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Posted 23 Jun 2011

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String concatenation using LINQ to create a CSV/PSV string

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26 Jun 2011CPOL
A tip to concatenate a set of strings using comma/pipe

Consider you have a set of string names: Chin, Rahul, and John. And you would like to build a comma separated string from the collection. We can do this using the Aggregate extension in LINQ as follows:

IEnumerable<string> sList = 
  new List<string> {"Chin", "Rahul", "John"};
var commaSeparated = sList.Aggregate((x, y) => x + "," + y);
var pipeSeparated = sList.Aggregate((x, y) => x + "|" + y);

Here is the expected output:



This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Comments and Discussions

GeneralI think this will be slower compared to the string.Join meth... Pin
RakeshMeena26-Jun-11 19:18
RakeshMeena26-Jun-11 19:18 
GeneralWhat is the performance difference between that and Join(sLi... Pin
dgauerke26-Jun-11 10:04
dgauerke26-Jun-11 10:04 
GeneralWill it not be slow enough to go this way?! Pin
Ravi Sant26-Jun-11 8:37
Ravi Sant26-Jun-11 8:37 
GeneralYou need to think about escaping as well as (pointed out alr... Pin
Henry.Ayoola23-Jun-11 21:34
Henry.Ayoola23-Jun-11 21:34 
You need to think about escaping as well as (pointed out already by @AspDotNetDev) not doing naïve string composition in a loop.
GeneralThink there are syntax errors in the code. list.Aggregate sh... Pin
George Swan23-Jun-11 20:16
mveGeorge Swan23-Jun-11 20:16 
GeneralRe: a type mistake. thanks for pointing out. Pin
JP_Rocks26-Jun-11 8:35
JP_Rocks26-Jun-11 8:35 
GeneralWould work OK for short lists. Would probably go with a Stri... Pin
AspDotNetDev23-Jun-11 5:16
protectorAspDotNetDev23-Jun-11 5:16 

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