lblResult.Text = "Result: " & result.ToString() End Sub End Class

: A database-driven application to Insert, Update, Delete, and View student records.

Note: StrReverse is a built-in VB.NET function. In other .NET languages, you might use Array.Reverse .

: Design a form to convert local currency (e.g., INR) to USD or EUR.

Use modern auto-implemented Public Property syntax, or explicitly mark variables as Protected or Public . 5. Database Connectivity Program (ADO.NET / MS Access)

Imports System.Data.OleDb Public Class EmployeeForm ' Define the connection string (Modify database path as per your lab environment) Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=CompanyDB.accdb;" Dim conn As OleDbConnection Private Sub EmployeeForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load conn = New OleDbConnection(connString) LoadDataGrid() End Sub Private Sub LoadDataGrid() Try Using cmd As New OleDbCommand("SELECT * FROM Employee", conn) Dim da As New OleDbDataAdapter(cmd) Dim dt As New DataTable() da.Fill(dt) DataGridView1.DataSource = dt End Using Catch ex As Exception MessageBox.Show("Database Load Error: " & ex.Message) End Try End Sub Private Sub btnInsert_Click(sender As Object, e As EventArgs) Handles btnInsert.Click Dim query As String = "INSERT INTO Employee (EmpID, EmpName, Designation) VALUES (?, ?, ?)" Using cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@id", txtID.Text) cmd.Parameters.AddWithValue("@name", txtName.Text) cmd.Parameters.AddWithValue("@desig", txtDesignation.Text) Try conn.Open() cmd.ExecuteNonQuery() MessageBox.Show("Record inserted successfully!") Catch ex As Exception MessageBox.Show("Execution Error: " & ex.Message) Finally conn.Close() End Try End Using LoadDataGrid() End Sub Private Sub btnDelete_Click(sender As Object, e As EventArgs) Handles btnDelete.Click Dim query As String = "DELETE FROM Employee WHERE EmpID = ?" Using cmd As New OleDbCommand(query, conn) cmd.Parameters.AddWithValue("@id", txtID.Text) Try conn.Open() Dim rowsAffected As Integer = cmd.ExecuteNonQuery() If rowsAffected > 0 Then MessageBox.Show("Record deleted successfully.") Else MessageBox.Show("No record found with that ID.") End If Catch ex As Exception MessageBox.Show("Execution Error: " & ex.Message) Finally conn.Close() End Try End Using LoadDataGrid() End Sub End Class Use code with caution.

: Compares three numbers entered in textboxes to find the maximum.

Do While True Console.WriteLine("Student Management System") Console.WriteLine("1. Add Student") Console.WriteLine("2. Edit Student") Console.WriteLine("3. Delete Student") Console.WriteLine("4. Display Students") Console.WriteLine("5. Exit")

Implement a program that accepts a string input from the user and performs operations including string reversal, checking for palindromes, and counting the occurrences of vowels. Fixed Code Solution

: Uses a Timer control to make an image or label text blink at set intervals.

This structure prevents your entire application from crashing and allows you to inform the user (or your lab professor) about the issue gracefully.

Develop a Windows Form program that connects to an MS Access or SQL Server database to insert record entries and display them in a DataGridView . Solution Architecture (SQL Server Connection)

Always wrap database and file operations in a Try-Catch block to prevent the app from crashing on errors (e.g., File Not Found).

Public Property Email As String Get Return email End Get Set(value As String) email = value End Set End Property

Before diving into solutions, it's helpful to recognize the three primary types of errors you'll encounter.