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C#對INI文件進行讀寫操作的示例代碼

更新時間：2024年02月01日 17:15:06 作者：lingxiao16888

這篇文章主要為大家詳細(xì)介紹了C#對INI文件進行讀寫操作的相關(guān)知識,文中的示例代碼講解詳細(xì),具有一定的學(xué)習(xí)價值,有需要的小伙伴可以參考一下

1.通過調(diào)用API函數(shù)完成對INI文件的讀取，修改，寫入操作

 string filePath;
        private void btnModify_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(filePath) || !File.Exists(filePath))
            {
                using (SaveFileDialog sfd=new SaveFileDialog())
                {                    
                    sfd.Filter= "初始化文件(*.INI)|*.INI";
                    if (sfd.ShowDialog() == DialogResult.OK)
                    {
                        FileStream fs = System.IO.File.Create(sfd.FileName);
                        fs.Dispose();
                        filePath = sfd.FileName;
                    }
                }
            }
            INIHelper.WriteToINI(filePath, "ConnectString", "Data Source", txtServer.Text);
            INIHelper.WriteToINI(filePath, "ConnectString", "DataBase", txtDataBase.Text);
            INIHelper.WriteToINI(filePath, "ConnectString", "Uid", txtSid.Text);
            INIHelper.WriteToINI(filePath, "ConnectString", "Pwd", txtPwd.Text);
            MessageBox.Show("保存成功！");
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
 
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            using(OpenFileDialog ofd=new OpenFileDialog())
            {
                ofd.Filter = "初始化文件(*.INI)|*.INI";
                ofd.Multiselect = false;
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                     filePath = ofd.FileName;
                    string source = INIHelper.ReadFromINI(filePath, "ConnectString", "Data Source");
                    string dataName= INIHelper.ReadFromINI(filePath, "ConnectString", "DataBase");
                    string uid= INIHelper.ReadFromINI(filePath, "ConnectString", "Uid", "未設(shè)置");
                    string pwd= INIHelper.ReadFromINI(filePath, "ConnectString", "Pwd","未設(shè)置");
                    txtServer.Text = source;
                    txtDataBase.Text = dataName;
                    txtSid.Text = uid;
                    txtPwd.Text = pwd;
                }
            }
        }
    }
    /// <summary>
    /// 對INI文件進行讀寫
    /// </summary>
    class INIHelper
    {
        /// <summary>
        /// 從INI文件中讀取數(shù)據(jù)
        /// </summary>
        /// <param name="filePath">INI文件的全路徑</param>
        /// <param name="rootValue">根節(jié)點值，例如根節(jié)點[ConnectString]的值為：ConnectString</param>
        /// <param name="key">根節(jié)點下的鍵</param>
        /// <param name="defValue">當(dāng)標(biāo)記值未設(shè)定或不存在時的默認(rèn)值</param>
        /// <returns></returns>
        public static string ReadFromINI(string filePath, string rootValue,string key,string defValue="")
        {
            StringBuilder sb = new StringBuilder(1024);
            GetPrivateProfileString(rootValue, key, defValue, sb, 1024, filePath);
            return sb.ToString();
        }
        public static void WriteToINI(string filePath, string rootValue, string key, string newVal)
        {
           
            WritePrivateProfileString(rootValue, key, newVal, filePath);
           
        }
        
        /// <summary>
        /// 對INI文件進行讀取操作
        /// </summary>
        /// <param name="IpAppName">表示INI文件內(nèi)部根節(jié)點的值</param>
        /// <param name="IpKeyName">表示根節(jié)點下子標(biāo)記的值</param>
        /// <param name="IpDefault">表示當(dāng)標(biāo)記值未設(shè)定或不存在時的默認(rèn)值</param>
        /// <param name="IpReturnString">返回讀取節(jié)點的值</param>
        /// <param name="nSize">讀取的節(jié)點內(nèi)容的最大容量</param>
        /// <param name="IpFileName">文件的全路徑</param>
        /// <returns></returns>
        [System.Runtime.InteropServices.DllImport("kernel32")]
        static extern int GetPrivateProfileString(string IpAppName, string IpKeyName, string IpDefault, StringBuilder IpReturnString, int nSize, string IpFileName);
        /// <summary>
        /// 對INI文件進行寫入操作
        /// </summary>
        /// <param name="mpAppName">INI文件內(nèi)部根節(jié)點的值</param>
        /// <param name="mpKeyName">將要修改的標(biāo)記名稱</param>
        /// <param name="mpDefault">想要修改的內(nèi)容</param>
        /// <param name="mpFileName">INI文件的全路徑</param>
        /// <returns></returns>
        [System.Runtime.InteropServices.DllImport("kernel32")]
        static extern long WritePrivateProfileString(string mpAppName, string mpKeyName, string mpDefault, string mpFileName);
    }

2,INI文件的擴展名為.ini 例如：System.ini 。

3,INI文件格式如下（使用記事本打開）: