How to Get a Sublist in C

Question

I have a List lt String gt  and i need to take a sublist out of this list  Is there any methods of List available for this in  NET 3 5

User · Answer

Reverse the items in a sub-list  int   l    0  1  2  3  4  5  6   var res   new List lt int gt     res AddRange l Where  n  i    gt  i  lt  2    res AddRange l Where  n  i    gt  i  gt   2  amp  amp  i  lt   4  Reverse     res AddRange l Where  n  i    gt  i  gt  4      Gives 0 1 4 3 2 5 6

User · Answer

With LINQ   List lt string gt  l   new List lt string gt     1    2    3    4   5    List lt string gt  l2   l Skip 1  Take 2  ToList      If you need foreach  then no need for ToList   foreach  string s in l Skip 1  Take 2       Advantage of LINQ is that if you want to just skip some leading element you can    List lt string gt  l2   l Skip 1  ToList    foreach  string s in l Skip 1       i e  no need to take care of count length  etc

User · Answer

Your collection class could have a method that returns a collection  a sublist  based on criteria passed in to define the filter   Build a new collection with the foreach loop and pass it out     Or  have the method and loop modify the existing collection by setting a  filtered  or  active  flag  property    This one could work but could also cause poblems in multithreaded code   If other objects deped on the contents of the collection this is either good or bad depending of how you use the data

User · Answer

Use the Where clause from LINQ   List lt object gt  x   new List lt object gt     x Add  A    x Add  B    x Add  C    x Add  D    x Add  B     var z   x Where p   gt  p     A    z   x Where p   gt  p     B      In the statements above  p  is the object that is in the list  So if you used a data object  i e    public class Client       public string Name   get  set        then your linq would look like this   List lt Client gt  x   new List lt Client gt     x Add new Client     Name    A      x Add new Client     Name    B      x Add new Client     Name    C      x Add new Client     Name    D      x Add new Client     Name    B       var z   x Where p   gt  p Name     A    z   x Where p   gt  p Name     B

User · Answer

You want List  GetRange firstIndex  count    See http   msdn microsoft com en-us library 21k0e39c aspx     I have a List called list List sublist   list GetRange 5  5       gets elements 5 6 7 8 9  List anotherSublist   list GetRange 0  4      gets elements 0 1 2 3    Is that what you re after   If you re looking to delete the sublist items from the original list  you can then do      list is our original list    sublist is our  newly created  sublist built from GetRange   foreach  Type t in sublist        list Remove t

User · Answer

Would it be as easy as running a LINQ query on your List   List lt string gt  mylist   new List lt string gt    hello   world   foo   bar    List lt string gt  listContainingLetterO   mylist Where x  gt x Contains  o    ToList

[c#] How to Get a Sublist in C#

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