Web Development Posts - www.netartmedia.net/blog

Category: Web Development

What is Vue.js, why developers use it and what are its main advantages and disadvantages ...

What is Vue.js? Vue is an evolving framework for building user interfaces. Evan You, the creator of Vue.js, wanted to create a frontend framework as powerful as Angular, but also "lighter" and more ...

Mon, 13 June 2022

How to get a list of IP addresses associated with a host?

How to get a list of IP addresses associated with a host? The method listed below returns a string array containing IP addresses that resolve to the host name. public string[] getIPList(string ...

Mon, 28 March 2022

How to monitor the network performance using Performance counter?

This is a sample code demonstrating how to get the \"Bytes Sent/sec\" counter of the 3Com network adapter: System.Diagnostics.PerformanceCounter performanceCounter1; performanceCounter1 = new System.Diagnostics.PerformanceCounter(); performanceCounter1.CategoryName = \"Network Interface\"; performanceCounter1.CounterName = \"Bytes Sent/sec\"; performanceCounter1.InstanceName = \"3Com ...

Fri, 25 March 2022

How to write a simple exception handler function in Perl

$SIG{__DIE__} = sub { print "Exception: ".$_[0]."\n"; print "My Exception Handler\n\n\n"; }; die("REASON");

Sat, 19 March 2022

How to get all the processes in Microsoft SQL Server and store them in DataSet?

The method listed below returns a dataset which contains information for all the processes in Microsoft SQL Server database, the name of the SQL server is passed by a parameter.<br> public ...

Wed, 16 March 2022

How to do replacement in a string using regular expression?

For example - replace every \"Alice\" with \"Bob\": $string =~ s/Alice/Bob/;

Sun, 27 February 2022

How to read / download the content of a web page using C# and store it in a file?

using System; using System.IO; using System.Net; using System.Text; ... public static void GetFile ( string strURL, string strFilePath ) { WebRequest myWebRequest = WebRequest.Create(strURL); WebResponse myWebResponse = myWebRequest.GetResponse(); Stream ReceiveStream = myWebResponse.GetResponseStream(); ...

Tue, 15 February 2022

How to use the static Regex.Split() to split strings in C# ?

As you might know the string Split method allows you to split astring only be a specified character. If you wish to split a string using the power of the ...

Fri, 28 January 2022

How to append a text to a file?

try { BufferedWriter out = new BufferedWriter(new FileWriter(\"filename\", true)); out.write(\"aString\"); ...

Tue, 25 January 2022

How to work with Comparer in order to sort files by date?

using System; using System.Collections; using System.IO; namespace InfoSystem { /// <summary> /// This class is created by Anton Zamov /// For more information about Anton Zamov /// and a lot of other useful examples /// please visit ...

Sat, 22 January 2022

How to export a MySQL Table to a Flat File?

The default format of a file exported from MySQL is as follows: the fields are separated by tabs, the lines terminated by \'\\n\', and backslashes(\\), newlines (\\n), and tabs (\\t) ...

Fri, 17 December 2021

How to declare and call a subroutine in Perl?

sub MY_SUB { local ( $param_1, $param_2 ) = @_ ; print \"\\n Called MY_SUB \\n \\t $param_1 \\n \\t $param_2 \\n\" ; } # # MAIN part of the program # for ...

Mon, 6 December 2021

How to create and use System.Timers.Timer object

This example shows you how to create and use a Timer object. The example will print "Hello" every second. // create the timer set the event handler Timer timer = new Timer(); // set ...

Mon, 22 November 2021

How to receive message from a Microsoft message queue?

The sample code below shows how to connect to a message queue and receive a message System.Messaging.MessageQueue queue = new System.Messaging.MessageQueue(".\\Private$\\MyPrivateQueue"); queue.Send("Sample message"); System.Messaging.Message msg = queue.Receive(); msg.Formatter = new System.Messaging.XmlMessageFormatter( new string[] {"System.String"}); Console.WriteLine(msg.Body);

Sat, 20 November 2021

How to create a program whose input is a piped in directory command and whose output is stdout, and whose output represents a batch file which copies every file (not directory) older than specific date?

while(<STDIN>) { my($line) = $_; chomp($line); if($line !~ /<DIR>/) #directories don\'t count { ...

