Print more pages in vb.net 2005

Question

I know this subject has been written about before but I still cant get a solution to my problem.  It is the proverbial problem of printing a second, third and more pages.  And I know the answer has to do with e.hasmorepages but I cant see where to put it in my code.  Can u help please.

I have a file which is similar to a csv file with 40 fields.  Each of the fields needs to be printed in columns and rows and when I print it looks like a spreadsheet.  WHen the page is full i need to throw a new page and continue until I reach the file end.  The analysis of the the file is quite complex.  One of the fields out of the 40 can contain in its own right 40 fields which also can produce rows on my spreadsheet. 

The known factor and crucial issued is when I reach an Ypos (vertical) position of about 1000 on the page i want to start a new page.  This is what i have done so far but either get indefinate pages which never starts to print or one page which continues to overlap the text for page 2, 3, 4 etc.

I have attached my code and a printout of what i achieve when printing :) 

I'd appreciate someones solution

Richard 

 

 

 

 

 

 

Answer 1

Encryption

• Sometimes we want to encrypt the values that time we use MD5 Encryption and Decryption
• Here i give the code for Encryption and Decryption.

passPhrase ,saltValue ,initVector this variables are the key for Encryption and Decryption

public static string passPhrase = "YOUR KEY1";

public static string saltValue = "YOUR KE2";

public static string initVector = "YOUR KE3";

public static string FunForEncrypt(string objText)

{

int keySize = 256;

int passwordIterations = 03;

string hashAlgorithm = "MD5";

byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);

byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);

byte[] plainTextBytes = Encoding.UTF8.GetBytes(objText);

PasswordDeriveBytes password = new PasswordDeriveBytes

(

passPhrase,

saltValueBytes,

hashAlgorithm,

passwordIterations

);

byte[] keyBytes = password.GetBytes(keySize / 8);

RijndaelManaged symmetricKey = new RijndaelManaged();

symmetricKey.Mode = CipherMode.CBC;

ICryptoTransform encryptor = symmetricKey.CreateEncryptor

(

keyBytes,

initVectorBytes

);

MemoryStream memoryStream = new MemoryStream();

CryptoStream cryptoStream = new CryptoStream

(

memoryStream,

encryptor,

CryptoStreamMode.Write

);

cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);

cryptoStream.FlushFinalBlock();

byte[] cipherTextBytes = memoryStream.ToArray();

memoryStream.Close();

cryptoStream.Close();

string cipherText = Convert.ToBase64String(cipherTextBytes);

cipherText = HttpUtility.UrlEncode(cipherText);

return cipherText;

}

Decryption :

• this below code used to Decrypt the text

public static string FunForDecrypt(string cipherText)

{

string plainText = "";

int keySize = 256;

int passwordIterations = 03;

string hashAlgorithm = "MD5";

try

{

cipherText = HttpUtility.UrlDecode(cipherText);

byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);

byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);

byte[] cipherTextBytes = Convert.FromBase64String(cipherText);

PasswordDeriveBytes password = new PasswordDeriveBytes

(

passPhrase,

saltValueBytes,

hashAlgorithm,

passwordIterations

);

byte[] keyBytes = password.GetBytes(keySize / 8);

RijndaelManaged symmetricKey = new RijndaelManaged();

symmetricKey.Mode = CipherMode.CBC;

ICryptoTransform decryptor = symmetricKey.CreateDecryptor

(

keyBytes,

initVectorBytes

);

MemoryStream memoryStream = new MemoryStream(cipherTextBytes);

CryptoStream cryptoStream = new CryptoStream

(

memoryStream,

decryptor,

CryptoStreamMode.Read

);

byte[] plainTextBytes = new byte[cipherTextBytes.Length];

int decryptedByteCount = cryptoStream.Read

(

plainTextBytes,

0,

plainTextBytes.Length

);

memoryStream.Close();

cryptoStream.Close();

plainText = Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);

}

catch (Exception ex)

{

plainText = "";

