c# split string and remove empty string

Question

I want to remove empty and null string in the split operation:

 string number = "9811456789,   ";
 List<string> mobileNos = number.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).Select(mobile => mobile.Trim()).ToList();

I tried this but this is not removing the empty space entry

Answer 1

var mobileNos = number.Replace(" ", "")
.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).ToList();

Answer 2

As I understand it can help to you;

string number = "9811456789, ";
List<string> mobileNos = number.Split(',').Where(x => !string.IsNullOrWhiteSpace(x)).ToList();

the result only one element in list as [0] = "9811456789".

Hope it helps to you.

Answer 3

The easiest and best solution is to use both StringSplitOptions.TrimEntries to trim the results and StringSplitOptions.RemoveEmptyEntries to remove empty entries, fed in through the pipe operator (|).

string number = "9811456789,   ";
List<string> mobileNos = number
    .Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries)
    .ToList();

Checkout the below test results to compare how each option works,

Answer 4

a string extension can do this in neat way as below the extension :

        public static IEnumerable<string> SplitAndTrim(this string value, params char[] separators)
        {
            Ensure.Argument.NotNull(value, "source");
            return value.Trim().Split(separators, StringSplitOptions.RemoveEmptyEntries).Select(s => s.Trim());
        }

then you can use it with any string as below

 char[] separator = { ' ', '-' };
 var mobileNos = number.SplitAndTrim(separator);

Answer 5

I know it's an old question, but the following works just fine:

string number = "9811456789,   ";
List<string> mobileNos = number.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries).ToList();

No need for extension methods or whatsoever.

Answer 6

"string,,,,string2".Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);

return ["string"],["string2"]

Answer 7

If you are using Linq. This work for me.

string temp = "a,b,   ,c,  ";    
List<string> result = temp.Split(',').Where(i => string.IsNullOrWhiteSpace(i) == false).ToList();