Vb Net Lab Programs For Bca Students Fix May 2026

Check if you have an infinite Do...While loop without an Application.DoEvents() .

This program focuses on basic controls like TextBoxes, Labels, and Buttons. vb net lab programs for bca students fix

Public Class Form1 Private Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.Click Try Dim num1 As Double = Val(txtFirst.Text) Dim num2 As Double = Val(txtSecond.Text) lblResult.Text = "Result: " & (num1 + num2).ToString() Catch ex As Exception MessageBox.Show("Please enter valid numbers.") End Try End Sub End Class Use code with caution. Check if you have an infinite Do

Use Val() or Double.TryParse() to avoid "Conversion from string to type Double is not valid" errors when a user leaves a textbox empty. 2. Simple Interest Calculator Use Val() or Double

Private Sub NumberButtons_Click(sender As Object, e As EventArgs) Handles btn1.Click, btn2.Click, btn3.Click Dim b As Button = DirectCast(sender, Button) txtDisplay.Text &= b.Text End Sub Use code with caution. Troubleshooting Tips for Lab Exams