Split a string with condition

Question

I have a string variable that contains csv value like this:

string str = "105, c#, vb, 345, 53, sql51";

so now i want to get only alphanumeric items in a list or array without using loop.

required result:

string result = "c#, vb, sql51";

Or in list Or in array...

Answer 1

string str = "105, c#, vb, 345, 53, sql51";
var separator = ", ";
int dummy;

var parts = str.Split(new[]{separator}, StringSplitOptions.RemoveEmptyEntries)
               .Where(s => !int.TryParse(s, out dummy));

string result = string.Join(separator, parts);

Console.WriteLine(result);

prints:

c#, vb, sql51

Answer 2

Split using the Split method, filter with a LINQ expression, and call ToArray or ToList on the result to produce a filtered array:

var res = str
    .Split(new[] {',', ' '})
    .Where(s => s.Any(c => !Char.IsDigit(c)))
    .ToList();

Demo on ideone.

Answer 3

Something like:

var str = "test,test,tes,123,5";
var result = string.Join(",", str.Split(',').Where(s => !s.All(t => Char.IsNumber(t))));
result.Dump();

Answer 4

"105, c#, vb, 345, 53, sql51".Split(",")
       .Where(item => new Regex("[#A-Za-z0-9]").IsMatch(item))
           .Select(item=> item.Trim())
                 .ToList();

Note: Not sure why the OP wants the numbers filtered out-- Numbers are alphanumeric.