Coping array from matlab to C#/.NET array

I have a dll from C# that i'm interfacing with. It has a structure that contains an array that I need to put data into.

This sets up the two arrays, in my actual problem the "destination" variable is in a structure but it shouldn't matter in this example.

MatArray = [1:10];

MatArray = int32(MatArray);

destination = NET.createArray('System.Int32', 10);

This can be copied item by item but for any decent size array this takes a long time.

% slow

for j = 1:numel(MatArray)

destination(j) = MatArray(j);

end

A faster way but a bit ulgy is to make a temp jaggered array then copy the data using a System.Array.Copy. This will also use up unnecessary memory, which may become an issue for very large arrays.

% fast but ulgy

temp = NET.createArray('System.Int32[]', 10);

temp(1) = MatArray;

System.Array.Copy(temp(1),destination,10);

Is there a better way to copy data from a matlab array into a c# array?

Answer 1

[Animesh]

Hello @Alaster Meehan,

I understand that you want to copy a matlab array to a C# array using MATLAB or C#.

You can try to use the ToArray method provided by the MATLAB int32 array to convert it to a regular C# array, and then assign it directly to the C# array.

Here is an example of how you can achieve this using C#:

// Assuming you have a C# array called "destination" and a MATLAB int32 array called "MatArray"

// Convert the MATLAB array to a C# array using the ToArray method
int[] temp = MatArray.ToArray();

// Copy the data from the temp array to the destination array
Array.Copy(temp, destination, temp.Length);

By using the ToArray method, you can directly convert the MATLAB array to a C# array without the need for intermediate steps or temporary arrays.

To read more about ToArray, please refer to the following documentation :- https://www.mathworks.com/help/dotnetbuilder/MWArrayAPI/html/M_MathWorks_MATLAB_NET_Arrays_MWArray_ToArray.htm