将C#锯齿状数组编组为C ++ [英] Marshalling C# Jagged Array to C++

问题描述

我正试图将2D C#锯齿状数组(double[][] jaggedArray)编组到C ++ dll中，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，我收到的消息是:

However, i'm getting the message:

没有针对以下内容的封送处理支持 嵌套数组.

There is no marshaling support for nested arrays.

平坦化锯齿状数组的快捷方式是否可以在C ++ dll中使用C#中的锯齿状数组?

Short of flattening the jagged array is there a way to use jagged arrays from C# in a C++ dll?

推荐答案

使用低级的Marshal类方法，可以将任何类型的数据封送到非托管内存.例如，对于jaggedArray中的每个double []数组，请使用Marshal.AllocHGlobal分配非托管内存块，并使用Marshal.Copy方法(Double []，Int32，IntPtr，Int32)方法向其复制数组成员. AllocHGlobal返回IntPtr类型，在这种情况下，它可以作为Poiner(double *)传递给C ++方法.

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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