问题
I'm trying to marshal a 2D C# jagged array (double[][] jaggedArray) to a C++ dll where i've specified the receiving variable to be a double**.
However, i'm getting the message:
There is no marshaling support for nested arrays.
Short of flattening the jagged array is there a way to use jagged arrays from C# in a C++ dll?
回答1:
Using low level Marshal class methods, it is possible to marshal any type to unmanaged memory. For example, for every double[] array in jaggedArray, allocate unmanaged memory block with Marshal.AllocHGlobal, and copy array members to it using Marshal.Copy Method (Double[], Int32, IntPtr, Int32) method. AllocHGlobal returns IntPtr type, which can be passed to C++ method as poiner, double* in this case.
来源：https://stackoverflow.com/questions/6327196/marshalling-c-sharp-jagged-array-to-c