Question

I would be grateful if somebody tell me how should I declare a dynamic multidimensional array in ref class? Can somebody post a sample code?

Answer 1

If you can afford array reallocations, then use the array type.

You can either use the “array of arrays” construction

/// Declaration
array<array<SomeType>^>^ arr;

/// Inititalization

arr = gcnew array<array<SomeType>^> (NumElts1);

for(int i=0 ; i < NumElts1 ; i++)
{
  arr[i] = gcnew array<SomeType> (NumElts2);
}

or just the multidimensional ones:

array<SomeType, NumDims> ^ Arr =
        gcnew array<SomeType, NumDims>(NumElts1, NumElts2, ....);

Everything is garbage-collected so you don’t worry about destroying them.

If you really need the “dynamic” arrays, then you might look for System.Collections.Generic.List<T> and use “List of Lists”. Lists have the ToArray() method.

EDIT:

The array type in C++/CLI is a template:

template<typename T, int NumDims = 1>
ref class array: System::Array
{
    // black magic here
}

So you may use it for 1D-array without second argument.

array<SomeType>^ Arr = gcnew array<SomeType>(SizeOfThisArray);