Create comma separated strings C

Question

I have an object which holds many values  some of them  not all values from the object  need to be put in a csv string  My approach was this   string csvString   o number         o id         o whatever        Somehow I think there is a better  more elegant way

User · Answer

You could override your object s ToString   method   public override string ToString          return string Format    0   1   2    this number  this id  this whatever

User · Answer

If you put all your values in an array  at least you can use string Join   string   myValues   new string            string csvString   string Join      myValues     You can also use the overload of string Join that takes params string as the second parameter like this   string csvString   string Join      value1  value2  value3

User · Answer

Another approach is to use the CommaDelimitedStringCollection class from System Configuration namespace assembly  It behaves like a list plus it has an overriden ToString method that returns a comma-separated string   Pros - More flexible than an array   Cons - You can t pass a string containing a comma   CommaDelimitedStringCollection list   new CommaDelimitedStringCollection     list AddRange new string      Huey    Dewey      list Add  Louie      list Add        string s   list ToString      Huey Dewey Louie

User · Answer

If you re using  Net 4 you can use the overload for string Join that takes an IEnumerable if you have them in a List  too   string Join       strings

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You can use the string Join method to do something like string Join      o Number  o Id  o whatever         edit  As digEmAll said  string Join is faster than StringBuilder  They use an external implementation for the string Join   Profiling code  of course run in release without debug symbols    class Program       static void Main string   args                Stopwatch sw   new Stopwatch            string r          int iter   10000           string   values      a    b    c    d    a little bit longer please    one more time              sw Restart            for  int i   0  i  lt  iter  i                r   Program StringJoin      values           sw Stop            Console WriteLine  string Join   0  times    1 ms   iter  sw ElapsedMilliseconds            sw Restart            for  int i   0  i  lt  iter  i                r   Program StringBuilderAppend      values           sw Stop            Console WriteLine  StringBuilder Append   0  times    1 ms   iter  sw ElapsedMilliseconds           Console ReadLine               static string StringJoin string seperator  params string   values                return string Join seperator  values              static string StringBuilderAppend string seperator  params string   values                StringBuilder builder   new StringBuilder            builder Append values 0            for  int i   1  i  lt  values Length  i                          builder Append seperator               builder Append values i                      return builder ToString              string Join took 2ms on my machine and StringBuilder Append 5ms  So there is noteworthy difference  Thanks to digAmAll for the hint

[c#] Create comma separated strings C#?

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