How can I convert comma separated string into a List

Question

string tags = \"9,3,12,43,2\"

List TagIds = tags.Split(\',\');

This doesn\'t work cause the split method returns a string[]

Answer 1

You can use LINQ w/ int.Parse() to convert the string[] to an IEnumerable<int> and then pass that result to the List<T> constructor:

var tagIds = new List<int>(tags.Split(',').Select(s => int.Parse(s)));

Answer 2

Without LINQ Query , you can choose this method ,

string tags = "9,3,12,43,2";
List<string> numbers = nos.Split(',').ToList<string>();

and then you can convert this List into integer type...

Answer 3

I stumbled upon this and I just want to share my own solution without linq. This is a primitive approach. Non-integer values will not be added in the list also.

List<int> TagIds = new List<int>();
string[] split = tags.Split(',');
foreach (string item in split)
{
    int val = 0;
    if (int.TryParse(item, out val) == true)
    {
        TagIds.Add(val);
    }
}

Hope this helps.

Answer 4

string tags = "9,3,12,43,2"

List<int> TagIds = tags.Split(',').Select(x => x.Trim()).Select(x=> Int32.Parse(x)).ToList();

Answer 5

A little LINQ goes a long way:

 List<int> TagIds = tags.Split(',')
         .Select(t => int.Parse(t))
         .ToList();

Answer 6

If you are using C# 3.5 you can use Linq to achieve this

string tags = "9,3,12,43,2";
List<int> tagIds = tags.Split(',').Select(s=>int.Parse(s)).ToList();

or the short one

string tags = "9,3,12,43,2";
List<int> tagIds = tags.Split(',').Select(int.Parse).ToList();