:如何将 IStream 保存到文件? 中所述,我在 PowerShell 中创建了一个 IStream
对象如下:
As described in my question Create ISO image using PowerShell: how to save IStream to file?, in PowerShell I create an IStream
object as follows:
$is = (New-Object -ComObject IMAPI2FS.MsftFileSystemImage).CreateResultImage().ImageStream
此对象属于 (PowerShell) 类型 System.__ComObject
.不知何故,PowerShell 知道它是一个 IStream
:
This object is of (PowerShell) type System.__ComObject
. And somehow PowerShell knows that it is an IStream
:
PS C:> $is -is [System.Runtime.InteropServices.ComTypes.IConnectionPoint]
False
PS C:> $is -is [System.Runtime.InteropServices.ComTypes.IStream]
True
但是,转换为这种类型失败:
However, a cast to this type fails:
PS C:> [System.Runtime.InteropServices.ComTypes.IStream] $is
Cannot convert the "System.__ComObject" value of type "System.__ComObject" to type "System.Runtime.InteropServices.ComT
ypes.IStream".
At line:1 char:54
+ [System.Runtime.InteropServices.ComTypes.IStream] $is <<<<
+ CategoryInfo : NotSpecified: (:) [], RuntimeException
+ FullyQualifiedErrorId : RuntimeException
如何在不使用 C# 代码的情况下进行这种转换?
How do I make this conversion work, without using C# code?
更新:显然,正如 x0n 的回答所说,这种转换无法正常工作.
Update: Apparently this conversion cannot be made to work, as x0n's answer says.
现在,我的目标是将这个 IStream
COM 对象传递给一些 C# 代码(使用 Add-Type
的同一 PowerShell 脚本的一部分),在那里它将变成System.Runtime.InteropServices.ComTypes.IStream
类型的 .NET 对象.那可能吗?如果没有,我有什么选择?
Now, my goal is to pass this IStream
COM object to some C# code (part of the same PowerShell script using Add-Type
), where it would become a .NET object of type System.Runtime.InteropServices.ComTypes.IStream
. Is that possible? If not, what alternatives do I have?
推荐答案
你可以尝试在一个(不安全的)c#方法中传递$is
,比如一个object
类型和尝试使用声明为 System.Runtime.InteropServices.ComTypes.IStream
You can try to pass $is
in a (unsafe) c# method like an object
type and try to handle it with a VAR
declared as System.Runtime.InteropServices.ComTypes.IStream
public unsafe static class MyClass
{
public static void MyMethod(object Stream)
{
var i = Stream as System.Runtime.InteropServices.ComTypes.IStream;
//do something with i like i.read(...) and i.write(...)
}
}
在powershell中添加类型后:
In powershell after the add-type:
[MyClass]::MyMethod($is)
这篇关于PowerShell:如何将 COM 对象转换为 .NET 互操作类型?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!