inserting a value

csharp beginner

I want to insert some values to an array.

The array would not have any fixed size and would be containing some elements. Now, what i want to do is : insert certain elements(values), at certain index positions. But, the element which was already there at that index position would not be deleted, else would be shifted a position next. Thus, inserting a new element at the required position and also keeping all the elements without deleting any, at the mean while, the size of the array would also be increased (as obviously).

Example:

int[] arr = { 22, 32, 45, 68, 92};

If i insert an element (say, 46) at 2nd position in the array, then, array should become

arr = {22, 46, 32, 45, 68, 92}

Can anybody help?

Regards

2 Replies

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Vulpes13y ago
Accepted answer
Try this:

using System;

class Program
{
static void Main()
{
int[] arr = { 22, 32, 45, 68, 92};
Array.Resize(ref arr, arr.Length + 1); // make array one bigger

for(int i = arr.Length - 2; i >= 1; i--)
{
arr[i + 1] = arr[i]; // move elements from insertion point higher up the array
}

arr[1] = 46; // insert new element

// check it worked
foreach(int i in arr) Console.Write("{0} ", i);
Console.ReadKey();
}
}

However, if you want a resizable array, I'd consider using an ArrayList or List instead which automatically resize as new elements are added or inserted.
csharp beginner13y ago
Thank You Vulpes. This is what, i exactly needed. You Rock..!