array of string with unknown size

Question

How is an array of string where you do not know where the array size in c  NET   String   array   new String       this does not work

User · Answer

As others have mentioned you can use a List lt String gt   which I agree would be a better choice    In the event that you need the String    to pass to an existing method that requires it for instance  you can always retrieve an array from the list  which is a copy of the List lt T gt  s inner array  like this   String   s   yourListOfString ToArray

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You don t have to specify the size of an array when you instantiate it   You can still declare the array and instantiate it later   For instance   string   myArray        myArray   new string size

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I suppose that the array size if a computed value   int size   ComputeArraySize        Then  String   array   new String size

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string    array           it is not null instead it is empty

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Can you use a List strings and then when you are done use strings ToArray   to get the array of strings to work with

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string foo    Apple  Plum  Cherry    string   myArr   null   myArr   foo Split

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I think you may be looking for the StringBuilder class  If not  then the generic List class in string form   List lt string gt  myStringList   new List lt string    myStringList Add  Test 1    myStringList Add  Test 2      Or  if you need to be absolutely sure that the strings remain in order   Queue lt string gt  myStringInOriginalOrder   new Queue lt string    myStringInOriginalOrder Enqueue  Testing       myStringInOriginalOrder Enqueue  1       myStringInOriginalOrder Enqueue  2       myStringInOriginalOrder Enqueue  3         Remember  with the List class  the order of the items is an implementation detail and you are not guaranteed that they will stay in the same order you put them in

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Is there a specific reason why you need to use an array  If you don t know the size before hand you might want to use List lt String gt   List lt String gt  list   new List lt String gt      list Add  Hello    list Add  world    list Add        Console WriteLine list 2      Will give you an output of       MSDN - List T  for more information

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you can declare an empty array like below  String   arr   new String         declare an empty array String   arr2     A    B       declare and assign values to an array arr   arr2     assign valued array to empty array   you can t assign values to above empty array like below  arr 0     A      you can t do this

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You can t create an array without a size  You d need to use a list for that

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If you want to use array without knowing the size first you have to declare it and later you can instantiate it like  string   myArray          myArray new string someItems count

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If you will later know the length of the array you can create the initial array like this   String   array    And later when you know the length you can finish initializing it like this  array   new String 42

[c#] array of string with unknown size

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