}

return plainText;

}

Answer 2

Use this code ,its working fine..

privatestringEncrypt(stringclearText)
{
stringEncryptionKey="MAKV2SPBNI99212";
byte[]clearBytes=Encoding.Unicode.GetBytes(clearText);
using(Aesencryptor=Aes.Create())
{
Rfc2898DeriveBytespdb=newRfc2898DeriveBytes(EncryptionKey,newbyte[]{0x49,0x76,0x61,0x6e,0x20,0x4d,0x65,0x64,0x76,0x65,0x64,0x65,0x76});
encryptor.Key=pdb.GetBytes(32);
encryptor.IV=pdb.GetBytes(16);
using(MemoryStreamms=newMemoryStream())
{
using(CryptoStreamcs=newCryptoStream(ms,encryptor.CreateEncryptor(),CryptoStreamMode.Write))
{
cs.Write(clearBytes,0,clearBytes.Length);
cs.Close();
}
clearText=Convert.ToBase64String(ms.ToArray());
}
}
returnclearText;
}
privatestringDecrypt(stringcipherText)
{
stringEncryptionKey="MAKV2SPBNI99212";
byte[]cipherBytes=Convert.FromBase64String(cipherText);
using(Aesencryptor=Aes.Create())
{
Rfc2898DeriveBytespdb=newRfc2898DeriveBytes(EncryptionKey,newbyte[]{0x49,0x76,0x61,0x6e,0x20,0x4d,0x65,0x64,0x76,0x65,0x64,0x65,0x76});
encryptor.Key=pdb.GetBytes(32);
encryptor.IV=pdb.GetBytes(16);
using(MemoryStreamms=newMemoryStream())
{
using(CryptoStreamcs=newCryptoStream(ms,encryptor.CreateDecryptor(),CryptoStreamMode.Write))
{
cs.Write(cipherBytes,0,cipherBytes.Length);
cs.Close();
}
cipherText=Encoding.Unicode.GetString(ms.ToArray());
}
}
returncipherText;
}

Answer 3

Yes . You can . 

 The best way is using your secret key you can do encryption and decryption.Copy and Paste below code into you application try to run it.

 

// This constant string is used as a "salt" value for the PasswordDeriveBytes function calls.
// This size of the IV (in bytes) must = (keysize / 8). Default keysize is 256, so the IV must be
// 32 bytes long. Using a 16 character string here gives us 32 bytes when converted to a byte array.
private static readonly byte[] initVectorBytes = Encoding.ASCII.GetBytes("tu89geji340t89u2");
// This constant is used to determine the keysize of the encryption algorithm.
private const int keysize = 256;
//Here passPhrase is your secret key. Which can be anything. but should be similar in both ecryption and decryption
public static string Encrypt(string plainText, string passPhrase)
{
try
{
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
using (PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (RijndaelManaged symmetricKey = new RijndaelManaged())
{
symmetricKey.Mode = CipherMode.CBC;
using (ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream())
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
{
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
byte[] cipherTextBytes = memoryStream.ToArray();
return Convert.ToBase64String(cipherTextBytes);
}
}
}
}
}
}
catch (Exception)
{
return string.Empty;
}
}
public static string Decrypt(string cipherText, string passPhrase)
{
try
{
byte[] cipherTextBytes = Convert.FromBase64String(cipherText);
using (PasswordDeriveBytes password = new PasswordDeriveBytes(passPhrase, null))
{
byte[] keyBytes = password.GetBytes(keysize / 8);
using (RijndaelManaged symmetricKey = new RijndaelManaged())
{
symmetricKey.Mode = CipherMode.CBC;
using (ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes))
{
using (MemoryStream memoryStream = new MemoryStream(cipherTextBytes))
{
using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
{
byte[] plainTextBytes = new byte[cipherTextBytes.Length];
int decryptedByteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
return Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount);
}
}
}
}
}
}
catch (Exception)
{
return string.Empty;
}
}
}