Wed, 10 November 2021

How to sort files by their creation date?

Mon, 11 October 2021

Perl regular expressions character classes

\\d A digit, same as [0-9] \\D A nondigit, same as [^0-9] \\w A word character (alphanumeric), same as [a-zA-Z_0-9] \\W A nonword character, [^a-zA-Z_0-9] \\s A whitespace character, same ...

Sat, 9 October 2021

How to assign the lines contained in a text file to an array?

$file = \'data.txt\' ; # Name the file open(INFO, \"<$file\" ) ; ...

Thu, 23 September 2021

How to read text from a file?

try { BufferedReader in = new BufferedReader(new FileReader(\"infilename\")); String str; ...

Sat, 18 September 2021

How to create a context menu and attach it to a control?

System.Windows.Forms.ContextMenu contextMenu1; contextMenu1 = new System.Windows.Forms.ContextMenu(); System.Windows.Forms.MenuItem menuItem1; menuItem1 = new System.Windows.Forms.MenuItem(); System.Windows.Forms.MenuItem menuItem2; menuItem2 ...

Wed, 15 September 2021

How to create a zip file?

// These are the files to include in the ZIP file String[] filenames = new String[]{\"filename1\", \"filename2\"}; // Create a buffer for reading the ...

Sun, 12 September 2021

How to get a Perl script start time?

For this purpose you may use the special Perl global variable $^T which return the script's start time. You may try the following: print $^T;

Sat, 4 September 2021

How to strip HTML tags with an regular expression?

$stripped =~ s/<.*>//g;

Wed, 1 September 2021

How to the disk size and the free disk space?

using System; using System.Management; ... ManagementObject disk = new ManagementObject(\"win32_logicaldisk.deviceid=\\\"c:\\\"\"); disk.Get(); Console.WriteLine(\"Logical Disk Size = \" + disk[\"Size\"] + \" bytes\"); Console.WriteLine(\"Logical Disk FreeSpace = \" + disk[\"FreeSpace\"] + \" bytes\");

Sat, 14 August 2021

How to get the available RAM and the cpu usage in percents?

These methods are very usefull in order to monitor the system and particulary the amount of the available RAM in MB (MegaBytes) and the cpu usage in percents. /* First you have ...

Tue, 3 August 2021

How to load a flat file in a MySQL database?

The default format of a file to load into a MySQL table is as follows: the fields must be separated by tabs, the input lines terminated by \'\\n\', ...

Thu, 22 July 2021

Example of creation of Groups and using Group classes

string strText="212.56.87.23 netartmedia.net"; Regex oRegex=new Regex(@"(?<IP_ADDRESS>(\d|\.)+)\s"+@"(?<URL>\S+)"); MatchCollection oMatchCollection=oRegex.Matches(strText); foreach(Match oMatch in oMatchCollection) { Console.WriteLine("IP: "+oMatch.Groups["IP_ADDRESS"]); Console.WriteLine("URL: "+oMatch.Groups["URL"]); } /* * will print to the screen IP: 212.56.87.23 URL: netartmedia.net ...

Tue, 20 July 2021

How to increase the request size limit and make possible the upload of larger files?

If you ever used the ASP.NET file upload control you may be have noticed that if you try to upload a file which size exceeds 4MB, the upload fails. The reason ...

Thu, 15 July 2021

May I use 2 programming languages in one aspx file?

No, this is not possible. It's because of the fact that in ASP.NET, parsers are used in order to strip the code from the files and copy it to ...

Sat, 10 July 2021

Regular expressions, using wildcards?

. Match any character \\w Match \"word\" character (alphanumeric plus \"_\") \\W Match non-word character \\s Match whitespace character \\S Match non-whitespace character \\d Match digit character \\D ...

