C# 操作.ini文件

1.声明变量

 #region "声明变量"

        /// <summary>
        /// 写入INI文件
        /// </summary>
        /// <param name="section">节点名称[如[TypeName]]</param>
        /// <param name="key">键</param>
        /// <param name="val">值</param>
        /// <param name="filepath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern long WritePrivateProfileString(string section, string key, string val, string filepath);
        /// <summary>
        /// 读取INI文件
        /// </summary>
        /// <param name="section">节点名称</param>
        /// <param name="key">键</param>
        /// <param name="def">值</param>
        /// <param name="retval">stringbulider对象</param>
        /// <param name="size">字节大小</param>
        /// <param name="filePath">文件路径</param>
        /// <returns></returns>
        [DllImport("kernel32")]
        private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retval, int size, string filePath);

        private string strFilePath = Application.StartupPath + "\FileConfig.ini";//获取INI文件路径
        private string strSec = ""; //INI文件名

        #endregion

2.写入到ini文件

 private void WriteIni()
        {
            try
            {
                //根据INI文件名设置要写入INI文件的节点名称
                //此处的节点名称完全可以根据实际需要进行配置
                strSec = Path.GetFileNameWithoutExtension(strFilePath);
                WritePrivateProfileString(strSec, "UserName", EDncrypt.MD5Encrypt(txtUser.Text.Trim()), strFilePath);
                WritePrivateProfileString(strSec, "Password", EDncrypt.MD5Encrypt(txtPass.Text.Trim()), strFilePath);
                WritePrivateProfileString(strSec, "DataBase", EDncrypt.MD5Encrypt(txtDataBase.Text.Trim()), strFilePath);
                WritePrivateProfileString(strSec, "Host", EDncrypt.MD5Encrypt(txtServer.Text.Trim()), strFilePath);
                MessageBox.Show("写入成功");

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
        }

3.读取ini文件

 private void ReadIni()
        {
            if (File.Exists(strFilePath))//读取时先要判读INI文件是否存在
            {
                strSec = Path.GetFileNameWithoutExtension(strFilePath);
                txtUser.Text = ContentValue(strSec, "UserName");
                txtPass.Text = ContentValue(strSec, "Password");
                txtDataBase.Text = ContentValue(strSec, "DataBase");
                txtServer.Text = ContentValue(strSec, "Host");
            }
            else
            {
                MessageBox.Show("INI文件不存在");
            }
        }
        /// <summary>
        /// 自定义读取INI文件中的内容方法
        /// </summary>
        /// <param name="Section">键</param>
        /// <param name="key">值</param>
        /// <returns></returns>
        private string ContentValue(string Section, string key)
        {
            StringBuilder temp = new StringBuilder(1024);
            GetPrivateProfileString(Section, key, "", temp, 1024, strFilePath);
            return EDncrypt.MD5Decrypt(temp.ToString());
        }

4.Md5加密与解密类

 public class EDncrypt
    {
        private static readonly string m_strKey = "dre34ASD";
        ///MD5加密
        public static string MD5Encrypt(string pToEncrypt)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
            des.Key = ASCIIEncoding.ASCII.GetBytes(m_strKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(m_strKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();
            foreach (byte b in ms.ToArray())
            {
                ret.AppendFormat("{0:X2}", b);
            }
            ret.ToString();
            return ret.ToString();
        }

        ///MD5解密
        public static string MD5Decrypt(string pToDecrypt)
        {
            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
            for (int x = 0; x < pToDecrypt.Length / 2; x++)
            {
                int i = (System.Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
                inputByteArray[x] = (byte)i;
            }

            des.Key = ASCIIEncoding.ASCII.GetBytes(m_strKey);
            des.IV = ASCIIEncoding.ASCII.GetBytes(m_strKey);
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            StringBuilder ret = new StringBuilder();
            return System.Text.Encoding.Default.GetString(ms.ToArray());
        }
    }