Convert a list to a string in C

Question

How do I convert a list to a string in C    When I execute toString on a List object  I get      System Collections Generic List 1 System String

User · Answer

If you want something slightly more complex than a simple join you can use LINQ e.g.

var result = myList.Aggregate((total, part) => total + "(" + part.ToLower() + ")");

Will take ["A", "B", "C"] and produce "(a)(b)(c)"

User · Answer

This seems to work for me   var combindedString   new string list ToArray

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If your list has fields properties and you want to use a specific value  e g  FirstName   then you can do this  string combindedString   string Join   quot   quot   myList Select t  gt t FirstName  ToArray

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I am going to go with my gut feeling and assume you want to concatenate the result of calling ToString on each element of the list   var result   string Join      list ToArray

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This method helped me when trying to retrieve data from Text File and store it in Array then Assign it to a string avariable   string   lines   File ReadAllLines Environment CurrentDirectory      Notes txt      string marRes   string Join Environment NewLine  lines ToArray       Hopefully may help Someone

User · Answer

Maybe you are trying to do   string combindedString   string Join       myList ToArray        You can replace     with what you want to split the elements in the list by   Edit  As mention in the comments you could also do  string combindedString   string Join       myList     Reference   Join lt T gt  String  IEnumerable lt T gt    Concatenates the members of a collection  using the specified separator between each member

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You have a List lt string gt  - so if you want them concatenated  something like  string s   string Join     list     would work  in  NET 4 0 at least   The first parameter is the delimiter  So you could also comma-delimit etc   You might also want to look at using StringBuilder to do running concatenations  rather than forming a list

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If you re looking to turn the items in a list into a big long string  do this   String Join     myList    Some older versions of the framework don t allow you to pass an IEnumerable as the second parameter  so you may need to convert your list to an array by calling  ToArray

User · Answer

It s hard to tell  but perhaps you re looking for something like   var myString   String Join String Empty  myList ToArray       This will implicitly call the ToString   method on each of the items in the list and concatenate them

User · Answer

The  ToString   method for reference types usually resolves back to System Object ToString   unless you override it in a derived type  possibly using extension methods for the built-in types    The default behavior for this method is to output the name of the type on which it s called   So what you re seeing is expected behavior   You could try something like string Join       myList ToArray     to achieve this   It s an extra step  but it could be put in an extension method on System Collections Generic List lt T gt  to make it a bit easier   Something like this   public static class GenericListExtensions       public static string ToString lt T gt  this IList lt T gt  list                return string Join       list              Note that this is free-hand and untested code   I don t have a compiler handy at the moment   So you ll want to experiment with it a little

User · Answer

The direct answer to your question is String Join as others have mentioned   However  if you need some manipulations  you can use Aggregate   List lt string gt  employees   new List lt string gt     employees Add  e1    employees Add  e2    employees Add  e3     string employeesString         employees Aggregate  x  y    gt  x           y         Console WriteLine employeesString   Console ReadLine

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You could use string Join   List lt string gt  list   new List lt string gt           Red        Blue        Green      string output   string Join Environment NewLine  list ToArray         Console Write output     The result would be   Red     Blue     Green   As an alternative to Environment NewLine  you can replace it with a string based line-separator of your choosing

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String Join      myList  or String Join      myList ToArray     The first argument is the separator between the substrings   var myList   new List lt String gt     foo   bar   baz    Console WriteLine String Join  -   myList       prints  foo-bar-baz    Depending on your version of  NET you might need to use ToArray   on the list first

[c#] Convert a list to a string in C#

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