如何通过/传递参数作为反射? -Visual Studio可扩展性C# [英] how to pass/transfer out parameter as reflection? - visual studio extensibility c#

问题描述

我有一个out参数. 是否可以将其作为反射传递? 你能给我一些例子怎么做吗?

I have an out parameter. Is it possible to transfer it as reflection? Can you give me some examples how to do that?

推荐答案

我不确定这与VS可扩展性有什么关系，但是肯定可以通过反射调用带有out参数的方法并找出答案之后out参数的值:

I'm not sure what this has to do with VS extensibility, but it's certainly possible to invoke a method with an out parameter by reflection and find out the out parameter's value afterwards:

using System;
using System.Reflection;

class Test
{
    static void Main()
    {
        MethodInfo method = typeof(int).GetMethod
            ("TryParse", new Type[] { typeof(string),
                                      typeof(int).MakeByRefType() });

        // Second value here will be ignored, but make sure it's the right type
        object[] args = new object[] { "10", 0 };

        object result = method.Invoke(null, args);
        Console.WriteLine("Result: {0}", result);
        Console.WriteLine("args[1]: {0}", args[1]);
    }
}

请注意您需要如何保留对用于将参数传递给方法的数组的引用-这就是随后获取out参数值的方式.对于ref也是一样.

Note how you need to keep a reference to the array used to pass arguments to the method - that's how you get the out parameter value afterwards. The same is true for ref.

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