Vb Net Lab Programs For Bca Students Fix May 2026

Try conn.Open() Dim rowsAffected As Integer = cmd.ExecuteNonQuery() If rowsAffected > 0 Then MessageBox.Show("Record inserted successfully!", "Success") ' Clear form or reload data grid End If Catch ex As Exception MessageBox.Show("Error: " & ex.Message, "Database Error") Finally If conn.State = ConnectionState.Open Then conn.Close() cmd.Dispose() conn.Dispose() End Try End Sub

' Step 2: SQL Query (Use Parameters to avoid SQL Injection and quote errors) Dim query As String = "INSERT INTO Students ([Name], [Age], [Course]) VALUES (?, ?, ?)" Dim cmd As New OleDbCommand(query, conn) vb net lab programs for bca students fix

If marks >= 90 Then Grade = "A" ElseIf marks >= 80 AndAlso marks < 90 Then Grade = "B" ElseIf marks >= 70 Then Grade = "C" Else Grade = "F" End If Common Problem: The array outputs in the same order as input. Try conn

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." 0 Then MessageBox.Show("Record inserted successfully!"

ByVal sends a copy ; ByRef sends the memory address . 3. Program: Palindrome Checker (String & Integer) Common Problem: "Madam" returns false, but "radar" returns true. Case sensitivity fails.