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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5. public class Test
  6. {
  7. 	public class GrandParent{
  8. 		public List<Parent> parentList{ get; set; }
  9. 		public string name{ get; set; }
  10. 		public GrandParent(string name){
  11. 			this.name = name;
  12. 			this.parentList = new List<Parent>();
  13. 		}
  14. 	}
  15. 	public class Parent{
  16. 		public List<Child> childList{ get; set;}
  17. 		public string name{ get; set; }
  18. 		public Parent(string name){
  19. 			this.name = name;
  20. 			this.childList = new List<Child>();
  21. 		}
  22. 	}
  23. 	public class Child{
  24. 		public string city{ get; set;}
  25. 		public Child(string city){
  26. 			this.city = city;
  27. 		}
  28. 	}
  29. 	public static void Main()
  30. 	{
  31. 		Child c1 = new Child("ABC"), c2 = new Child("123"), c3 = new Child("tmp");
  32. 		Parent p1 = new Parent("p1"), p2 = new Parent("p2"), p3 = new Parent("p3");
  33. 		GrandParent g1 = new GrandParent("g1"), g2 = new GrandParent("g2"), g3 = new GrandParent("g3");
  34.  
  35. 		p1.childList.Add(c1); p1.childList.Add(c2); 
  36. 		p2.childList.Add(c2); 
  37. 		p3.childList.Add(c3);
  38.  
  39. 		g1.parentList.Add(p1); g1.parentList.Add(p2); g1.parentList.Add(p3);
  40. 		g2.parentList.Add(p2);
  41. 		g3.parentList.Add(p3);
  42.  
  43. 		List<GrandParent> repo = new List<GrandParent>{g1, g2, g3};
  44.  
  45. 		var filteredParents = from g in repo
  46.                     		  from p in g.parentList
  47.                     		  where p.childList.Any(c => c.city == "tmp")
  48.                     		  select new Parent(p.name){
  49.                     		 	 childList = p.childList.Where(c => c.city == "tmp").ToList()
  50.                     		  };
  51.  
  52.      	var filteredGrandParents = from g in repo
  53.      							   from p in g.parentList
  54.      							   where filteredParents.Any(fp => fp.name == p.name)
  55.      							   select new GrandParent(g.name){
  56.      							   	   parentList = g.parentList.Where(pp => filteredParents.Any(fp => fp.name == pp.name)).ToList()
  57.      							   };
  58.  
  59.         foreach(var g in filteredGrandParents){
  60.         	Console.WriteLine(g.name);
  61.         	foreach(var p in g.parentList){
  62.         		Console.WriteLine("\t" + p.name);
  63.         		foreach(var c in p.childList){
  64.         			Console.WriteLine("\t\t" + c.city);
  65.         		}
  66.         	}
  67.         	Console.WriteLine();
  68.         }
  69. 	}
  70. }
Success #stdin #stdout 0.01s 131520KB
comments (?)
stdin
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Standard input is empty
stdout
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g1
	p3
		tmp

g3
	p3
		tmp
https://ideone.com/MO6M6t
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
secret

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