Online Home of Yash Kapoor

Saturday, November 27, 2021

Session time in asp.net

If you want to set the timeout to 20 minutes, use something like this:

    <configuration>
      <system.web>
         <sessionState timeout="20"></sessionState>
      </system.web>
    </configuration>

reference:-  https://stackoverflow.com/questions/1205828/how-to-set-session-timeout-in-web-config

https://www.c-sharpcorner.com/blogs/how-to-set-session-timeout-in-asp-net1

Change the website white background to black in google chrome dark mode - Chrome black extension

There are two options:-

1)You can change by using

chrome://flags/#enable-force-dark

>Click on enable(select "enabled with simple cielab based inversion") or (select "enable with selective inversion of everything") and than click on Relaunch.(Screenshot below)

or the best option you can select that I have tested (enabled the selective inversion of non-image elements)

----------------------------------*********************-----------------------------------

2) You can click on Customize Chrome (screenshot below)

>Than click on Colors and themes.(screenshot below)

>Select the color and Click on done.

Extensions are for chrome

https://chrome.google.com/webstore/detail/dark-reader/eimadpbcbfnmbkopoojfekhnkhdbieeh

https://darkreader.org/

Extensions that are working for chrome

https://mybrowseraddon.com/dark-mode.html

https://chromewebstore.google.com/detail/dark-mode/dmghijelimhndkbmpgbldicpogfkceaj?hl=en

Friday, November 26, 2021

server.mappath in asp.net

Server.MapPath(".")¹ returns the current physical directory of the file (e.g. aspx) being executed
Server.MapPath("..") returns the parent directory
Server.MapPath("~") returns the physical path to the root of the application
Server.MapPath("/") returns the physical path to the root of the domain name (is not necessarily the same as the root of the application)

reference:- https://stackoverflow.com/questions/275781/server-mappath-server-mappath-server-mappath-server-mappath

Encryption and decryption of password in asp.net

//For decryption of password

-----------------------------***************************------------------------------

private string Decrypt(string clearText)
{
string EncryptionKey = "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789";
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = Convert.ToBase64String(ms.ToArray());
}
}
return clearText;
}

------------------------********************--------------------

For encryption of password

private string Encrypt(string clearText)
{
string EncryptionKey = "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789";
byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
using (Aes encryptor = Aes.Create())
{
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
{
cs.Write(clearBytes, 0, clearBytes.Length);
cs.Close();
}
clearText = Convert.ToBase64String(ms.ToArray());
}
}
return clearText;
}