Convert a string array to a concatenated string in C#

Question

Is there an easy way to convert a string array into a concatenated string?

For example, I have a string array:

new string[]{"Apples", "Bananas", "Cherries"};

And I want to get a single string:

"Apples,Bananas,Cherries"

Or "Apples&Bananas&Cherries" or "Apples\\Bananas\\Cherries"

Answer 1

A simple one...

string[] theArray = new string[]{"Apples", "Bananas", "Cherries"};
string s = string.Join(",",theArray);

Answer 2

The obvious choise is of course the String.Join method.

Here's a LINQy alternative:

string.Concat(fruit.Select((s, i) => (i == 0 ? "" : ",") + s).ToArray())

(Not really useful as it stands as it does the same as the Join method, but maybe for expanding where the method can't go, like alternating separators...)

Answer 3

String.Join方法（String，String []）

Answer 4

You can use Aggregate , it applies an accumulator function over a sequence.

string[] test = new string[]{"Apples", "Bananas", "Cherries"};
char delemeter = ',';
string joinedString = test.Aggregate((prev, current) => prev + delemeter + current);