C# ini文件基本操作封装

封装类

internal class IniFileHelper
{
    #region 引用DLL

    /// <summary>
    /// 读取ini配置文件
    /// </summary>
    /// <param name="sectionName">要读取的section名,如果传入null获取ini文件所有的section名</param>
    /// <param name="key">要读取的key,如果传入null获取此section名下的所有key</param>
    /// <param name="defaultValue">读取异常的情况下的缺省值</param>
    /// <param name="returnBuffer">key所对应的值，如果该key不存在则返回defaultValue</param>
    /// <param name="size">值允许的大小</param>
    /// <param name="filePath">ini文件的完整路径和文件名</param>
    /// <returns></returns>
    [System.Runtime.InteropServices.DllImport("kernel32")]
    private static extern int GetPrivateProfileString(string sectionName, string key, string defaultValue, byte[] returnBuffer, int size, string filePath);

    /// <summary>
    /// 写入ini配置文件
    /// </summary>
    /// <param name="sectionName">要写入的section名</param>
    /// <param name="key">要写入的key，如果传入为null，整个sectionName被清除</param>
    /// <param name="value">key所对应的值，如果传入为null，此key将被清除</param>
    /// <param name="filePath">ini文件的完整路径和文件名</param>
    /// <returns></returns>
    [System.Runtime.InteropServices.DllImport("kernel32")]
    private static extern long WritePrivateProfileString(string sectionName, string key, string value, string filePath);

    #endregion


    /// <summary>
    /// 根据key读取Value
    /// </summary>
    /// <param name="sectionName">section名称</param>
    /// <param name="key">key的名称</param>
    /// <param name="filePath">文件路径</param>
    public static string GetValue(string sectionName, string key, string filePath)
    {
    byte[] buffer = new byte[2048];
    int length = GetPrivateProfileString(sectionName, key, "发生错误", buffer, 999, filePath);
    string rs = System.Text.UTF8Encoding.Default.GetString(buffer, 0, length);
    return rs;
    }

    /// <summary>
    /// 获取ini文件内所有的section名称
    /// </summary>
    /// <param name="filePath">文件路径</param>
    /// <returns>返回一个包含section名称的集合</returns>
    public static List<string> GetSectionNames(string filePath)
    {
    byte[] buffer = new byte[2048];
    int length = GetPrivateProfileString(null, "", "", buffer, 999, filePath);
    String[] rs = System.Text.UTF8Encoding.Default.GetString(buffer, 0, length).Split(new string[] { "\0" }, StringSplitOptions.RemoveEmptyEntries);
    return rs.ToList();
    }

    /// <summary>
    /// 获取指定section内的所有key
    /// </summary>
    /// <param name="sectionName">section名称</param>
    /// <param name="filePath">文件路径</param>
    /// <returns>返回一个包含key名称的集合</returns>
    public static List<string> GetKeys(string sectionName, string filePath)
    {
    byte[] buffer = new byte[2048];
    int length = GetPrivateProfileString(sectionName, null, "", buffer, 999, filePath);
    String[] rs = System.Text.UTF8Encoding.Default.GetString(buffer, 0, length).Split(new string[] { "\0" }, StringSplitOptions.RemoveEmptyEntries);
    return rs.ToList();
    }

    /// <summary>
    /// 保存内容到ini文件
    /// <para>若存在相同的key，就覆盖，否则就增加</para>
    /// </summary>
    /// <param name="sectionName">section名称</param>
    /// <param name="key">key的名称</param>
    /// <param name="value">存储的值</param>
    /// <param name="filePath">文件路径</param>
    public static bool SetValue(string sectionName, string key, string value, string filePath)
    {
    try
    {
    int rs = (int)WritePrivateProfileString(sectionName, key, value, filePath);
    return rs > 0;
    }
    catch (Exception ex)
    {
    throw ex;
    }
    }

    /// <summary>
    /// 移除指定的section
    /// </summary>
    /// <param name="sectionName">section名称</param>
    /// <param name="filePath">文件路径</param>
    /// <returns></returns>
    public static bool RemoveSection(string sectionName, string filePath)
    {
    try
    {
    int rs = (int)WritePrivateProfileString(sectionName, null, "", filePath);
    return rs > 0;
    }
    catch (Exception ex)
    {
    throw ex;
    }
    }

    /// <summary>
    /// 移除指定的key
    /// </summary>
    /// <param name="sectionName">section名称</param>
    /// <param name="filePath">文件路径</param>
    /// <returns></returns>
    public static bool Removekey(string sectionName, string key, string filePath)
    {
    try
    {
    int rs = (int)WritePrivateProfileString(sectionName, key, null, filePath);
    return rs > 0;
    }
    catch (Exception ex)
    {
    throw ex;
    }
    }
}

读

IniFileHelper.GetValue("mysqld", "basedir", System.Environment.CurrentDirectory + "\\MySQL", System.Environment.CurrentDirectory + "\\MySQL\\my.ini");

写

IniFileHelper.SetValue("mysqld", "basedir", System.Environment.CurrentDirectory + "\\MySQL", System.Environment.CurrentDirectory + "\\MySQL\\my.ini");

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