How to read a text file and add the data to a int array in C#?

Question

I\'m trying to read a text file which contains numbers separated by a comma. When I read using File.Readline() I get it to a string[]. I need to conver

Answer 1

I think this is what you are after:

    static void Main(string[] args)
    {
        var sr = new StreamReader(@"d:\test.txt");
        long[] data = ExtractData(sr).ToArray();
    }

    private static IEnumerable ExtractData(StreamReader sr)
    {
        string line;
        while ((line = sr.ReadLine()) != null)
        {
            var items = line.Split(',');
            foreach (var item in items)
            {
                yield return Convert.ToInt64(item);
            }
        }
    }

With my test file (d:\test.txt) holding:

1,2,3,4,5
1,2,3,4

I get the array containing:

1,2,3,4,5,1,2,3,4

EDIT

As Monroe pointed out, I missed the fact you wanted an array of arrays. Here's another version that gives such a jagged array. Still keeping yield in though ;)

    static void Main(string[] args)
    {
        var sr = new StreamReader(@"d:\test.txt");
        var data = ExtractData(sr).ToArray();
    }

    private static IEnumerable ExtractData(StreamReader sr)
    {
        string line;
        while ((line = sr.ReadLine()) != null)
        {
            yield return line.Split(',').Select(i => Convert.ToInt64(i)).ToArray();
        }
    }