C#: How to access array methods from parent object?

Question

My ctor return an object which is multidimentional array. Depends on constructor argument, the object returned by ctor can be different rank array, but always int.

object arr = new int[2,2,2];

or

object arr = new int[2,2,2,2,2];

or

object arr = new int[0,0];

Having arr object constructed, and knowing what it is (GetType()), I'd like to access array methods like Rank, GetLength, GetValue etc. How I can access child specific methods from the object level? For now I have only four methods for arr object accessible: Equals, GetHashCode, GetType, and ToString

Can I ask why you have it as a type object in the first place when you know its an integer array? (or similar at least) — Sayse
– Sayse, Commented Aug 5, 2015 at 9:35
You can type it as Array but still that's not a right thing to do. Type it as int[]. Your underlying problem is different. Maybe you need different implementation of the classes for different types of array. — Sriram Sakthivel
– Sriram Sakthivel, Commented Aug 5, 2015 at 9:38
@Sayse: yes I could store it as Array not as an object. Valid point. — user1146081
– user1146081, Commented Aug 5, 2015 at 9:41

blas3nik · Accepted Answer · 2015-08-05 09:37:17Z

1

Cast the object into an array, like this:

((int[])arr).Rank
((int[])arr).GetLength()

or

(arr as int[]).Rank

answered Aug 5, 2015 at 9:37

blas3nik

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user1146081 Over a year ago

believe me or not, but I was just about to answer my question myself. My answer would be the same as yours. Thanks

Paolo Tedesco · Accepted Answer · 2015-08-05 09:37:36Z

1

You could just declare your variable as Array:

Array arr = new int[2,2,2,2,2];
int rank = arr.Rank;

Or cast to Array:

object arr = new int[2,2,2,2,2];
Array array = (Array)arr;

answered Aug 5, 2015 at 9:37

Paolo Tedesco

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Comments

cnom · Accepted Answer · 2015-08-05 09:37:53Z

0

You have to cast it back to an Array object and then these methods will be available!

answered Aug 5, 2015 at 9:37

cnom

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