Wed, 7 July 2021

How to connect to a SQL Server database using JDBC?

This example connects to a SQLServer database using the NetDirect JDBC driver. Connection connection = null; try { ...

Fri, 11 June 2021

How to get the host name from an IP address?

The method listed below returns the IP associated with a specific host name passed by a parameter. public string getHost(string ip) { IPHostEntry IpEntry = Dns.GetHostByAddress(ip); return iphostentry.HostName.ToString(); }

Fri, 7 May 2021

How to find what functions perl has?

You may simply execute the following command: >perldoc perlfunc and you'll be able to see their list.

Mon, 26 April 2021

How to use SaveFileDialog to save text files?

Stream myStream ; SaveFileDialog saveFileDialog1 = new SaveFileDialog(); saveFileDialog1.Filter = \"txt files (*.txt)|*.txt|All files (*.*)|*.*\" ; saveFileDialog1.FilterIndex = 2 ; saveFileDialog1.RestoreDirectory = true ; if(saveFileDialog1.ShowDialog() == DialogResult.OK) { if((myStream = saveFileDialog1.OpenFile()) != null) { StreamWriter wText ...

Thu, 15 April 2021

How to synchronize the access to a ressource using Mutex?

The Mutex class provides very useful functionality when you use multiple threads and you need to synchronize the access to a given ressource. Imagine the situation when you have multiple threads ...

Wed, 7 April 2021

How to connect to a MySQL database using JDBC?

This example connects to a MySQL database using the MM JDBC driver for MySQL. You need to have an account in MySQL database to run this example. To create an ...

Sat, 27 March 2021

How to count the sum in bytes of all the files contained in a folder?

my($totalBytes) = 0; while(<STDIN>) { my($line) = $_; chomp($line); if($line !~ /<DIR>/) #directories don\'t count ...

Mon, 8 March 2021

How to read an Excel file with OleDb and a simple SQL query?

This approach is extremely useful when you need to read the data from an Excel file fast and store the data in a DataTable for further usage. using System.Data; using System.Data.OleDb; ...

Sat, 6 March 2021

How to read the content of a web page as a string?

use LWP::Simple; $pageURL=\"http://www.google.com\"; $simplePage=get($pageURL);

Thu, 18 February 2021

How to read a content of a web page using C# and store into a string variable?

// Create a 'WebRequest' object with the specified url. WebRequest myWebRequest = WebRequest.Create("http://zamov.online.fr"); // Send the 'WebRequest' and wait for response. WebResponse myWebResponse = myWebRequest.GetResponse(); // Obtain a 'Stream' object associated with the response ...

Sun, 7 February 2021

How to call an ASP.NET web service from client script?

A very simple web service to add 2 numbers: <%@ WebService Language=\"C#\" class=MyMath %> using System; using System.Web.Services; public class MyMath { [WebMethod] public int add(int a, int b) ...

Tue, 26 January 2021

How do I get the length of a string?

$string_length = length($string);

Tue, 12 January 2021

How to send NET SEND messages ( Windows 2000 and Windows XP only )?

Have you ever send messages to the local network using the command promt and the well known command \"net send\"?.<br> The 2 methods listed below allows you to make exactly the ...

Mon, 4 January 2021

How to serialize an object?

Object object = new javax.swing.JButton(\"push me\"); try { // Serialize to a ...

Wed, 23 December 2020

How to convert string to decimal?

There are two main possibilities to do this Convert.ToDecimal(strValue) or Decimal.Parse(strValue)

Tue, 22 December 2020

How do I read an entire file as a string?

my $data; $file = \"myfile.dat\"; { local $/; open SLURP, $file or die \"can\'t open $file: $!\"; $data = <SLURP>; ...

Tue, 15 December 2020

How do I create or remove (delete) a series of directories?

use File::Path; mkpath(\'a/b/c\'); # Create all directories in this path. rmtree(\'x/y/z\'); # Remove this directory and its subdirectories.

