String.Join() with string interpolation for string array in C#

Question

I had an issue on using string interpolation in string.join

    string type1 = "a,b,c";
    string[] type2 = new string[3] { "a", "b", "c" };

how to write the string.Join query, below code is just my attempt, but the result is not as expected.

    string result = string.Join(",", $"'{type1}'");

In both cases, the output should be 'a','b','c'

how to use string.Join() with string interpolation for an array of strings

@41686d6564 well, technically a string is an enumerable. However I doubt that´s what OP wants. — MakePeaceGreatAgain
– MakePeaceGreatAgain, Commented Aug 12, 2020 at 7:53
var bob = string.Join(",", type2.Select(z => $"'{z}'")); dotnetfiddle.net/wKYbz8 — mjwills
– mjwills, Commented Aug 12, 2020 at 8:40

Cid · Accepted Answer · 2020-08-12 08:01:04Z

3

If you want to add single quotes around each elements, you can apply a simple .Select() sequence, such as :

var type1 = "a,b,c";
var type2 = new string[3] { "a", "b", "c" };

// using System.Linq;
var result1 = string.Join(',', type1.Split(',').Select(x => $"'{x}'"));
var result2 = string.Join(',', type2.Select(x => $"'{x}'"));

Console.WriteLine($"Type1 : {result1}");
Console.WriteLine($"Type2 : {result2}");

This outputs :

Type1 : 'a','b','c'
Type2 : 'a','b','c'

Fiddle

edited Aug 12, 2020 at 8:01

answered Aug 12, 2020 at 7:59

Cid

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2 Comments

41686d6564 Over a year ago

Yep, based on the OP's comment to the other answer, it looks like that's what they want.

Cid Over a year ago

Well, even based on OP's question

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