Tag: online notes

Note 1: Remove diacritics (special characters) from string

private static string RemoveDiacritics(string text)
{
	string textNormalized = text.Normalize(NormalizationForm.FormD);
	StringBuilder stringBuilder = new StringBuilder();

	for (int index = 0; index < textNormalized.Length; index++)
	{
		UnicodeCategory uc = CharUnicodeInfo.GetUnicodeCategory(textNormalized[index]);
		if (uc != UnicodeCategory.NonSpacingMark)
		{
			stringBuilder.Append(textNormalized[index]);
		}
	}

	return (stringBuilder.ToString().Normalize(NormalizationForm.FormC));
}

Continue reading My online notes – Section 0008

Note 1: Sony Ericsson PC Suite for Z610i
http://www.megaupload.com/?d=V7II5C41

Note 2: Set autostart for program

private Boolean SchreibeinAutostart( String dateipfad )
{
    try
    {
        String samAccountName;
        {
            var currentWindowsIdentity = WindowsIdentity.GetCurrent( );
            if ( currentWindowsIdentity == null )
            {
                return false;
            }

            samAccountName = currentWindowsIdentity.Name;
        }

        var registrySecurity = new RegistrySecurity( );
        {
            registrySecurity.AddAccessRule( new RegistryAccessRule( samAccountName,
                    RegistryRights.WriteKey | RegistryRights.ChangePermissions, InheritanceFlags.None, PropagationFlags.None, AccessControlType.Allow ) );
        }

        var targetRegistryKey = Registry.CurrentUser.CreateSubKey( "Software\\Microsoft\\Windows\\CurrentVersion\\Run\\" );

        if ( targetRegistryKey == null )
        {
            return false;
        }

        targetRegistryKey.SetValue( dateipfad.Remove( 0, dateipfad.LastIndexOf( @"\" ) + 1 ), dateipfad );

    }
    catch ( Exception )
    {
        return false;
    }

    return true;
}

Continue reading My online notes – Section 0006

Note 1: Impersonation for accessing network path

private void ApplyUserCredentials(string Share, string Domain, string Username, string Password)
{
	USE_INFO_2 useInfo = new USE_INFO_2();
	useInfo.ui2_local = string.Empty;
	useInfo.ui2_remote = Share;
	useInfo.ui2_password = Password;
	useInfo.ui2_asg_type = 0;    //disk drive
	useInfo.ui2_usecount = 1;
	useInfo.ui2_username = Username;
	useInfo.ui2_domainname = Domain;
	uint paramErrorIndex;

	uint returnCode = NetUseAdd(null, 2, ref useInfo, out paramErrorIndex);
	if (returnCode != 0)
	{
		throw new Win32Exception((int)returnCode);
	}
}

[DllImport("NetApi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern UInt32 NetUseAdd(string UncServerName,UInt32 Level, ref USE_INFO_2 Buf,  out UInt32 ParmError);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct USE_INFO_2
{
	internal string ui2_local;
	internal string ui2_remote;
	internal string ui2_password;
	internal UInt32 ui2_status;
	internal UInt32 ui2_asg_type;
	internal UInt32 ui2_refcount;
	internal UInt32 ui2_usecount;
	internal string ui2_username;
	internal string ui2_domainname;
}

Continue reading My online notes – Section 0005

Note 1: Proxy of HttpWebRequest for uploading

HttpWebRequest HttpRequest = (HttpWebRequest)WebRequest.Create(this.fullUrl);

<system.net>
    <defaultProxy enabled ="false">
		<proxy autoDetect ="True"/>
    </defaultProxy>
</system.net>

Note 2: Walkthrough: Implementing Virtual Mode in the Windows Forms DataGridView Control for page loading
http://msdn.microsoft.com/en-us/library/15a31akc.aspx

Continue reading My online notes – Section 0004

Note 1: Check if current user is administrator

WindowsPrincipal principal = new WindowsPrincipal(WindowsIdentity.GetCurrent());
Console.WriteLine("Programm wird unter dem Usercontext ausgeführt: {0}", principal.Identity.Name);
Console.WriteLine("Adminrechte vorhanden: {0}", principal.IsInRole(WindowsBuiltInRole.Administrator) ? "Ja" : "Nein");

Note 2: ContextMenuStrip at selected row open and Index in DataTable localize.

private void dgv_MouseUp(object sender, MouseEventArgs e)
{
  DataGridView.HitTestInfo hitTest = ((DataGridView)sender).HitTest(e.X, e.Y);

  if (hitTest .Type == DataGridViewHitTestType.Cell)
  {
     dgv.CurrentCell = dgv.Rows[hTest.RowIndex].Cells[hTest.ColumnIndex];
  }
}

Continue reading My online notes – Section 0003

0. Keep system updated

landscape-sysinfo
sudo apt-get update        # Fetches the list of available updates
sudo apt-get upgrade       # Strictly upgrades the current packages
sudo apt-get dist-upgrade  # Installs updates (new ones)
sudo apt-get autoremove
sudo reboot

1. How to enable root?

sudo passwd root

2. Enable SSH for root?

sudo nano /etc/ssh/sshd_config

Add a line in the Authentication section of the file that says PermitRootLogin yes.

# Authentication:
#LoginGraceTime 2m
PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

Save the updated /etc/ssh/sshd_config file.

Restart the SSH server

service sshd restart

3. Install Nginx.

sudo apt update
sudo apt install nginx

4. Create a link site

ln -s /etc/nginx/sites-available/example.com /etc/nginx/sites-enabled/

Restart nginx

service nginx restart

4. Install .Net Core Runtime

wget https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

sudo dpkg -i packages-microsoft-prod.deb

sudo apt-get update

sudo apt-get install -y apt-transport-https

sudo apt-get update

sudo apt-get install -y aspnetcore-runtime-3.1

5. Install Certbot

sudo apt install certbot python3-certbot-nginx

sudo certbot --nginx -d numerology.hintdesk.com

6. Install supervisor

sudo apt-get install supervisor

sudo nano /etc/supervisor/conf.d/hwapp.conf

[program:numerologyapi]
command=/usr/bin/dotnet /var/www/api.thanso.net/Numerology.dll
directory=/var/www/api.thanso.net/
autostart=true
autorestart=true
stderr_logfile=/var/log/numerology.err.log
stdout_logfile=/var/log/numerology.out.log
environment=ASPNETCORE_ENVIRONMENT=Production
user=www-data
stopsignal=INT

Restart supervisor

sudo service supervisor restart
sudo tail -f /var/log/supervisor/supervisord.log

10. Install unzip

sudo apt-get install -y unzip

11. Change owner of a folder

sudo chown -R www-data:www-data api.thanso.net