获得通用的呼叫类型来动态对象的方法

问题描述：

我开始在.NET中使用动态对象的工作，我无法弄清楚如何做一些事情。

I'm starting to work with dynamic objects in .Net and I can't figure out how to do something.

我有一个从DynamicObject继承的类，我重写TryInvokeMember方法。

I have a class that inherits from DynamicObject, and I override the TryInvokeMember method.

例如

class MyCustomDynamicClass : DynamicObject
{
    public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
    {
        // I want to know here the type of the generic argument
    }
}

和那个方法里面我想知道的类型（如果有的话）的调用通用的参数。

And inside that method I want to know the type (if any) of the generic arguments in the invocation.

如
。如果我调用下面的代码，我要得到我的动态对象。

e.g. If I invoke the following code, I want to get the value of System.Boolean and System.Int32 inside the overrided method of my dynamic object

dynamic myObject = new MyCustomDynamicClass();
myObject.SomeMethod<bool>("arg");
myObject.SomeOtherMethod<int>("arg");

目前，如果我把overrided方法中的断点，我可以得到的被调用的方法的名称（的someMethod和SomeOtherMethod，也的参数值，但不是泛型类型）。

Currently if I place a breakpoint inside the overrided method I can get the name of the method being invoked ("SomeMethod" and "SomeOtherMethod", and also the values of the arguments, but not the generic types).

我怎样才能获得这些价值？

How can I get these values?

谢谢！

答

其实我通过粘结剂的层次看，发现一个属性用在物体的内部字段所需的值。

Actually I looked through the hierarchy of the binder and found a property with the needed values in the internal fields of the object.

的问题是，该属性不被暴露，因为它使用C＃的特异性代码/类，因此，性能。必须使用反射来访问

The problem is that the property isn't exposed because it uses C#-specific code/classes, therefore the properties must be accessed using Reflection.

我发现这个博客的日本代码： HTTP： //neue.cc/category/programming （我不读任何日本人，所以我不知道如果作者确实描述了同样的问题。

I found the code in this japanese blog: http://neue.cc/category/programming (I don't read any japanese, therefore I'm not sure if the author actually describes this same issue

这里的片断：

var csharpBinder = binder.GetType().GetInterface("Microsoft.CSharp.RuntimeBinder.ICSharpInvokeOrInvokeMemberBinder");
var typeArgs = (csharpBinder.GetProperty("TypeArguments").GetValue(binder, null) as IList<Type>);

typeArgs是包含类型的调用方法时所使用的通用的参数列表。

typeArgs is a list containing the types of the generic arguments used when invoking the method.

希望这可以帮助别人。

获得通用的呼叫类型来动态对象的方法

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