Vb Net Lab Programs For Bca Students Fix Fix

Private Sub btnCalc_Click(sender As Object, e As EventArgs) Handles btnCalc.Click Dim n1 As Double = Double.Parse(TextBox1.Text) Dim n2 As Double = Double.Parse(TextBox2.Text) Dim result As Double If rbAdd.Checked = True Then result = n1 + n2 ElseIf rbSub.Checked = True Then result = n1 - n2 ElseIf rbMul.Checked = True Then result = n1 * n2 ElseIf rbDiv.Checked = True Then If n2 <> 0 Then result = n1 / n2 Else MessageBox.Show("Cannot divide by zero") Exit Sub End If Else MessageBox.Show("Please select an operation") Exit Sub End If

student.Name = name student.Email = email student.PhoneNumber = phoneNumber student.Address = address

VB.NET (Visual Basic .NET) is an object-oriented programming language developed by Microsoft, widely used in BCA (Bachelor of Computer Applications) curricula to teach event-driven programming and GUI development Essential BCA Lab Programs List

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VB.NET remains a staple in many BCA curricula because it teaches the fundamentals of , Event-Driven Programming , and Database Connectivity (ADO.NET) in a relatively forgiving environment. However, "forgiving" does not mean "error-proof." vb net lab programs for bca students fix

Try ' Code that might fail Catch ex As Exception MessageBox.Show(ex.Message) End Try Use code with caution. Conclusion

' Using Parameters prevents SQL Injection cmd.Parameters.AddWithValue("@id", Integer.Parse(txtID.Text)) cmd.Parameters.AddWithValue("@name", txtName.Text) cmd.Parameters.AddWithValue("@course", txtCourse.Text)

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: Accepts numbers and performs addition, subtraction, multiplication, and division. Private Sub btnCalc_Click(sender As Object, e As EventArgs)

Public Class Form1 ' Change this connection string based on your SQL Server setup Dim conStr As String = "Data Source=.;Initial Catalog=StudentDB;Integrated Security=True" Dim con As New SqlConnection(conStr)

: Attempting to name the constructor function the same as the class (like in Java/C++). In VB.NET, constructors must always be named Sub New .

: Accept marks of five subjects (out of 100), calculate total, percentage, and assign a grade (A, B, C, D, F).

: Go to Compile settings and set Option Strict to ON . This forces you to fix implicit type conversions before running the code, preventing runtime crashes. Can’t copy the link right now

Public Class StudentManagementSystem Private students As List(Of Student) Private conn As SqlConnection

To accept a number and determine if it is prime.

Here are the core programs usually covered in a BCA semester, ranging from basic console applications to GUI-based Database connectivity. 1. Basic Console Application: Factorial Calculation Understand loops, user input, and basic data types.