Fri, 11 December 2020

How to catch exceptions with eval in Perl?

This approach is useful when you wish to see the reason why the script "has died" in some part of the program. Consider the following example: eval ...

Fri, 11 December 2020

List of Perl pattern match variables

Parentheses not only serve to group elements in a regular expression, they also remember the patterns they match. Every match from a parenthesized element is saved to a special, read-only ...

Mon, 30 November 2020

How list all loaded JDBC drivers and gets information about each one?

This example lists all loaded JDBC drivers and gets information about each one. List drivers = Collections.list(DriverManager.getDrivers()); for (int i=0; i<drivers.size(); i++) ...

Sun, 15 November 2020

How to get information for the system processes?

In fact this methos provide the same information for the system processes as the well known Windows Task Manager. public DataSet getProcesses() { Process[] procs; TimeSpan cputime; procs = Process.GetProcesses(); DataSet myDataSet = new DataSet(\"myDataSet\"); DataTable ...

Tue, 10 November 2020

Regular Expression Search and Replace Java Example

import java.util.regex.*; public class BasicReplace { public static void main(String[] ...

Wed, 4 November 2020

How to strip the HTML tags from text with C# and Regular expression?

string strResult = Regex.Replace(strInput,@"<(.|\n)*?>",string.Empty);

Sun, 1 November 2020

How to find what Perl manpages are available on your system?

You may simply execute the following command: >perldoc perl and you'll be able to see their list.

Fri, 18 September 2020

How to write more complex SMIL presentation?

Fri, 11 September 2020

How to iterate through the selected values of a ListView object?

ListView.CheckedListViewItemCollection vc=lv.CheckedItems; string[] strValues=new string[lvFiles.CheckedItems.Count]; for(int i=0;i<vc.Count;i++) { strValues[i]=lv.Items[vc[i].Index].SubItems[0].Text; }

Mon, 31 August 2020

How do I recurse through the files in a directory tree?

# here\'s the File::Find way use File::Find; find(sub { print \"$File::Find::name\\n\" }, @ARGV); # here\'s the do-it-yourself way sub do_file { ...

Sun, 30 August 2020

How to launch an instance of the default browser and load a web page in it?

Example: System.Diagnostics.Process.Start(\"http://www.google.com\");

Wed, 26 August 2020

Invoke a method with Reflection

// dynamically create or activate(if exist) object object obj = Activator.CreateInstance(strType); // get required method by specifying name MethodInfo mi = typ.GetMethod(strMethodName); mi.Invoke(0, null);

Sun, 23 August 2020

How to Apply Regular Expressions on the Contents of a File?

The matching routines in java.util.regex require that the input be a CharSequence object. This example implements a method that efficiently returns the contents of a file in a CharSequence object. ...

Fri, 14 August 2020

How to write to a file?

If the file does not already exist, it is automatically created. try { BufferedWriter ...

Sun, 9 August 2020

How to list all the files in a directory?

File dir = new File(\"directoryName\"); String[] children = dir.list(); if (children == null) { ...

Thu, 30 July 2020

How to send an email using javax.mail?

<%@ page import=\"java.util.*, javax.mail.*, javax.mail.internet.*\" %> <% Properties props = new Properties(); props.put(\"mail.smtp.host\", \"mailserver.com\"); Session s = Session.getInstance(props,null); InternetAddress from = new InternetAddress(\"mail@mail.com\"); InternetAddress to = new ...

Sun, 26 July 2020

How do I loop through/list the files in a directory?

@files = </home/user/*>; @all_files = </home/user/* /home/user/.*>; @all_files = glob \"/home/user/* /home/user/.*\"; opendir DIRH, \"/home/user\" or die \"couldn\'t open: $!\"; foreach (sort readdir <DIRH>) { ...

Sat, 25 July 2020

How to read the HTML content of a web page and store it in a string?

using System; using System.IO; using System.Net; using System.Text; ... public string ReadPage ( string strURL ) { WebRequest myWebRequest = WebRequest.Create(strURL); WebResponse myWebResponse = myWebRequest.GetResponse(); Stream ReceiveStream = myWebResponse.GetResponseStream(); ...

