[英]How can I do this interface type of cast from C# in PowerShell?
I'm using the wuapi
to write a script that scans, downloads, and installs updates for a machine that is not connected to the Internet.我正在使用
wuapi
编写一个脚本,该脚本为未连接到 Internet 的机器扫描、下载和安装更新。 I have most of this script completed, but I need to be able to do a cast (I believe) to a different object.我已经完成了这个脚本的大部分内容,但是我需要能够对不同的对象进行强制转换(我相信)。
I found code here that does exactly what I need, but in C#:我在这里找到了完全符合我需要的代码,但在 C# 中:
WUApiLib IUpdateInstaller2 yields Error; WUApiLib IUpdateInstaller2 产生错误; Some OS updates install others throw HResult -2145124318
一些操作系统更新安装其他人会抛出 HResult -2145124318
And here is what the code looks like:这是代码的样子:
var collection = new UpdateCollection();
IList<string> updateFiles = Directory.GetFiles(updateFolder);
var fileCollection = new StringCollection();
foreach (var file in updateFiles)
fileCollection.Add(file);
//Error happens here on certain updates. Not all.
/** THIS LINE BELOW IS THE ONE I NEED **/
((IUpdate2)update.BundledUpdates[0]).CopyToCache(fileCollection);
collection.Add(update);
return collection;
The line ((IUpdate2)update.BundledUpdates[0]).CopyToCache(fileCollection);
行
((IUpdate2)update.BundledUpdates[0]).CopyToCache(fileCollection);
returns an IUpdate
object, but in order to use the CopyToCache
function, it needs to be an IUpdate2
object.返回一个
IUpdate
对象,但为了使用CopyToCache
函数,它需要是一个IUpdate2
对象。 I just can't seem to figure out how to get this part working as powershell gives me a "load library" type of error.我似乎无法弄清楚如何让这部分工作,因为 powershell 给了我一个“加载库”类型的错误。
Does anyone know how I can do this in PowerShell?有谁知道我如何在 PowerShell 中做到这一点?
If the problem is that the method CopyToCache
is implemented as an explicit interface implementation, maybe try如果问题是方法
CopyToCache
是作为显式接口实现来实现的,不妨试试
[IUpdate2].GetMethod("CopyToCache").Invoke($update.BundledUpdates[0], @($fileCollection))
or similar.或类似。
See How can I call explicitly implemented interface method from PowerShell?请参阅如何从 PowerShell 调用显式实现的接口方法?
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