.Net Skills

5/11/2023

.NET Framework system requirements (Servers)

Source: Microsoft Webbsite

Supported server operating systems

.NET Framework system requirements (Clients)

Source: Microsoft Website

Supported client operating systems

12/31/2022

1/18/2022

Download YouTube videos (Including Playlist) without downloader software

10/08/2021

Conditional Formatting in Asp .Net Web Form Gridview

<asp:TemplateField HeaderText="Status" SortExpression="Status">
     <EditItemTemplate>
        <asp:Label ID="lblStatus" runat="server" Text='<%# Eval("Status") %>'></asp:Label>
     </EditItemTemplate>
     <ItemTemplate>
        <asp:Label ID="lblStatus" runat="server" Text='<%# Bind("Status") %>' ForeColor='<%# ((string)Eval("Status")).ToLower().Equals("open") ? System.Drawing.Color.Green : System.Drawing.Color.Red %>'></asp:Label>
     </ItemTemplate>
 </asp:TemplateField>

9/24/2021

Fill a column with a series of numbers in Excel

9/16/2021

Point Of Sale System _ C# Windows Form _ Part 1

7/20/2021

C# Regular Expression - Windows Form Application (Username Validation)

   private void txtUsername_TextChanged(object sender, EventArgs e)
        {
            if (IsValidUsername(txtUsername.Text))
            {
                lblMsg.ForeColor = System.Drawing.Color.Green;
                lblMsg.Text = "Valid Username";
            }
            else
            {
                lblMsg.ForeColor = System.Drawing.Color.Red;
                lblMsg.Text = "Invalid Username!";
            }
        }
        public static bool IsValidUsername(string username)
        {
            //Username starts with a letter, allow letter or number, length between 7 to 12.
            string pattern;
            pattern = @"^[a-zA-Z][a-zA-Z0-9]{6,11}$";
            Regex regex = new Regex(pattern);
            return regex.IsMatch(username);
        }

12/31/2020

12/14/2019

How To Display Selected CheckedListBox Items In TextBox Separated By Comma In C#

how to display selected checkedlistbox items in textbox separated by comma in c#

private void checkedListBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string values = "";
            foreach (object item in checkedListBox1.CheckedItems)
            {
                if (values == "")
                    values = item.ToString();
                else values += "," + item.ToString();

            }
            textBox1.Text = values;
        }

11/04/2019

Python Pattern

def pattern(n):
    num=65
    for i in range(0,n):
        for j in range(0,i+1):
            print(chr(num),end=" ")
        num = num + 1
        print("\r")
              
pattern(9)

7/01/2019

Windows Logo (Python)

from turtle import *
speed(1)
bgcolor('black')
penup()
goto(-50,60)
pendown()
color("#00adef")
begin_fill()
goto(100,100)
goto(100,-100)
goto(-50,-60)

goto(-50,60)
end_fill()

color("black")
goto(15,100)
color("black")
width(10)
goto(15,-100)
penup()
goto(100,0)
pendown()
goto(-100,0)
done()

6/30/2019

Stopwatch C# windows form

Stopwatch

Stopwatch Design Foorm

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace StopwatchProject
{
    public partial class frmStopwatch : Form
    {
        private Stopwatch mainStopwatch;
        private Stopwatch smallStopwatch; // New stopwatch for small timer  
        private Timer mainTimer;
        private Timer smallTimer; // New timer for small stopwatch  
        private int lapCount;
        private TimeSpan lastLapTime;
        public frmStopwatch()
        {
            InitializeComponent();
            mainStopwatch = new Stopwatch();
            smallStopwatch = new Stopwatch(); // Initialize small stopwatch  
            mainTimer = new Timer();
            smallTimer = new Timer(); // Initialize small timer  
            mainTimer.Interval = 100; // Update every 100ms  
            smallTimer.Interval = 100; // Update every 100ms for small timer  
            mainTimer.Tick += MainTimer_Tick;
            smallTimer.Tick += SmallTimer_Tick; // Event for small timer  
            lblTime.Text = "00:00:00.00"; // Initial time for main stopwatch  
            lblSmallTime.Text = "00:00:00.00"; // Initial time for small stopwatch  
            lapCount = 0; // Initialize lap count  
            lblLapCount.Text = "Lap Count: 0"; // Initialize lap count display  
            lastLapTime = TimeSpan.Zero; // Initialize last lap time 

