multidimensional array of object c#

Question

I use an array of array :

object[][] of =new object[lenght2][];

Now, what i want is to insert a new array into of[][], I try this :

 for (int i = 0; i < lenght2; i++)
  {
      Act = calcul_resporderbyact(responsable,v); // return array of object
      of[i] = Act;
 }

i want to know how to use some array from this multidimensional-array ??

start by saying what 'dont work' means, then what exactly are you trying to do? — Sayse, Sep 18 '13 at 06:50
@Anirudh `object[,] of =new object[lenght2,];` won't compile, you need to specify both lenghts like `object[,] of =new object[lenght1,lenght2];` — Kamil Budziewski, Sep 18 '13 at 06:52
Instead of creating of array of arrays You can try using List — Naren, Sep 18 '13 at 06:55
@Naren I don't know how its being used, for example, it could be used in a loop where the iterator is hardcoded (i.e `i < 5`) — Sayse, Sep 18 '13 at 07:07

score 5 · Accepted Answer · edited May 23 '17 at 12:28

5

You have couple of mistakes, in your code object[,] of =new object[lenght2][];

[,] is not equal to [][]

you can try this:

object[][] of = new object[length2][];
of[i] = Act; //it means you can assign `new[] { new object() };`

it says that [,] is multidimensional array and [][] is array of arrays. So for your use array of arrays is valid.

edited May 23 '17 at 12:28

Community

answered Sep 18 '13 at 06:55

Kamil Budziewski

score 1 · Answer 2 · answered Sep 18 '13 at 06:56

In C# there are jagged arrays and multidimensional arrays. In your example you seem to be mixing up the two.

Jagged arrays are created this way, and you'll have to construct each "sub-array" individually:

object[][] obj = new object[10][];
obj[0] = new object[10];
obj[1] = new object[10];
...

Multidimensional arrays on the other hand:

object[,] obj = new object[10,10];

Thorsten Dittmar · Answer 3 · 2013-09-18T07:55:15.783

Multidimensional arrays (as opposed to jagged arrays) are always "rectangular", meaning that the length of each entry in the array is also fixed.

If you want just a list of arrays, which can have different lengths, then use List<object[]> as in

List<object[]> l = new List<object[]>();
l.Add(calcul_resporderbyact(responsable,v));

Or you could use a jagged array:

object[][] l = new object[length2][];
l[i] = calcul_resporderbyact(responsable,v);

3 Answers3