C#调用C++DLL int PrintString(const char* const str)

[guitar100]

int PrintString(const char* const str)
Msprintdyn.dll
C#中怎么去声明？
const char* const str

我试过还几个类型调用 不报错但是对方只接受了第一个字节
[DllImport("Msprintdyn.dll", EntryPoint = "PrintString", CharSet = CharSet.Auto)]
public static extern unsafe int PrintString(StringBuilder str);

[DllImport("Msprintdyn.dll", EntryPoint = "PrintString", CharSet = CharSet.Auto)]
public static extern int PrintString(StringBuilder str);

[DllImport("Msprintdyn.dll", EntryPoint = "PrintString", CharSet = CharSet.Auto)]
public static extern int PrintString(String str);

[DllImport("Msprintdyn.dll", EntryPoint = "PrintString", CharSet = CharSet.Auto)]
public static extern unsafe int PrintString(Char[] str);

请问大家还有怎么解决呢？

[xian_wwq]

1. 修改CharSet = CharSet.Auto， 只传了首字符，个人怀疑是因为unicode到ansi转换的问题； CallingConvention = CallingConvention.StdCall 这个参数也加上 2. 传进去的数据不需要返回，用string足够,不需要stringbuilder

[guitar100]

up up up

[langyue555]

[DllImport("Msprintdyn.dll", EntryPoint = "PrintString", ExactSpelling = false, CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Ansi)] public static extern int PrintString(ref StringBuilder str); 试试

[Poopaye]

直接用string就行