static string encryptKey = "加密字符";
#region 加密字符串
///
/// 加密字符串
///
///
///
static string Encrypt(string str)
{
DESCryptoServiceProvider descsp = new DESCryptoServiceProvider(); //实例化加/解密类对象
byte[] key = Encoding.Unicode.GetBytes(encryptKey);//定义字节数组，用来存储密钥
byte[] data = Encoding.Unicode.GetBytes(str);//定义字节数组，用来存储要加密的字符串
MemoryStream MStream = new MemoryStream();//实例化内存流对象
//使用内存流实例化加密流对象
CryptoStream CStream = new CryptoStream(MStream, descsp.CreateEncryptor(key, key), CryptoStreamMode.Write);
CStream.Write(data, 0, data.Length);//向加密流中写入数据
CStream.FlushFinalBlock();//释放加密流
return Convert.ToBase64String(MStream.ToArray());//返回加密后的字符串
}
#endregion
#region 解密字符串
static string Decrypt(string str)
{
DESCryptoServiceProvider descsp = new DESCryptoServiceProvider(); //实例化加/解密类对象
byte[] key = Encoding.Unicode.GetBytes(encryptKey); //定义字节数组，用来存储密钥
byte[] data = Convert.FromBase64String(str);//定义字节数组，用来存储要解密的字符串
MemoryStream MStream = new MemoryStream();//实例化内存流对象
//使用内存流实例化解密流对象
CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(key, key), CryptoStreamMode.Write);
CStream.Write(data, 0, data.Length);//向解密流中写入数据
CStream.FlushFinalBlock();//释放解密流
return Encoding.Unicode.GetString(MStream.ToArray());//返回解密后的字符串
}
#endregion