Coping array from matlab to C#/.NET array

Question

Alaster Meehan 2023-8-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2010722-coping-array-from-matlab-to-c-net-array

回答： Animesh 2023-8-31

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?

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Answer 1

Animesh 2023-8-31

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https://ww2.mathworks.cn/matlabcentral/answers/2010722-coping-array-from-matlab-to-c-net-array#answer_1297926

在 MATLAB Online 中打开

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);