将字符串从 C# 发送到 C++
我有一个 C++ 程序，它对 char search[500] 数组进行一些处理。这里需要回避的是 search[] 必须从 C# 程序中赋值。
考虑一下，我有一个 C# 程序，它从 textbox 获取用户的输入，并且必须将此 string 发送到 C#。
我已经能够将数据、函数和变量从 C++ 导出到 C#，但我不熟悉相反的过程是如何完成的。
[DllImport("Test.dll", EntryPoint = "fnmain", CallingConvention = CallingConvention.Cdecl , CharSet = CharSet.Ansi)]
private static extern int fnmain();//pass what in parameter?
C++
//search[] parameter has to be here. What type to be assigned to get from C# and further get search[] char array
int main(char search[])
{
..
}
I have a C++ program which does some processing on a char search[500] array. The dodge here is that the search[] has to be assigned value from C# program.
Consider, that I have this C# program which gets user's input from textbox and have to send this string to C#.
I have been able to export the data, functions and variables from C++ to C#, but I am not familiar how the reverse is done.
[DllImport("Test.dll", EntryPoint = "fnmain", CallingConvention = CallingConvention.Cdecl , CharSet = CharSet.Ansi)]
private static extern int fnmain();//pass what in parameter?
C++
//search[] parameter has to be here. What type to be assigned to get from C# and further get search[] char array
int main(char search[])
{
..
}
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评论（2）
我认为您希望搜索成为一个
字符串。我相信 CharSet.Ansi 是确保互操作将字符串转换为 char * 所需的全部。I think you want search to be a
string. I believe CharSet.Ansi is all you need to make sure the interop converts strings to char *.这听起来可能很愚蠢。您是否考虑过使用命令行参数调用 C++ 程序？如果初始化需要大量时间，您可以使用管道的概念或从文件读取/写入文件。如果您可以进行一些套接字编程，那将意味着真正的异步数据传递。希望这有帮助。
This may sound silly. Have you considered calling C++ program with command line arguments? If initialization takes a lot of time, you can use concepts of pipes or read/write from or to files. If you can do a little bit of socket programming, that would mean true asynchronous passing of data. Hope this helped.