C# 操作 .ini 文件

C# 操作 .ini 文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;

namespace fileSocketClient
{
    /// <summary>
    /// INI文件操作类
    /// </summary>
    public static class iniFileTools
    {
        #region  API声明

        /// <summary>
        /// 为INI文件中指定的节点取得字符串
        /// </summary>
        /// <param name="lpAppName">节点名称</param>
        /// <param name="lpKeyName">键名</param>
        /// <param name="lpDefault">指定的项没有找到时返回的默认值</param>
        /// <param name="lpReturnedString">指定一个字串缓冲区，长度至少为nSize</param>
        /// <param name="nSize">指定装载到lpReturnedString缓冲区的最大字符数量</param>
        /// <param name="lpFileName">INI文件完整路径</param>
        /// <returns>复制到lpReturnedString缓冲区的字节数量，其中不包括那些NULL中止字符</returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);

        /// <summary>
        /// 修改INI文件中内容
        /// </summary>
        /// <param name="lpApplicationName">节点名称</param>
        /// <param name="lpKeyName">键名</param>
        /// <param name="lpString">要写入的字符串</param>
        /// <param name="lpFileName">INI文件完整路径</param>
        /// <returns>非零表示成功，零表示失败</returns>
        [DllImport("kernel32")]
        private static extern int WritePrivateProfileString(string lpApplicationName, string lpKeyName, string lpString, string lpFileName);

        #endregion


        /// <summary>
        /// 读取INI文件值
        /// </summary>
        /// <param name="section">节点名</param>
        /// <param name="key">键名</param>
        /// <param name="def">未取到值时返回的默认值</param>
        /// <param name="filePath">INI文件完整路径</param>
        /// <returns>读取的值</returns>
        public static string Read(string section, string key, string def, string filePath)
        {
            StringBuilder sb = new StringBuilder(1024);
            GetPrivateProfileString(section, key, def, sb, 1024, filePath);
            return sb.ToString();
        }

        /// <summary>
        /// 写INI文件值
        /// </summary>
        /// <param name="section">节点名称</param>
        /// <param name="key">键名</param>
        /// <param name="value">要写入的字符串</param>
        /// <param name="filePath">INI文件完整路径</param>
        /// <returns>非零表示成功，零表示失败</returns>
        public static int Write(string section, string key, string value, string filePath)
        {
            CheckPath(filePath);
            return WritePrivateProfileString(section, key, value, filePath);
        }

        /// <summary>
        /// 删除节
        /// </summary>
        /// <param name="section">节点名</param>
        /// <param name="filePath">INI文件完整路径</param>
        /// <returns>非零表示成功，零表示失败</returns>
        public static int DeleteSection(string section, string filePath)
        {
            return Write(section, null, null, filePath);
        }

        /// <summary>
        /// 删除键的值
        /// </summary>
        /// <param name="section">节点名</param>
        /// <param name="key">键名</param>
        /// <param name="filePath">INI文件完整路径</param>
        /// <returns>非零表示成功，零表示失败</returns>
        public static int DeleteKey(string section, string key, string filePath)
        {
            return Write(section, key, null, filePath);
        }

        /// <summary>
        /// 检查文件是否存在
        /// </summary>
        /// <param name="filePath">文件完整路径</param>
        /// <returns></returns>
        private static void CheckPath(string filePath)
        {
            if (string.IsNullOrWhiteSpace(filePath) || !File.Exists(filePath))
            {
                throw new ArgumentNullException("filePath");
            }
        }
    }
}