How to Implement Threaded Server Socket Application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Threading;
namespace ServerSocketApp

Arrays in .NET Webservices

Web Service

public class Service1 : System.Web.Services.WebService
{
 [WebMethod]
 public int[] sort(int[] arr)
 {
  Array.Sort(arr);
  return arr;
 }
}

Then run the service.
Copy the URL of the WSDL
ex :  http://localhost:4886/Service1.asmx?WSDL

Reading Text from Files (C#.net)

private void button2_Click(object sender, EventArgs e)
{
try
{
 string buffer;
 StringBuilder stb = new StringBuilder();
 StreamReader strmRdr = File.OpenText("c:\\testfile.txt");
 while ((buffer = strmRdr.ReadLine()) != null)
 {
  stb.Append(buffer);
  stb.Append(Environment.NewLine);

Writing Text to files( C#.net )

private void button1_Click(object sender, EventArgs e)
{
 try
 {
  FileStream fileStrm = File.Open("c:\\testfile.txt", FileMode.OpenOrCreate);
  StreamWriter writer = new StreamWriter(fileStrm);
  writer.WriteLine("First Line");
  for (int i = 2; i < 100; i++)
  {
   writer.WriteLine("This is line {0}", i);

Using DataGridView to Show Data in a table

Selecting multiple files and show their information on a DataGridView

    public partial class Form1 : Form
    {
        private String[] selectedFiles;
        public Form1()
        {
            InitializeComponent();
        }

Using FileOpen Dialog

        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.Title = "Open a file to process";
            //selectable file types
            openFileDialog1.Filter = "Portable Document Format (*.pdf)|*.pdf|Text Documents(*.txt)|*.txt";
            openFileDialog1.InitialDirectory = "c:\";
            DialogResult respo= openFileDialog1.ShowDialog();
            if (respo == DialogResult.OK)
            {
                textBox1.Text = openFileDialog1.FileName;
            }
            else
            {
                textBox1.Text = "No selected file!";
            }
        }

Progressbar Update In C#.net

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace ThreaddedApp
{
    public partial class Form1 : Form
    {
        delegate void progressbarrunnerDelegate();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Invoke(new progressbarrunnerDelegate(progressbarrunner));
        }

        private void progressbarrunner()
        {
            for (int i = 0; i < 100; i++)
            {
                Thread.Sleep(50);
                this.progressBar1.Value = i;
                Application.DoEvents();
            }
        }
    }
}

Using GET and POST methods in J2ME

Most of the mobile applications are not alone. They frequently communicate with web services or web applications to accomplish their tasks. Lets see how to make GET and POST requests to a server.
We can use HttpConnection class to make requests.
Lets see what are the basic steps.

Python Note 8 (Python Utilities)

Summary
filenames = os.listdir(dir) -- list of filenames in that directory path (not including . and ..). The filenames are just the names in the directory, not their absolute paths.

import os

dir="c:/"
files=os.listdir(dir)
for path in files:
    print(path)
                 

Output :
addins
AppCompat
AppPatch
assembly
avastSS.scr
bfsvc.exe

Python Note 7 (the pickle module)

In python we can use serialization functionality using pickle module. it can save live instances of objects to files and retrieve object instances from pickled files.
Code:

import pickle

class Transaction : 
 def __init__(self,userName,trnsID,payment):
  self.userName=userName
  self.trnsID=trnsID
  self.payment=payment
 
 def __del__(self):
  print("Destructed!")
 
 def getPaymentValue(self):
  return self.payment
 
 def getUserName(self) :
  return self.userName
#end of the class