1         public static string Encrypt3DES(string a_strString, string a_strKey)
 2         {
 3             
 4             TripleDESCryptoServiceProvider DES = new TripleDESCryptoServiceProvider();
 5 
 6             DES.Key = ASCIIEncoding.ASCII.GetBytes(a_strKey);
 7             DES.Mode = CipherMode.ECB;
 8             ICryptoTransform DESEncrypt = DES.CreateEncryptor();
 9 
10             byte[] Buffer = ASCIIEncoding.ASCII.GetBytes(a_strString);
11 
12             byte[] Buffer2 = DESEncrypt.TransformFinalBlock(Buffer, 0, Buffer.Length);
13             
14             StringBuilder builder = new StringBuilder(Buffer2.Length * 3);
15             foreach (byte num in Buffer2)
16             {
17                 builder.Append(Convert.ToString(num, 16).PadLeft(2,'0').PadRight(3,' '));
18             }
19 
20             return builder.ToString().ToUpper().Replace(" ","");
21         }