C#中如何调用GetPrivateProfileSection （API）

Question

DWORD GetPrivateProfileSection(
  LPCTSTR lpAppName,
  LPTSTR lpReturnedString,
  DWORD nSize,
  LPCTSTR lpFileName
);lpReturnedString 
[out] Pointer to a buffer that receives the key name and value pairs associated with the named section. The buffer is filled with one or more null-terminated strings; the last string is followed by a second null character. lpReturnedString 应该如何映射为C#类型
如果映射为StringBuilder，只能取得第一对key value

Answer 1

[DllImport("KERNEL32.DLL",
          EntryPoint = "GetPrivateProfileSection")]
        protected internal static extern int
     GetPrivateProfileSection(string lpAppName,
        byte[] lpReturnedString, int nSize,
        string lpFileName);
public static StringCollection GetINISection(
           String filename, String section)
        {
            StringCollection items = new StringCollection();
            byte[] buffer = new byte[32768];
            int bufLen = 0;
            bufLen = GetPrivateProfileSection(section, buffer,
               buffer.GetUpperBound(0), filename);
            if (bufLen > 0)
            {
                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < bufLen; i++)
                {
                    if (buffer[i] != 0)
                    {
                        sb.Append((char)buffer[i]);
                    }
                    else
                    {
                        if (sb.Length > 0)
                        {
                            items.Add(sb.ToString());
                            sb = new StringBuilder();
                        }
                    }
                }
            }
            return items;
        }  
*****************************************************************************
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Answer 2

楼上写得好，使用byte[]就可以了

Answer 3

还有与此相反的，我要向API函数传入这样的参数应该怎样处理呢

Answer 4

谢谢各位，这是我的最终实现，与大家分享，同时也寻求更好，更简单的答案
目前使用了unsafe的方法，目的在于在sbyte与char之间转换，不知道有没有更好的方法    public class IniFile
    {
        private const uint StringBufferSize = 32768;        public IniFile(string filePath)
        {
            FilePath = filePath;
            Enc = Encoding.Default;
        }        public IniFile(string filePath, Encoding enc)
        {
            FilePath = filePath;
            Enc = enc;
        }        [DllImport("kernel32.dll", 
            EntryPoint = "GetPrivateProfileSectionNames")]
        private static extern uint GetPrivateProfileSectionNames(
            sbyte[] lpszReturnBuffer, uint nSize, string lpFileName);        public List<string> GetSectionNames()
        {
            sbyte[] lpszReturnBuffer = new sbyte[StringBufferSize];
            uint len = GetPrivateProfileSectionNames(lpszReturnBuffer,
                (uint)lpszReturnBuffer.Length, FilePath);            List<string> sections = new List<string>();
            unsafe
            {
                fixed (sbyte* pBuf = lpszReturnBuffer)
                {
                    uint i = 0;
                    while (i < len)
                    {
                        uint start = i;
                        uint length = 0;                        while (i < len && lpszReturnBuffer[i] != 0)
                        {
                            ++i;
                        }                        length = i - start;
                        sections.Add(new string(pBuf, 
                            (int)start, (int)length, Enc));                        ++i;
                        if (i < len && lpszReturnBuffer[i] == 0)
                        {
                            break;
                        }
                    }
                }
            }            return sections;
        }        [DllImport("kernel32.dll", EntryPoint = "GetPrivateProfileSection")]
        private static extern uint GetPrivateProfileSection(string lpAppName,
            sbyte[] lpReturnedString, uint nSize, string lpFileName);        public List<string> GetSection(string section)
        {
            sbyte[] lpReturnedString = new sbyte[StringBufferSize];
            uint len = GetPrivateProfileSection(section,
               lpReturnedString, (uint)lpReturnedString.Length, FilePath);            List<string> items = new List<string>();
            unsafe
            {
                fixed (sbyte* pBuf = lpReturnedString)
                {
                    uint i = 0;
                    while (i < len)
                    {
                        uint start = i;
                        uint length = 0;                        while (i < len && lpReturnedString[i] != 0)
                        {
                            ++i;
                        }                        length = i - start;
                        items.Add(new string(pBuf, 
                            (int)start, (int)length, Enc));                        ++i;
                        if (i < len && lpReturnedString[i] == 0)
                        {
                            break;
                        }
                    }
                }
            }            return items;
        }        [DllImport("kernel32", EntryPoint = "GetPrivateProfileString")]
        private static extern uint GetPrivateProfileString(
            string lpAppName, string lpKeyName, string lpDefault,
            StringBuilder lpReturnedString, uint nSize, string lpFileName);        public string GetString(string section, string key, string def)
        {            StringBuilder value = new StringBuilder((int)StringBufferSize);
            GetPrivateProfileString(section, key, 
                def, value, StringBufferSize, FilePath);
            return value.ToString();
        }        [DllImport("kernel32")]
        private static extern bool WritePrivateProfileSection(
              string lpAppName,
              string lpString,
              string lpFileName
            );        public bool WriteSection(string section, List<string> lstKeyValue)
        {
            string lpString = "";
            for (int i = 0; i < lstKeyValue.Count; ++i)
            {
                lpString += lstKeyValue[i];
                lpString += "\0";
            }            lpString += "\0";            return WritePrivateProfileSection(section, lpString, FilePath);
        }        [DllImport("kernel32", EntryPoint = "WritePrivateProfileString")]
        private static extern bool WritePrivateProfileString(string lpAppName,
            string lpKeyName, string lpString, string lpFileName);        public bool WriteString(string section, string key, string value)
        {
            return WritePrivateProfileString(section, key, value, FilePath);
        }        private string FilePath;
        private Encoding Enc;
    }