convert List to array using C#

Question

I am trying to convert a list that I pulled from an API and convert it to a list. The list does return other data but i have code in there to return just the data I want( it could be wrong)

//this pulls the data
public List<AccountBalance> CorpAccounts(int CORP_KEY, string CORP_API, int USER)
{
    List<AccountBalance> _CAccount = new List<AccountBalance>();
    EveApi api = new EveApi(CORP_KEY, CORP_API, USER);
    List<AccountBalance> caccount = api.GetCorporationAccountBalance();
    foreach (var line in caccount)
    {

        //everyting after
        string apiString = line.ToString();
        string[] tokens = apiString.Split(' ');
        _CAccount.Add(line);
    }
    return _CAccount;
}


//I am trying to convert the list to the array here
private void docorpaccounts()
{
    string[] corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER).ToArray();
}

With that code I get this error:

Error 1 Cannot implicitly convert type 'EveAI.Live.AccountBalance[]' to 'string[]'

Not sure what I am doing wrong here.

Error is self describing that you need AccountBalance[] instead of string[]. — Rohit Vats
– Rohit Vats, Commented Aug 17, 2013 at 18:09
I think to fix your problem you'd want to change List<AccountBalance> _CAccount = new List<AccountBalance>(); to List<string> _CAccount = new List<string>();. And also public List<AccountBalance> CorpAccounts() to public List<string> CorpAccounts. That's one way you could fix your problem — davidsbro
– davidsbro, Commented Aug 17, 2013 at 18:10

MarcinJuraszek · Accepted Answer · 2013-08-17 18:10:34Z

4

You're trying to assign AccountBalance[] into string[] - as error says.

Unless you really need string[] you should change variable declaration to AccountBalance[]:

private void docorpaccounts()
{
    AccountBalance[] corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER).ToArray();
}

Or specify how the AccountBalance should be transformed to be a string. e.g. using ToString method:

private void docorpaccounts()
{
    string[] corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER)
                           .Select(x => x.ToString())
                           .ToArray();
}

or one of its properties

private void docorpaccounts()
{
    string[] corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER)
                           .Select(x => x.MyStringProperty)
                           .ToArray();
}

answered Aug 17, 2013 at 18:10

MarcinJuraszek

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kmatyaszek · Accepted Answer · 2013-08-17 18:26:47Z

1

List<T>.ToArray Method (msdn)

Syntax:

public T[] ToArray()

So if you have List<AccountBalance> you should have AccountBalance[] when you invoke ToArray method.

Try this:

AccountBalance[] corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER).ToArray();

As @BenjaminGruenbaum mention in comment, the better option will be using var keyword (msdn):

var corpbal = cwaa.CorpAccounts(CORP_KEY, CORP_API, USER).ToArray();

edited Aug 17, 2013 at 18:26

answered Aug 17, 2013 at 18:08

kmatyaszek

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1 Comment

Benjamin Gruenbaum Over a year ago

Or just use var and let type inference work it's magic and abstract thinking about this sort of thing from you.

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