Convert a list of objects to an array of one of the object s properties

Question

Say I have the following class   public class ConfigItemType       public string Name   get  set        public double SomeOtherThing   get  set        and then I make a list of the following classes  List lt ConfigItemType gt  MyList   Now I have a method with the following signature   void AggregateValues string someUnrelatedValue  params string   listGoesHere    How can I fit MyList in to the listGoesHere using the value in ConfigItemType Name as the params string array   I am fairly sure that Linq can do this     but MyList does not have a select method on it  which is what I would have used

User · Accepted Answer

You are looking for  MyList Select x  gt x Name  ToArray      Since Select is an Extension method make sure to add that namespace by adding a   using System Linq   to your file - then it will show up with Intellisense

User · Answer

This should also work   AggregateValues  hello   MyList ConvertAll c   gt  c Name  ToArray

User · Answer

For everyone who is stuck with  NET 2 0  like me  try the following way  applicable to the example in the OP    ConfigItemList ConvertAll lt string gt  delegate  ConfigItemType ci         return ci Name      ToArray      where ConfigItemList is your list variable

User · Answer

I am fairly sure that Linq can do this     but MyList does not have a select method on it  which is what I would have used     Yes  LINQ can do this  It s simply   MyList Select x   gt  x Name  ToArray      Most likely the issue is that you either don t have a reference to System Core  or you are missing an using directive for System Linq

[c#] Convert a list of objects to an array of one of the object's properties

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