how to create a one-dimensional dynamic array in c#?

Question

noob question on c#: how to create a one-dimensional dynamic array? And how to change it later?

thanks.

Answer 1

Sure sounds like you should look into List<T> instead.

Answer 2

Instead of using an array, you can use the List<> object in C#.

List<int> integerList = new List<int>();

To iterate on items contained in the list, use the foreach operator :

foreach(int i in integerList)
{
    // do stuff with i
}

You can add items in the list object with Add() and Remove() functions.

for(int i = 0; i < 10; i++)
{
    integerList.Add(i);
}

integerList.Remove(6);
integerList.Remove(7);

You can convert a List<T> to an array using the ToArray() function :

int[] integerArray = integerList.ToArray();

Here is the documentation on List<> object.

Answer 3

use either:

ArrayList  //really you should avoid this.
or List<T>

so

var my_list = new List<Your_List_Type_Here>() (Like List<String>);

This way to add you just do:

my_list.Add(Your_Object);

Link to Generic List: http://msdn.microsoft.com/en-us/library/6sh2ey19.aspx

if you want to go back to an array then just call the ToArray() method.

Answer 4

Arrays are not dynamic. If you want something dynamic use a 'List<T>' or some other collection. You can always call the ToArray() method on it to get an array back.

Answer 5

As others have mentioned, a List<T> is likely what you want. But for completeness, you can resize an array using the Array.Resize static method. Example:

int[] array = { 1, 2, 3 };
Array.Resize(ref array, 4);