IEnumerable to string

Question

I have a DataTable that returns

IDs
,1
,2
,3
,4
,5
,100
,101

I want to convert this to single string value, i.e:

,1,2,3,4,5,100         


        

Answer 1

Write an extension method such as

public static String AppendAll(this IEnumerable collection, String seperator)
{
    using (var enumerator = collection.GetEnumerator())
    {
        if (!enumerator.MoveNext())
        {
            return String.Empty;
        }

        var builder = new StringBuilder().Append(enumerator.Current);

        while (enumerator.MoveNext())
        {
            builder.Append(seperator).Append(enumerator.Current);
        }

        return builder.ToString();
    }
}

and assuming the result of your previous expression is IEnumerable, call:

var _values = _tbl.AsEnumerable().Select(x => x).AppendAll(String.Empty);