 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
using static System.Windows.Forms.VisualStyles.VisualStyleElement;

namespace OrganizationProfile
{
    public partial class frmRegistration : Form
    {
        private string _FullName;
        private int _Age;
        private long _StudentNo;
        private long _ContactNo;

        public frmRegistration()
        {
            InitializeComponent();
        }



        private void frmRegistration_Load(object sender, EventArgs e)
{
    string[] ListOfProgram = new string[]{
        "BS Information Technology",
        "BS Computer Science",
        "BS Information Systems",
        "BS in Accountancy",
        "BS in Hospitality Management",
        "BS in Tourism Management"
    };
        string[] ListOfGender = new string[]{
        "Male",   "Female",  "Other"  };

    for (int i = 0; i < ListOfProgram.Length; i++)
    {
        try
        {
            if (! string.IsNullOrWhiteSpace(ListOfProgram[i]))
            {
                cbProgram.Items.Add(ListOfProgram[i]);
            }
            else
            {
                MessageBox.Show("Item at index " + i + " is null or whitespace.");
            }
        }
        catch (IndexOutOfRangeException ex)
        {
            MessageBox.Show($"An error occurred: {ex.Message}");
        }
    }
        for (int i = 0; i < ListOfGender.Length; i++)
    {
        try
        {
            if (!string.IsNullOrWhiteSpace(ListOfGender[i]))
            {
                cbGender.Items.Add(ListOfGender[i]);
            }
            else
            {
                MessageBox.Show("Gender item at index " + i + " is null or whitespace.");
            }
        }
        catch (IndexOutOfRangeException ex)
        {
            MessageBox.Show($"An error occurred while adding Gender: {ex.Message}");
        }
    }
}
}

        public long StudentNumber(string studNum)
{
    try
    {
        if (string.IsNullOrEmpty(studNum))
        {
            throw new ArgumentNullException("Student Number cannot be empty");
        }

        if (!long.TryParse(studNum, out _StudentNo))
        {
            throw new FormatException("Invalid Student Number Input");
        }

        if (_StudentNo < 1000000000 || _StudentNo > 9999999999)
        {
            throw new OverflowException("Student Number is out of valid range.");
        }
    }
    catch (FormatException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (OverflowException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (ArgumentNullException ex)
    {
        MessageBox.Show(ex.Message);
    }

    return _StudentNo;
}

public long ContactNo(string Contact)
{
    try
    {
        if (string.IsNullOrEmpty(Contact))
        {
            throw new ArgumentNullException("Contact Number cannot be empty");
        }

        if (Regex.IsMatch(Contact, @"^[0-9]{10,11}$"))
        {
            _ContactNo = long.Parse(Contact);
        }
        else
        {
            throw new FormatException("Invalid Contact Number Input");
        }

        if (_ContactNo < 1000000000 || _ContactNo > 99999999999)
        {
            throw new OverflowException("Contact Number is out of valid range.");
        }
    }
    catch (FormatException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (OverflowException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (ArgumentNullException ex)
    {
        MessageBox.Show(ex.Message);
    }

    return _ContactNo;
}
public string FullName(string LastName, string FirstName, string MiddleInitial)
{
    try
    {
        if (string.IsNullOrWhiteSpace(LastName) || string.IsNullOrWhiteSpace(FirstName) || string.IsNullOrWhiteSpace(MiddleInitial))
        {
            throw new ArgumentNullException();
        }
        if (Regex.IsMatch(LastName, @"^[a-zA-Z]+$") && Regex.IsMatch(FirstName, @"^[a-zA-Z]+$") && Regex.IsMatch(MiddleInitial, @"^[a-zA-Z]+$"))
        {
            _FullName = LastName + ", " + FirstName + ", " + MiddleInitial;
        }
        else
        {
            throw new FormatException();
        }
    }
    catch (FormatException)
    {
        MessageBox.Show("Invalid First Name and Last Name Input");
    }
    catch (ArgumentNullException)
    {
        MessageBox.Show("Empty Input");
    }
    return _FullName;
}
public int Age(string age)
{
    try
    {
        if (string.IsNullOrEmpty(age))
        {
            throw new ArgumentNullException("Age cannot be empty");
        }

        if (Regex.IsMatch(age, @"^[0-9]{1,3}$"))
        {
           _Age = Int32.Parse(age) ;
      } 
        else { 
            throw new FormatException("Invalid Age Input");
        }

        if (_Age < 1 || _Age > 999)
        {
            throw new OverflowException("Age is out of valid range.");
        }
    }
    catch (FormatException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (OverflowException ex)
    {
        MessageBox.Show(ex.Message);
    }
    catch (ArgumentNullException ex)
    {
        MessageBox.Show(ex.Message);
    }

    return _Age;
}



        private void btnRegister_Click(object sender, EventArgs e)
        {
            var frmConfirmation = new frmComfirmation();
            frmConfirmation.Show();

            StudentInformationClass.SetFullName = FullName(txtLastName.Text,
            txtFirstName.Text, txtMiddleInitial.Text);
            StudentInformationClass.SetStudentNo = StudentNumber(txtStudentNo.Text);
            StudentInformationClass.SetProgram = cbProgram.Text;
            StudentInformationClass.SetGender = cbGender.Text;
            StudentInformationClass.SetContactNo = ContactNo(txtContactNo.Text);
            StudentInformationClass.SetAge = Age(txtAge.Text);
            StudentInformationClass.SetBirthDay = datePickerBirthday.Value.ToString("yyyyMM-dd");
            frmConfirm frm = new frmConfirm();
            frm.ShowDialog();
        }
    }
}

created 1 year ago

C Sharp Online Compiler

Write, Run & Share C# code online using OneCompiler's C# online compiler for free. It's one of the robust, feature-rich online compilers for C# language, running on the latest version 8.0. Getting started with the OneCompiler's C# compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C# and start coding.

Read inputs from stdin

OneCompiler's C# online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

using System;
 
namespace Sample
{
  class Test
    {
      public static void Main(string[] args)
       {
         string name;
         name = Console.ReadLine();
         Console.WriteLine("Hello {0} ", name);
	}
     }
}

About C Sharp

C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.

You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.

Syntax help

Data types

Data Type	Description	Range	size
int	To store integers	-2,147,483,648 to 2,147,483,647	4 bytes
double	to store large floating point numbers with decimals	can store 15 decimal digits	8 bytes
float	to store floating point numbers with decimals	can store upto 7 decimal digits	4 bytes
char	to store single characters	-	2 bytes
string	to stores text	-	2 bytes per character
bool	to stores either true or false	-	1 bit

Variables

Syntax

datatype variable-name = value;

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.

if(conditional-expression) {
   // code
} 
else {
   // code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement) {
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

data-type[] array-name;

Methods

Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.

Syntax

static void method-name() 
{
  // code to be executed
}