檢查，如果對象有方法與委託

Question

的簽名我如何檢查是否一個對象具有特定的委託

public delegate T GetSomething<T>(int aParameter); 
    public static void Method<T>(object o, GetSomething<T> gs) 
    { 
     //check if 'o' has a method with the signature of 'gs' 
    } 

Answer 1

相同簽名的方法你可以做類型具有相同的返回類型，並且參數中的類型序列相同：

var matchingMethods = o.GetType().GetMethods().Where(mi => 
    mi.ReturnType == gs.Method.ReturnType 
    && mi.GetParameters().Select(pi => pi.ParameterType) 
     .SequenceEqual(gs.Method.GetParameters().Select(pi => pi.ParameterType))); 

Answer 2

// You may want to tweak the GetMethods for private, static, etc... 
foreach (var method in o.GetType().GetMethods(BindingFlags.Public)) 
{ 
    var del = Delegate.CreateDelegate(gs.GetType(), method, false); 
    if (del != null) 
    { 
     Console.WriteLine("o has a method that matches the delegate type"); 
    } 
}