ini配置文件 读写类

/// <summary>
/// 读写INI文件的类。
/// </summary>
public class INIHelper
{
    // 读写INI文件相关。
    [DllImport("kernel32.dll", EntryPoint = "WritePrivateProfileString", CharSet = CharSet.Ansi)]
    public static extern long WritePrivateProfileString(string section, string key, string val, string filePath);
    [DllImport("kernel32.dll", EntryPoint = "GetPrivateProfileString", CharSet = CharSet.Ansi)]
    public static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
    [DllImport("kernel32.dll", EntryPoint = "GetPrivateProfileSectionNames", CharSet = CharSet.Ansi)]
    public static extern int GetPrivateProfileSectionNames(IntPtr lpszReturnBuffer, int nSize, string filePath);
    [DllImport("KERNEL32.DLL ", EntryPoint = "GetPrivateProfileSection", CharSet = CharSet.Ansi)]
    public static extern int GetPrivateProfileSection(string lpAppName, byte[] lpReturnedString, int nSize, string filePath);

    /// <summary>
    /// 向INI写入数据。
    /// </summary>
    /// <PARAM name="Section">节点名。</PARAM>
    /// <PARAM name="Key">键名。</PARAM>
    /// <PARAM name="Value">值名。</PARAM>
    public void Write(string Section, string Key, string Value, string path)
    {
        WritePrivateProfileString(Section, Key, Value, path);
    }

    /// <summary>
    /// 读取INI数据。
    /// </summary>
    /// <PARAM name="Section">节点名。</PARAM>
    /// <PARAM name="Key">键名。</PARAM>
    /// <PARAM name="Path">值名。</PARAM>
    /// <returns>相应的值。</returns>
    public string Read(string Section, string Key, string path)
    {
        StringBuilder temp = new StringBuilder(255);
        int i = GetPrivateProfileString(Section, Key, "", temp, 255, path);
        return temp.ToString();
    }
    /// <summary>
    /// 读取一个ini里面所有的节
    /// </summary>
    /// <param name="sections"></param>
    /// <param name="path"></param>
    /// <returns></returns>
    public int GetAllSectionNames(out string[] sections, string path)
    {
        int MAX_BUFFER = 32767;
        IntPtr pReturnedString = Marshal.AllocCoTaskMem(MAX_BUFFER);
        int bytesReturned = GetPrivateProfileSectionNames(pReturnedString, MAX_BUFFER, path);
        if (bytesReturned == 0)
        {
            sections = null;
            return -1;
        }
        string local = Marshal.PtrToStringAnsi(pReturnedString, (int)bytesReturned).ToString();
        Marshal.FreeCoTaskMem(pReturnedString);
        //use of Substring below removes terminating null for split
        sections = local.Substring(0, local.Length - 1).Split('\0');
        return 0;
    }
    /// <summary>
    /// 得到某个节点下面所有的key和value组合
    /// </summary>
    /// <param name="section"></param>
    /// <param name="keys"></param>
    /// <param name="values"></param>
    /// <param name="path"></param>
    /// <returns></returns>
    public int GetAllKeyValues(string section, out string[] keys, out string[] values, string path)
    {
        byte[] b = new byte[65535];
        GetPrivateProfileSection(section, b, b.Length, path);
        string s = System.Text.Encoding.Default.GetString(b);
        string[] tmp = s.Split((char)0);
        ArrayList result = new ArrayList();
        foreach (string r in tmp)
        {
            if (r != string.Empty)
                result.Add(r);
        }
        keys = new string[result.Count];
        values = new string[result.Count];
        for (int i = 0; i < result.Count; i++)
        {
            string[] item = result[i].ToString().Split(new char[] { '=' });
            if (item.Length == 2)
            {
                keys[i] = item[0].Trim();
                values[i] = item[1].Trim();
            }
            else if (item.Length == 1)
            {
                keys[i] = item[0].Trim();
                values[i] = "";
            }
            else if (item.Length == 0)
            {
                keys[i] = "";
                values[i] = "";
            }
        }
        return 0;
    }
}