using?System;
using?System.Collections.Generic;
using?System.Text;
using?System.Runtime.InteropServices;
using?System.Security.Cryptography;
using?System.IO;

??public???class?CommFunc
????{
???????
????????#region?“Des加密和解密“
????????//默認密鑰向量
????????private?static?byte[]?Keys?=?{?0x12?0x34?0x56?0x78?0x90?0xAB?0xCD?0xEF?};
????????///?

????????///?DES加密字符串
????????///?

????????///?待加密的字符串
????????///?加密密鑰要求為8位
????????///?加密成功返回加密后的字符串，失敗返回源串
????????public?static??string?EncryptDES（string?encryptString?string?encryptKey）
????????{
????????????try
????????????{
????????????????byte[]?rgbKey?=?Encoding.UTF8.GetBytes（encryptKey.Substring（0?8））;
????????????????byte[]?rgbIV?=?Keys;
????????????????byte[]?inputByteArray?=?Encoding.UTF8.GetBytes（encryptString）;
????????????????DESCryptoServiceProvider?dCSP?=?new?DESCryptoServiceProvider（）;
????????????????MemoryStream?mStream?=?new?MemoryStream（）;
????????????????CryptoStream?cStream?=?new?CryptoStream（mStream?dCSP.CreateEncryptor（rgbKey?rgbIV）?CryptoStreamMode.Write）;
????????????????cStream.Write（inputByteArray?0?inputByteArray.Length）;
????????????????cStream.FlushFinalBlock（）;
????????????????return?Convert.Tobase64String（mStream.ToArray（））;
????????????}
????????????catch
????????????{
????????????????return?encryptString;
????????????}
????????}

????????///?

????????///?DES解密字符串
????????///?

????????///?待解密的字符串
????????///?解密密鑰要求為8位和加密密鑰相同
????????///?解密成功返回解密后的字符串，失敗返源串
????????public?static??string?DecryptDES（string?decryptString?string?decryptKey）
????????{
????????????try
????????????{
????????????????byte[]?rgbKey?=?Encoding.UTF8.GetBytes（decryptKey）;
????????????????byte[]?rgbIV?=?Keys;
????????????????byte[]?inputByteArray?=?Convert.Frombase64String（decryptString）;
????????????????DESCryptoServiceProvider?DCSP?=?new?DESCryptoServiceProvider（）;
????????????????MemoryStream?mStream?=?new?MemoryStream（）;
????????????????CryptoStream?cStream?=?new?CryptoStream（mStream?DCSP.CreateDecryptor（rgbKey?rgbIV）?CryptoStreamMode.Write）;
????????????????cStream.Write（inputByteArray?0?inputByteArray.Length）;
????????????????cStream.FlushFinalBlock（）;
????????????????return?Encoding.UTF8.GetString（mStream.ToArray（））;
????????????}
????????????catch
????????????{
????????????????return?decryptString;
????????????}
????????}
????????#endregion

????????#region?“ini?文件的讀寫“
????????///?

????????///?通過調用kernel32.dll中的兩個api：WritePrivateProfileString，GetPrivateProfileString來實現對ini?文件的讀寫
????????///?

????????///?
????????///?
????????///?
????????///?
????????///?