动态连接库调用

[wx114]

Delphi里动态连接库调用声明：(Delphi是正确)
function Coding(input:string):pchar;
stdcall;far;external 'convertdll.dll'name 'Coding';
function Decode(input:string):pchar;
stdcall;far;external 'convertdll.dll'name 'Decode';;

我翻译成C#(不知道翻译的正不正确？，大伙帮忙看看，谢谢)
[DllImport("convertdll.dll", EntryPoint = "Coding", CallingConvention = CallingConvention.StdCall)]
public static extern string Coding(string input);

[DllImport("convertdll.dll", EntryPoint = "Decode", CallingConvention = CallingConvention.StdCall)]

public static extern String Decode(String input);

[wx114]

有没有谁调用DLL里函数返回值类型是指针的？

[wx114]

我改成下面的形式后：
[DllImport("ConvertDll.dll", EntryPoint = "Decode",
CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
public static extern string Decode([MarshalAs(UnmanagedType.AnsiBStr)]string input);
单步执行是正确，直接运行出现外部组件发生异常。不知道为什么？

[yi10000]

[DllImport("convertdll.dll")]
static extern pchar coding(string input)

[wx114]

但是C#里没有pchar类型

[股神]

up

[chenjunhui]

顶是硬道理