反思：如何获得一个通用的方法是什么？

问题描述

Hi there

Let's say I have two following two methods in a class:

public void MyMethod(object val) {}
public void MyMethod<T>(T val) {}

With reflection, I could get the first Method like this:

Type[] typeArray = new Type[1];
typeArray.SetValue(typeof(object), 1);
var myMethod = myInstance.GetType().GetMethod("MyMethod", typeArray);

But how can I get the second, generic method?

解决方案

var myMethod = myInstance.GetType()
                         .GetMethods()
                         .Where(m => m.Name == "MyMethod")
                         .Select(m => new {
                                              Method = m,
                                              Params = m.GetParameters(),
                                              Args = m.GetGenericArguments()
                                          })
                         .Where(x => x.Params.Length == 1
                                     && x.Args.Length == 1
                                     && x.Params[0].ParameterType == x.Args[0])
                         .Select(x => x.Method)
                         .First();

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