how to convert an array of objects to list

Question

Possible Duplicate:
Conversion of System.Array to List

I want to convert the aPersonDataArr to a list IList<aPersonDataArr> aPerList = ??? and viceVersa - from list to array. How can this be done, I am not willing to use LINQ. Is there any other way to do it?

class PersonData
{
    public string PersonName;
    public int Age;
}
class Program
{
    static void Main(string[] args)
    {
        PersonData[] aPersonDataArr = new PersonData[2];

        for (int i = 0; i < aPersonDataArr.Length; i++)
        {
            aPersonDataArr[i].PersonName = "abcd";
            aPersonDataArr[i].Age = 10;
        }    
    }
}

*Why* are you not willing to use LINQ? And why are you creating an array in the first place, rather than using a list throughout? — Jon Skeet, Oct 18 '12 at 06:25

Habib · Accepted Answer · 2012-10-18T06:30:12.830

12

Just pass the array in List constructor.

IList<PersonData> aPerList = new List<PersonData>(aPersonDataArr);

To Convert back:

PersonData[] array = aPerList.ToArray();

If you don't want to use LINQ ToArray then Use List.CopyTo:

PersonData[] newArray = new PersonData[aPerList.Count];
aPerList.CopyTo(arrArray,0);

edited Oct 18 '12 at 06:30

answered Oct 18 '12 at 06:24

Habib

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Technically `ToArray()` is part of LINQ. – H H Oct 18 '12 at 06:28
@HenkHolterman, Yes its not, I just specified `list.CopyTo` in my answer – Habib Oct 18 '12 at 06:30

score 1 · Answer 2 · answered Oct 18 '12 at 06:24

1

Using Linq:

PersonData[] aPersonDataArr = new PersonData[2];
List<PersonData> list = aPersonDataArr.ToList();

Without using Linq:

List<PersonData> list = new List<PersonData>(aPersonDataArr );

answered Oct 18 '12 at 06:24

jags

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score 0 · Answer 3 · answered Oct 18 '12 at 07:00

0

    //array into list
    List<PersonData> list1 = new List<PersonData>(aPersonDataArr);

    //list into array
    Array array1 = list1.ToArray();

answered Oct 18 '12 at 07:00

Dean

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how to convert an array of objects to list

3 Answers3