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  1. using System;
  2. using System.Linq;
  3. using System.Collections;
  4. using System.Collections.Generic;
  5. using System.Reflection;
  6.  
  7. public class Program {
  8.     static void Main(string[] args)
  9.     {
  10.         object x = 2;
  11.         var a = new A();
  12.     	a.Val = x;
  13.     	a.array = new A[3] { a, new A() { Val = "a"}, null};
  14.  
  15.  
  16.         var b = new A();
  17.         b.Val = x;
  18.     	b.array = new A[3] { b, new A() { Val = "a"}, null};
  19.  
  20.         a.array[2] = b;
  21.         b.array[2] = b;
  22.  
  23.     	Console.WriteLine(string.Join("\n", FindStringValues(a).ToArray()));
  24.     }
  25.  
  26.     public class A {
  27.     	public A[] array {get;set;}
  28.     	public object Val {get;set;}
  29.     }
  30.  
  31.     private static IEnumerable<string> FindStringValues(object obj) {
  32.     	return _FindStringValues(obj, new List<object>());
  33.     }
  34.  
  35.     private static IEnumerable<string> _FindStringValues(object obj, IList<object> visitedObjects)
  36.     {	
  37.         if (obj == null)
  38.             yield break;
  39.  
  40.        // Console.WriteLine(string.Join("; ", visitedObjects.Select(i => i.ToString()).ToArray()));
  41.         if (visitedObjects.Any(item => Object.ReferenceEquals(item, obj)))
  42.             yield break;
  43.  
  44.         if (!(obj is string))
  45.             visitedObjects.Add(obj);
  46.  
  47.         Type type = obj.GetType();
  48.  
  49.         if (type == typeof(string)) {
  50. 			yield return (obj).ToString();
  51.             yield break;
  52. 		}
  53.  
  54.         if (typeof(IEnumerable).IsAssignableFrom(type))
  55. 		{
  56. 			var array = obj as IEnumerable;
  57. 			foreach (var item in array)
  58. 				foreach (var str in _FindStringValues(item, visitedObjects))
  59. 					yield return str;
  60.  
  61.             yield break;
  62. 		}
  63.  
  64.         if (type.IsClass)
  65. 		{
  66. 			FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
  67. 			foreach (FieldInfo field in fields)
  68. 			{
  69. 				object item = field.GetValue(obj);
  70.  
  71.                 if (item == null)
  72. 					continue;
  73.  
  74.  
  75. 				foreach (var str in _FindStringValues(item, visitedObjects))
  76. 					yield return str;
  77. 			}
  78.  
  79.             yield break;
  80. 		}    	
  81.     }
  82. }
Success #stdin #stdout 0.03s 33944KB
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https://ideone.com/VON1Zm
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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