            // Set up DataGridView columns  
            dataGridViewLaps.Columns.Add("LapNumber", "Lap");
            dataGridViewLaps.Columns.Add("LapTime", "Lap Times");
            dataGridViewLaps.Columns.Add("OverallTime", "Overall Time");
            dataGridViewLaps.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
            dataGridViewLaps.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
            dataGridViewLaps.Columns[2].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;

            dataGridViewLaps.MultiSelect = false;
            dataGridViewLaps.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None;
            dataGridViewLaps.AllowUserToResizeRows = false;
            
        }
        private void MainTimer_Tick(object sender, EventArgs e)
        {
            lblTime.Text = FormatTime(mainStopwatch.Elapsed);
        }

        private void SmallTimer_Tick(object sender, EventArgs e)
        {
            lblSmallTime.Text = FormatTime(smallStopwatch.Elapsed); // Update small stopwatch display  
        }
        private string FormatTime(TimeSpan timeSpan)
        {
            return string.Format("{0:00}:{1:00}:{2:00}.{3:00}",
                timeSpan.Hours,
                timeSpan.Minutes,
                timeSpan.Seconds,
                timeSpan.Milliseconds / 10);
        }

        private void btnStartStop_Click(object sender, EventArgs e)
        {
            if (mainStopwatch.IsRunning)
            {
                mainStopwatch.Stop();
                mainTimer.Stop();
                smallStopwatch.Stop();
                smallTimer.Stop();
                btnStartStop.Text = "Start";
            }
            else
            {
                mainStopwatch.Start();
                mainTimer.Start();
                smallStopwatch.Start();
                smallTimer.Start();
                btnStartStop.Text = "Stop";
            }
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            mainStopwatch.Reset();
            lblTime.Text = "00:00:00.00";
            dataGridViewLaps.Rows.Clear(); // Clear the DataGridView
            lapCount = 0; // Reset lap count  
            lblLapCount.Text = "Lap Count: 0"; // Update lap count display  
            btnStartStop.Text = "Start";
            mainTimer.Stop();
            lastLapTime = TimeSpan.Zero; // Reset last lap time  

            // Reset small stopwatch  
            smallStopwatch.Reset();
            lblSmallTime.Text = "00:00:00.00"; // Reset small stopwatch display  
            smallTimer.Stop(); // Stop small timer   
            lblSmallTime.Visible = false;
        }

        private void btnLap_Click(object sender, EventArgs e)
        {
            if (mainStopwatch.IsRunning)
            {
                lapCount++; // Increment lap count  
                TimeSpan currentLapTime = mainStopwatch.Elapsed - lastLapTime; // Calculate lap time  
                lastLapTime = mainStopwatch.Elapsed; // Update last lap time  
                string lapTime = FormatTime(currentLapTime); // Get the formatted lap time  
                string overallTime = FormatTime(mainStopwatch.Elapsed); // Get the overall time  

                // Add a new row to the DataGridView  
                dataGridViewLaps.Rows.Insert(0, lapCount, lapTime, overallTime);

                dataGridViewLaps.ClearSelection();

                lblLapCount.Text = $"Lap Count: {lapCount}"; // Update lap count display  

                // Reset and start the small stopwatch  
                smallStopwatch.Reset();
                smallStopwatch.Start();
                smallTimer.Start(); // Start small timer  
                lblSmallTime.Visible=true;
            }
        }
    }
}

4/05/2019

Python (Turtle Library)

Python Program (Turtle Library)

import turtle
t=turtle.Turtle()
s=turtle.Screen()
s.bgcolor('white')
t.pencolor('red')
t.speed(0) #change the speed value 
for i in range(45):
    t.circle(190-1,90)
    t.lt(98)
    t.circle(190-1,90)
    t.lt(18)

4/03/2019

Colorful Hexagon in python

import turtle
colors=["green","orange","red","blue","purple","yellow"]
t=turtle.pen()
turtle.bgcolor("black")
turtle.speed(0) 
for i in range(250):
    turtle.pencolor(colors[i%6])
    turtle.width(i//100+1)
    turtle.forward(i)
    turtle.left(59)

2/17/2019

List Drives using Command Prompt in Windows 10

Open command prompt in "Run as administrator" mode and then type the command "diskpart" and hit enter and in the next line type "list volume" and hit enter again to display all drives as shown in the following picture.