c# winform程序讀寫ini配置文件

背景：本來準備使用settings.settings來保存數據庫配置等信息的。但是設置爲“應用程序”級別，就沒法方便的用 Properties.Settings.Default.Save() 更改保存。 且沒法在程序不重啓的情況下應用修改後的配置。如果設置爲“用戶”級別，就存在配置信息保存到appData文件夾下被清空緩存失效的風險。因此回過頭來選擇ini來保存這些配置信息

網上找了個ini讀寫操作類，直接copy拿來用，測試可用，代碼如下：

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


namespace data_migration_desk.utils
{
    // INI文件操作類
    class IniFileHelper
    {
        string strIniFilePath;  // ini配置文件路徑

        // 返回0表示失敗，非0爲成功
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);

        // 返回取得字符串緩衝區的長度
        [DllImport("kernel32", CharSet = CharSet.Auto)]
        private static extern long GetPrivateProfileString(string section, string key, string strDefault, StringBuilder retVal, int size, string filePath);

        [DllImport("Kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetPrivateProfileInt(string section, string key, int nDefault, string filePath);

        /// <summary>
        /// 無參構造函數
        /// </summary>
        /// <returns></returns>
        public IniFileHelper()
        {
            this.strIniFilePath = Directory.GetCurrentDirectory() + "\\Properties\\sysconfig.ini";
        }


        /// <summary>
        /// 有參構造函數
        /// </summary>
        /// <param name="strIniFilePath">ini配置文件路徑</param>
        /// <returns></returns>
        public IniFileHelper(string strIniFilePath)
        {
            if (strIniFilePath != null)
            {
                this.strIniFilePath = strIniFilePath;
            }
        }


        /// <summary>
        /// 獲取ini配置文件中的字符串
        /// </summary>
        /// <param name="section">節名</param>
        /// <param name="key">鍵名</param>
        /// <param name="strDefault">默認值</param>
        /// <param name="retVal">結果緩衝區</param>
        /// <param name="size">結果緩衝區大小</param>
        /// <returns>成功true,失敗false</returns>
        public bool GetIniString(string section, string key, string strDefault, StringBuilder retVal, int size)
        {
            long liRet = GetPrivateProfileString(section, key, strDefault, retVal, size, strIniFilePath);
            return (liRet >= 1);
        }


        /// <summary>
        /// 獲取ini配置文件中的整型值
        /// </summary>
        /// <param name="section">節名</param>
        /// <param name="key">鍵名</param>
        /// <param name="nDefault">默認值</param>
        /// <returns></returns>
        public int GetIniInt(string section, string key, int nDefault)
        {
            return GetPrivateProfileInt(section, key, nDefault, strIniFilePath);
        }


        /// <summary>
        /// 往ini配置文件寫入字符串
        /// </summary>
        /// <param name="section">節名</param>
        /// <param name="key">鍵名</param>
        /// <param name="val">要寫入的字符串</param>
        /// <returns>成功true,失敗false</returns>
        public bool WriteIniString(string section, string key, string val)
        {
            long liRet = WritePrivateProfileString(section, key, val, strIniFilePath);
            return (liRet != 0);
        }


        /// <summary>
        /// 往ini配置文件寫入整型數據
        /// </summary>
        /// <param name="section">節名</param>
        /// <param name="key">鍵名</param>
        /// <param name="val">要寫入的數據</param>
        /// <returns>成功true,失敗false</returns>
        public bool WriteIniInt(string section, string key, int val)
        {
            return WriteIniString(section, key, val.ToString());
        }
    }
}

使用方法：

讀取：

            IniFileHelper iniFileHelper = new IniFileHelper();
            StringBuilder sb = new StringBuilder(60);
            iniFileHelper.GetIniString("tokeninfo", "apiUrl", "", sb, sb.Capacity);
            string aaa = sb.ToString();

寫入：

            IniFileHelper iniFileHelper = new IniFileHelper();
            iniFileHelper.WriteIniString("tokeninfo", "apiUrl", "newString");

 

其中，ini配置文件有一些需要講究的地方，不然，就會出現讀取不到值的情況