C ＃ create and read dat file cases

*.DAT We can also understand the meaning of the suffix, that is ：data file , Data files ; Some of this file can be opened with Notepad tool , But not necessarily after encryption .
Many programs are created dat File to save the settings . Create one that only you can parse dat file , And can read and write , Write a class , It can create a class that can only be resolved by using dat file . Simultaneously read or write data into dat When you file , You can only use this class to read and write . Simply put, this class is to open read write this dat Key to document ！ In fact, the file suffixes used to save settings can be various .
1、 Create file read / write classes , As shown below
///
/// encryption 、 Decrypt
///
public class EncrytUtilSeal {
private static byte[] key = new byte[] { 78, 56, 61, 94, 12, 88, 56, 63, 66, 111, 102, 77, 1, 186, 97, 45 };
private static byte[] iv = new byte[] { 36, 34, 42, 122, 242, 87, 2, 90, 59, 117, 123, 63, 72, 171, 130, 61 };
private static IFormatter S_Formatter = null;
static EncrytUtilSeal() {
S_Formatter = new BinaryFormatter();// Create a serialized object
}
///
/// use Rijndael128 Bit encrypted binary serializable object to file
///
/// Binary object
/// File path
///
public static bool EncryptObject(object para, string filePath)
{
// establish .bat file If there had been .bat The file overwrites , Nothing creates
using (Stream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None))
{
RijndaelManaged RMCrypto = new RijndaelManaged();
CryptoStream csEncrypt = new CryptoStream(fs, RMCrypto.CreateEncryptor(key, iv), CryptoStreamMode.Write);
S_Formatter.Serialize(csEncrypt, para);// Serialize the data and send it to csEncrypt
csEncrypt.Close();
fs.Close();
return true;
}
}
///
/// From the adoption of Rijndael128 Bit encrypted files read binary objects
///
/// File path
/// Binary object
public static object DecryptObject(string filePath)
{
// open .bat file
using (Stream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
object para;
RijndaelManaged RMCrypto = new RijndaelManaged();
CryptoStream csEncrypt = new CryptoStream(fs, RMCrypto.CreateDecryptor(key, iv), CryptoStreamMode.Read);
para = S_Formatter.Deserialize(csEncrypt); // take csEncrypt Deserialize back to the original data format ;
csEncrypt.Close();
fs.Close();
return para;
}
}
}
2、 Design read and write buttons in the interface ：

The implementation of click events is as follows

3、 The running results are as follows


5、 The reading result is as follows

6、 Because it is an encrypted file , So it's garbled when opening , As shown below ：