List of strings to string

Question

I have a list of strings:

List<string[]> myList

I want to convert it to a string separated by ",". I know how to convert List myList but not what i need.. I tried

String.Join(", ", myList.ToArray());

But i won't work for string[]

I tried to search the internet for solutions but could not found one... I know i can do it with foreach but im looking for one line solution, mostly to learn more advanced coding.

Thank you!

@Izzy I know, i mean like Daniel said, i wanted to find a function like SelectMany — Or Yagoda
– Or Yagoda, Commented Dec 2, 2015 at 12:49
Looking forward the next super complicated question like "List of ints to string` — Ivan Stoev
– Ivan Stoev, Commented Dec 2, 2015 at 15:08

Yuval Itzchakov · Accepted Answer · 2015-12-02 12:40:54Z

13

You can use Enumerable.SelectMany to flatten your List<string[]>:

string.Join(", ", myList.SelectMany(x => x));

answered Dec 2, 2015 at 12:40

Yuval Itzchakov

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M.kazem Akhgary · Accepted Answer · 2015-12-02 12:58:54Z

4

Use Join twice.

String.Join(", ", myList.Select(arr => "{" + String.Join(", ", arr) + "}"));

As mentioned by @TimSchmelter use this approach when you want to use different delimiters for each group. so you can join inner array by something like , and the outer list by / or any thing you prefer. also you can use braces to make it look better.

BTW if delimiters are same use the approach given by @YuvalItzchakov

edited Dec 2, 2015 at 12:58

answered Dec 2, 2015 at 12:41

M.kazem Akhgary

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1 Comment

Tim Schmelter Over a year ago

Working but why do you use ", " and ",", so one time with space and one time without? OP hasn't mentioned that. This approach would be fine if that was a requirement, otherwise SelectMany is better.

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