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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Linq.Expressions;
  5. using System.Reflection;
  6. using System.Text;
  7.  
  8. namespace MyNamespace
  9. {
  10.     public static class MethodSupport<T>
  11.     {
  12.         public static string ActionName(Expression<Func<T, Action>> expression)
  13.         {
  14.             return MethodName(expression);
  15.         }
  16.  
  17.         public static string ActionName<TParam>(Expression<Func<T, Action<TParam>>> expression)
  18.         {
  19.             return MethodName(expression);
  20.         }
  21.  
  22.         public static string FuncName<TResult>(Expression<Func<T, Func<TResult>>> expression)
  23.         {
  24.             return MethodName(expression);
  25.         }
  26.  
  27.         public static string FuncName<TParam, TResult>(Expression<Func<T, Func<TParam, TResult>>> expression)
  28.         {
  29.             return MethodName(expression);
  30.         }
  31.  
  32.         private static bool IsNET45 = Type.GetType("System.Reflection.ReflectionContext", false) != null;
  33.  
  34.         public static string MethodName(LambdaExpression expression)
  35.         {
  36.             var unaryExpression = (UnaryExpression)expression.Body;
  37.             var methodCallExpression = (MethodCallExpression)unaryExpression.Operand;
  38.  
  39.             if (IsNET45)
  40.             {
  41.                 var methodCallObject = (ConstantExpression)methodCallExpression.Object;
  42.                 var methodInfo = (MethodInfo)methodCallObject.Value;
  43.                 return methodInfo.Name;
  44.             }
  45.             else
  46.             {
  47.                 var methodInfoExpression = (ConstantExpression)methodCallExpression.Arguments.Last();
  48.                 var methodInfo = (MemberInfo)methodInfoExpression.Value;
  49.                 return methodInfo.Name;
  50.             }
  51.  
  52.         }
  53.     }
  54.  
  55.     public class MyClass
  56.     {
  57.         public void Foo() { }
  58.  
  59.         public void Fooz(int e) { }
  60.  
  61.         public int Bar() { return 1; }
  62.  
  63.         public int Barz(int c) { return 1; }
  64.     }
  65.  
  66.     public class Program
  67.     {
  68.  
  69.         public static void AssertAreEqual(string first, string second)
  70.         {
  71.             if (first != second)
  72.                 Console.WriteLine("{0} != {1}", first, second);
  73.             else
  74.                 Console.WriteLine("{0} == {1}", first, second);
  75.         }
  76.  
  77.         public static void Main(string[] args)
  78.         {
  79.             AssertAreEqual("Foo", MethodSupport<MyClass>.ActionName(c => c.Foo));
  80.  
  81.             AssertAreEqual("Fooz", MethodSupport<MyClass>.ActionName<int>(c => c.Fooz));
  82.  
  83.             AssertAreEqual("Bar", MethodSupport<MyClass>.FuncName<int>(c => c.Bar));
  84.  
  85.             AssertAreEqual("Barz", MethodSupport<MyClass>.FuncName<int, int>(c => c.Barz));
  86.         }
  87.     }
  88. }
  89.  
Success #stdin #stdout 0.04s 34040KB
comments (?)
stdin
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Standard input is empty
stdout
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Foo == Foo
Fooz == Fooz
Bar == Bar
Barz == Barz
https://ideone.com/YVsSOO
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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