将 C# 字符串数组传递给 C++

Question

I have a string array in C# for example:

string[] level = {"results","isPA"}

Now I need to pass this array to a C++ Function.

The wrapper looks like this:

[DllImport("File.dll", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)

public static extern long SetJsonString(string[] Level, string Entry, string Item);

The C++ function then gets called using:

long SetJsonString(char** Level, char* Entry, char* Item)

If I know want to access the single elements of the array I only get the first one. Does anybody have some ideas how to handle the passing?

Answer 1

Using SafeArray just like Thinh Tran suggested did the trick.

The code can be found here: codeproject in the "Passing an Array of Strings" paragraph.