Generate list of string from list of objects [duplicate]

Question

I have a list of objects. I am interested in isolating one property of each object, a string value, into a list of strings. How can I create a list of strings using this field only, preferably using Linq and not manually looping?

class MyObj
{
  int ID {get;set;}
  int AnotherID (get;set;}
  string IneedThis {get;set;}
}

List<MyObj> sampleList = somehow_this_is_populated();
List<string> ls = how do I get this list with values equal to "sampleList.IneedThis"

Answer 1

You could try this one:

List<string> ls = sampleList.Select(x=>x.IneedThis).ToList();

Answer 2

Use LINQ.

List<string> ls = sampleList.Select(obj => obj.IneedThis).ToList();

Answer 3

You can Select your property and create a List like:

List<string> ls = sampleList.Select(item => item.IneedThis).ToList();

Make sure your include using System.Linq;

You can also achieve the same with a foreach loop like:

List<string> ls = new List<string>();
foreach (MyObj myObj in sampleList)
{
    ls.Add(myObj.IneedThis);
}

Make sure that your properties in the class are public. In your current class then don't have a access modifier and will be considered private. Define them like:

public string IneedThis { get; set; }