Thu, 23 July 2020

What is the difference between do() and require() in Perl?

These two functions are almost identical, the difference between them is that do() doesn't check %INC to see if the file has already been loaded. It reloads unconditionally every time ...

Sat, 18 July 2020

C# Regular expressions: Example of creation of Groups and using Group classes

Wed, 15 July 2020

How to run an SQL Select query using JDBC?

A SQL SELECT query is used to get data from a table. The results of the select query is called a result set. try { ...

Tue, 14 July 2020

How to read data from the Windows event log?

use Win32::EventLog; # each event has a type, this is a translation of the common types %type = (1 => \"ERROR\", 2 ...

Mon, 6 July 2020

How to get the active processes running in Microsoft SQL Server database?

The method listed below returns a dataset containing information for the active processes running in Microsoft SQL Server.<br> public DataSet GetActiveProcesses(string serverName,string user, string password) { DataSet ds = new DataSet(); ...

Sun, 31 May 2020

How to check the list of messages in a mailbox using pop3 and Net::POP3?

The simple example below shows the basic steps in order to check the list of messages in a mailbox using pop3 and Net::POP3 with Perl use Net::POP3; # Create a new POP3 ...

Wed, 13 May 2020

Information for some special symbols in Perl regular expressions.

=~ This operator appears between the string var you are comparing, and the regular expression you\'re looking for (note that in selection or substitution a regular expression operates on the string ...

Sat, 9 May 2020

How to get data from a result set?

try { // Create a result set containing all data from my_table ...

Mon, 20 April 2020

PHP Session Unset

Session unset works well when you're looking to end particular sessions under certain circumstances. This example will explain how, along with a conditional statement which returns a particular message, depending ...

Wed, 1 August 2018

Variable Handling Functions PHP

There are several variable handling functions in PHP, but in this article I will cover 4 that I use regularly when scripting. These examples are fairly basic, but should provide ...

Wed, 1 August 2018

Simple Login Script Using PHP Variables

Login scripts created with PHP don't have to be extremely complex. In fact, I find the simpler the better in this regard. Our main goal is to create a basic, ...

Wed, 1 August 2018

Insert File Name Array Into MySQL

I thought this would make a resourceful bit of code for the PHP Tool Box, seeing as I find many articles online on the topic of uploading multiple images and ...

Wed, 1 August 2018

Upload Files and Produce HTML Code

I've had quite a few visitors download my Quick Image Code Creator free script, which tells me that it is something that many people find quite useful. That being said, ...

Wed, 1 August 2018

PHP If and Else Statements

PHP conditional statements are fantastic, offering coders a large variety of possibilities when it comes to handling variables and data. Whether the data comes from a database or otherwise, using ...

Wed, 1 August 2018

Sorting Arrays PHP

As I've mentioned in the past, it's always good to have a number of tools in your PHP box that can come to the rescue in any given situation. Those ...

Wed, 1 August 2018

File System Functions in PHP

Manipulating system files with PHP is quite in important process when it comes to web development. The ability to find, edit, copy and back up relevant directory files is something ...

Wed, 1 August 2018

Reading File Contents With PHP

One of the many reasons I like PHP so much is that it allows for manipulating content in pretty much any context. A person could possibly code out a bunch ...

Wed, 1 August 2018

PHP Character Function

Characters, they make up the gist of what we see on the internet. Whether they are of the alphanumeric, numeric or printable variety, it's certainly helpful to have a function ...

Wed, 1 August 2018

PHP Calendar Function

The PHP date and time functions suit me just fine as web developer, doing everything I need for returning related date and time information. However, that doesn't mean that I'm ...

Wed, 1 August 2018

Assorted PHP Functions

Having so many built-in functions within the language of PHP is something we should all take advantage of as much as possible. There are many that will seldom be used, ...

