Poor man's version of a blog by octavio licea

Search files in C# recursively

2008-03-27T05:10:00Z

I found this piece of code to search a for a file that containing a pattern (extension, part of the name)

void DirSearch(string dir, string pattern)

{

try

{

foreach (string d in Directory.GetDirectories(dir))

{

foreach (string f in Directory.GetFiles(d, pattern))

{

Console.WriteLine("File found: {0}", f);

}

DirSearch(d);

}

catch (Exception ex)

{

Console.WriteLine("Something unexpected happened: {0}", ex);

}

I've always thought that the recursive algorithms are an easy small and elegant way to solve a problem, I first learned that in college while I was studying some of the "classical" samples of recursive problems, like fractals, the problem of the 8 queens, tree search, and other graph related problems, the-horse-in-the-chess-board (I am not sure of the name), and others

I'll try to remember some of those problems and try to solve them again using C#

Get Print Jobs using WMI and ManagmentObjects

2008-03-27T03:49:00Z

I found a way to get the print jobs from the spoiler using Management objects and WMI

public static void GetPrintJobs()

{

string searchQuery = "SELECT * FROM Win32_PrintJob";

ManagementObjectSearcher searchPrintJobs = new ManagementObjectSearcher(searchQuery);

ManagementObjectCollection prntJobCollection = searchPrintJobs.Get();

foreach (ManagementObject prntJob in prntJobCollection)

{

try

{

string document = prntJob.Properties["Document"].Value.ToString();

string color = prntJob.Properties["Color"].Value.ToString();

string host = prntJob.Properties["HostPrintQueue"].Value.ToString();

string owner = prntJob.Properties["Owner"].Value.ToString();

int id = int.Parse(prntJob.Properties["JobId"].Value.ToString());

int pages = int.Parse(prntJob.Properties["TotalPages"].Value.ToString());

Console.WriteLine("{0} Document '{1}', pages {2} {3}, sent by {4}\\{5}", id, document, pages, color, host, owner);

}

catch (Exception ex)

{

Console.WriteLine("Exception getting print jobs: " + ex);

}

one note about this code, it'll only work in Vista/LHS, to make it work in win xp/2k3 just don't ask for the property Color which aparently does not exist in previous versions of Windows.

you can find more information about the properties of the Win32_PrintJob class here http://msdn2.microsoft.com/en-us/library/aa394370.aspx

and a little more about WMI http://msdn2.microsoft.com/en-us/library/aa394582.aspx which in my opinion is a great way to manage windows, but it is kind of slow

How to configure SQL Mirron in SQL Server 2005 sp1

2007-10-02T17:40:00Z

For purposes of ilustrate this method:

PRINCIPAL will be the PRINCIPAL database server
MIRROR will be the MIRROR database server
myDB will be the database

MIRRORBackup the folder created in PRINCIPAL to store the backups

EP5022 will be the endpoint name and I will use the port 5022 to configure it

I will create an anonymous login and grant it access to connect using the endpoint, this is not very secure, so you may wan to change it

No witness is configured, if you need one, you’ll have to configure it as well

For each Database do:

Set Recovery mode, execute in PRINCIPAL:

ALTER DATABASE MyDB SET RECOVERY FULL

Create Backup Folder in PRINCIPAL(i.e. c:\backup)
Share the Backup Folder (make sure other users can modify the folder)
Create Endpoints:

Execute in PRINCIPAL

           if Not Exists (SELECT name, role_desc, state_desc FROM sys.database_MIRRORing_endpoints where name = 'EP5022')
            Begin
             CREATE ENDPOINT EP5022

                STATE=STARTED
                AS TCP ( LISTENER_PORT = 5022 ) FOR DATABASE_MIRRORING(ROLE = PARTNER)
            End
            if not exists( select * from sys.syslogins where loginname = 'NT AUTHORITY\ANONYMOUS LOGON')
            Begin
                    Create Login [NT AUTHORITY\ANONYMOUS LOGON] from windows
            End
            GRANT CONNECT ON ENDPOINT::EP5022 TO [NT AUTHORITY\ANONYMOUS LOGON]

Execute in MIRROR

                       if Not Exists (SELECT name, role_desc, state_desc FROM sys.database_MIRRORing_endpoints where name = 'EP5022')
            Begin
             CREATE ENDPOINT EP5022

                STATE=STARTED
                AS TCP ( LISTENER_PORT = 5022 ) FOR DATABASE_MIRRORING(ROLE = ALL)
            End
            if not exists( select * from sys.syslogins where loginname = 'NT AUTHORITY\ANONYMOUS LOGON')
            Begin
                    Create Login [NT AUTHORITY\ANONYMOUS LOGON] from windows
            End
            GRANT CONNECT ON ENDPOINT::EP5022 TO [NT AUTHORITY\ANONYMOUS LOGON]

Backup Database, Execute in PRINCIPAL

BACKUP DATABASE MyDB TO DISK = '\\PRINCIPAL\MIRRORBackup\MyDB.bak' WITH FORMAT

Kill Connections, Execute in PRINCIPAL

                declare @sql nvarchar(1000)
                declare @spid as int
                declare processcursor cursor fast_forward for
                select SPID
                from SYS.SYSPROCESSES p inner join sys.sysdatabases d on p.dbid= d.dbid and d.name = 'MyDB'
                where   SPID > 50
                        AND spid <> @@spid

open processcursor
fetch next from processcursor into @spid

                while @@fetch_status = 0
                begin
                    set @sql = ' kill ' + convert(varchar, @spid)
                    exec (@sql)
                    fetch next from processcursor into @spid
                end

                close processcursor
                deallocate processcursor

Restore Database, Execute in MIRROR
            if not exists(select * from sys.databases where name='MyDB')

            Begin
                    Create Database MyDB
            End
            RESTORE DATABASE MyDB FROM DISK = '\\PRINCIPAL\MIRRORBackup\MyDB.bak' WITH REPLACE, NORECOVERY'

Backup Log, Execute in PRINCIPAL

BACKUP Log MyDB TO DISK = '\\PRINCIPAL\MIRRORBackup\MyDB_log.bak'

Kill Connections, Execute in MIRROR

open processcursor
fetch next from processcursor into @spid

close processcursor
deallocate processcursor

Restore Log, Execute in MIRROR,

RESTORE Log MyDB FROM DISK = '\\PRINCIPAL\MIRRORBackup\MyDB_log.bak' WITH NORECOVERY'

Enable MIRRORing:

Execute in PRINCIPAL

ALTER DATABASE MyDB SET PARTNER = 'TCP://PRINCIPAL.mydomain.com:5022'

Execute in MIRROR

ALTER DATABASE MyDB SET PARTNER = 'TCP://MIRROR.mydomain.com:5022'

Now everything should be ok now, and the Database is already configured.