将 C# 锯齿状数组编组到 C++ [英] Marshalling C# Jagged Array to C++
问题描述
我正在尝试将 2D C# 锯齿状数组 (double[][] jaggedArray
) 编组到 C++ dll,其中我已将接收变量指定为 double**
.
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**
.
但是,我收到消息:
没有编组支持嵌套数组.
There is no marshaling support for nested arrays.
除了展平锯齿状数组之外,有没有办法在 C++ dll 中使用来自 C# 的锯齿状数组?
Short of flattening the jagged array is there a way to use jagged arrays from C# in a C++ dll?
推荐答案
使用低级 Marshal 类方法,可以将任何类型编组到非托管内存.例如,对于 jaggedArray 中的每个 double[] 数组,使用 Marshal.AllocHGlobal 分配非托管内存块,并使用 Marshal.Copy Method (Double[], Int32, IntPtr, Int32) 方法将数组成员复制到其中.AllocHGlobal 返回 IntPtr 类型,可以作为指针传递给 C++ 方法,本例中为 double*.
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.
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