Wed, 1 August 2018

PHP Date and Time Functions

It goes without saying that having the ability to display, work with and manipulate date and time would be a relevant part of web developing with PHP. While there are ...

Wed, 1 August 2018

How PHP Session Unset Works

During my introduction to PHP sessions article I apparently forgot to include the 'unset' function within the code. My apologies for that. Better late than never though. Session unset works well ...

Wed, 1 August 2018

PHP Super Globals

There are a lot of super global options within the PHP language, so I could never cover them all and provide examples for each in one article. I can, however, ...

Wed, 1 August 2018

Array Each Function - Return Alternative

PHP array 'each' is actually a 'branch', if you will, of the 'foreach' statement. Which is fairly obvious, given the word 'for' has been removed from the term. In the ...

Wed, 1 August 2018

PHP Count Function

From the moment we wake to the time we're going to bed, we humans are consistently counting. Whether it's minutes on the clock to make sure we meet our morning ...

Wed, 1 August 2018

PHP Strpos Function

Question/answer sessions and interviews are quite popular on the internet, especially within the entertainment industry. Looking at that, I thought I would create a fake interview excerpt using a string ...

Wed, 1 August 2018

Strtolower and Strtoupper PHP Functions

Eventually, I will cover just about every built-in function within the PHP language, but I do like to choose my favorites and the ones I use most often while developing ...

Wed, 1 August 2018

Str_Split PHP Function

Splitting a string up according to how we would like isn't too, too difficult to do with PHP. When you know the parameters that can be used and how to ...

Wed, 1 August 2018

Substr PHP Function

In a nutshell, the substr PHP function is used to pull out certain pieces of a string and return them according to how it's starting and ending parameters are set. ...

Wed, 1 August 2018

PHP Header Function

If you're having issues with visitors leaving your website because they are sometimes forced to resubmit a form they have already processed then this PHP Tool Box article may help ...

Wed, 1 August 2018

Simple PHP Captcha Script Tutorial

One of my main credos is 'Keep It Simple Stupid'. While developing in PHP can sometimes entail a lot of code, this doesn't always have to be so. Especially when ...

Wed, 1 August 2018

PHP Sessions - The Basics

PHP sessions are incredible, to say the very least. For those who may not be aware, there are shopping cart systems on the internet which are based almost solely on ...

Wed, 1 August 2018

PHP Random Image Script

Who couldn't use a random image script? Most people use one for displaying images in headers or sidebars that usually lead to a sponsored product, but sometimes they can also ...

Wed, 1 August 2018

Introduction To PHP GD Image Creation

The GD image library for PHP is quite robust and even out of the box offers much in the way of graphic manipulation. There is a bit of a learning ...

Wed, 1 August 2018

Str_Replace PHP Function

During my time as a PHP web developer I have come across numerous scripts that needed to be updated and/or completely re-written, for any number of reasons. I don't think ...

Wed, 1 August 2018

Processing Form Textarea Lists

HTML Form Textarea Bulk List - PHP Processing There is no such thing as knowing too much when it comes to processing HTML form data with PHP. No matter what context ...

Wed, 1 August 2018

Embedding Media On Web Pages

How To Embed MP3, MP4 and YouTube Media Embedding media is a large part of web development these days and for those who aren't concerned about people downloading their media, these ...

Wed, 1 August 2018

Logical Operators In PHP

Understanding Basic Logical Operators Although I have used logical operators quite extensively already here at PHP-Scripting I thought it would be helpful to do an article on them. There are quite ...

Wed, 1 August 2018

The new Bootstrap version 4 - differences between Bootstrap 3 and 4

Recently, a new, 4th version of Bootstrap was released and in this article we'll make a quick overview about what's new in this version, how it differs from version 3 ...

Sat, 5 May 2018

15 mistakes in the main menu, we need to avoid

The main menu is a major and probably the most important part of any website -it shapes the website vision, directs the users and has both a practical and aesthetic ...

Tue, 10 April 2018