Get sub array from a 3D array

Question

If I have an array:

int[,,] mainArray = new int[10,10,3];

How can I get a sub array:

int[] sub = mainArray[0,1]; // Unfortunately this doesn't work

Where sub would contain the 3 elements

sub[0] = mainArray[0,1,0];
sub[1] = mainArray[0,1,1];
sub[2] = mainArray[0,1,2];

It would be easy to write a method to do this but is there a built in way to do it?

Answer 1

I think you can use an extension method like this:

public static class MyExtensions
{
    public static int[] GetValues(this Array source, int x, int y)
    {
        var length = source.GetUpperBound(2);
        var values = new int[length+1];
        for (int i = 0; i < length+1; i++)
        {
            values[i] = (int)source.GetValue(x, y, i);
        }
        return values;
    }
}

Usage:

int[,,] mainArray = new int[10,10,3];
int[] sub = mainArray.GetValues(0, 1);