List<String> A = new List<string>();
A.Add("1");
A.Add("2");
A.Add("3");
string joined = String.Join("\",\"", A);
So geting output string like 1","2","3
But we requred joined= "1","2","3"
How can this possible
thanks
2 Answers
string joined = "\"" + String.Join("\",\"", A) + "\"";
or maybe
string joined = String.Join(",", A.Select(s => "\"" + s + "\""));
4 Comments
Jon Skeet
The first of these looks cleaner to me, in that it will produce far fewer temporary strings.
cnd
@JonSkeet for perfomance / computer - yes, for human - second variant should be better because you read code as logic without guessing the trick... regualr deal.
Jon Skeet
Yes, that's true. Maybe this calls for a custom JoinSurrounded method :)
cnd
@JonSkeet I bet you can write such method with plain
IL :DThe String.Join method joins multiple items in a collection using the delimiter you specify.
So when you run this line of code:
string joined = String.Join("\",\"", A);
You've specified that the delimiter that separates your items is a comma in quotes:
","
That string only appears between items, not before the first one or after the last one.
You'll have to add a quote before the first and after the last manually.
",", the output would be like this: item1<separator>item2<separator>item3 (in your case separator is","). if you want heading and trailing double quote, you should add it manually.