[英]Get System.Type instance from within script (ClearScript)
I'm getting an exception when trying to call Enum.Parse from within a script hosted via ClearScript尝试从通过 ClearScript 托管的脚本中调用 Enum.Parse 时出现异常
Error: The non-generic method 'System.Enum.Parse(System.Type, string)' cannot be used with type arguments
--- Script error details follow ---
Error: The non-generic method 'System.Enum.Parse(System.Type, string)' cannot be used with type arguments
at translateParameterValue (Script [temp]:11:27) -> return clr.System.Enum.Parse(app.MyLibrary.MyEnum, value);
return clr.System.Enum.Parse(app.MyLibrary.MyEnum, value);
I'm pretty sure I registered the clr
object correctly (this contains mscorlib
, System
and System.Core
)我很确定我正确注册了clr
object (这包含mscorlib
, System
和System.Core
)
It seems ClearScript is trying to invoke and is getting confused whether to make the first parameter app.MyLibrary.MyEnum
a generic parameter or pass it as a System.Type
parameter.似乎 ClearScript 正在尝试调用,并且对是否将第一个参数app.MyLibrary.MyEnum
通用参数或将其作为System.Type
参数传递感到困惑。
What can I do to correctly invoke System.Enum.Parse
function given this scenario?在这种情况下,我该怎么做才能正确调用System.Enum.Parse
function?
The answer was simpler than I thought.答案比我想象的要简单。 Since ClearScript was treating the first argument like a generic parameter, you just need a function that returns a System.Type
instance from the type parameter which can be as simple as:由于 ClearScript 将第一个参数视为通用参数,因此您只需要一个 function 从类型参数返回一个System.Type
实例,它可以很简单:
class Utility
{
public Type GetType<T>() {
return typeof(T);
}
}
Then register it to your ScriptEngine
:然后将其注册到您的ScriptEngine
:
_engine.AddHostObject("Utility", new Utility());
Then use it in your script as:然后在你的脚本中使用它:
return clr.System.Enum.Parse(Utility.GetType(nepes.DecaTech.CoreData.ProcessStates), value);
ClearScript also ships with a utility class ExtendedHostFunctions
which provides several useful utility functions, including one similar to the above typeOf(T)
. ClearScript 还附带了一个实用程序 class ExtendedHostFunctions
,它提供了几个有用的实用程序函数,包括一个类似于上述typeOf(T)
的函数。
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