c# - 将字符串从 C# 传递到 C DLL

Question

我正在尝试将字符串从 C# 传递到 C DLL。根据我的阅读，.NET 应该为我完成从字符串到 char* 的转换，但是我得到“错误 CS1503:参数‘1’:无法从‘string’转换为‘char*’”有人能告诉我我在哪里有错吗？谢谢。

C#代码

[DllImport("Source.dll", ExactSpelling = true, CallingConvention = CallingConvention.Cdecl), SuppressUnmanagedCodeSecurity]
public static unsafe extern bool StreamReceiveInitialise(char* filepath);

const string test = "test";
// This method that will be called when the thread is started
public void Stream()
{
    if (StreamReceiveInitialise(test))
    {


    }
}

动态链接库

extern "C"
{
    __declspec(dllexport) bool __cdecl StreamReceiveInitialise(char* filepath);
}

Answer 1

将您的外部方法声明为:

public static extern bool StreamReceiveInitialise(string filepath);