Question

I am running C# framework 2.0 and I would like to get some of the data from a list? The list is a List<>. How can I do that without looping and doing comparaison manually on each element of the List<>?

Answer 1

You can try Predicate. Here is a code I wrote to illustrate the point. Of course, as you can see in this example, you can move the Predicate outside the calling class and have a control on it. This is useful if you need to have more option with it. Inside the predicate you can do many comparison with all property/function of your object.

   static void Main()     {         List<SimpleObject> list = new List<SimpleObject>();         list.Add(new SimpleObject(1,'Jon'));         list.Add(new SimpleObject( 2,  'Mr Skeet' ));         list.Add(new SimpleObject( 3,'Miss Skeet' ));         Predicate<SimpleObject> yourFilterCriteria = delegate(SimpleObject simpleObject)         {             return simpleObject.Name.Contains('Skeet');         };         list = list.FindAll(yourFilterCriteria);//Get only name that has Skeet : Here is the magic         foreach (SimpleObject o in list)         {             Console.WriteLine(o);         }         Console.Read();     }     public class SimpleObject     {         public int Id;         public string Name;          public SimpleObject(int id, string name)         {             this.Id=id;             this.Name=name;         }          public override string ToString()         {             return string.Format('{0} : {1}',Id, Name);         }     }