Write a Vb.net program to design the following form, accept the numbers through textbox and add them into the ListBoxe1 by clicking on Add button. When user click on Prime button then all the prime numbers from ListBox1 should get added into ListBox2.
Form:-
Program:-
Public Class slip12
' Add button
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
ListBox1.Items.Add(CInt(TextBox1.Text))
TextBox1.Text = ""
TextBox1.Focus()
End Sub
' Prime Button
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Dim n, i, mm, count, contain As Integer
For i = 0 To ListBox1.Items.Count() - 1
n = ListBox1.Items.Item(i)
count = CInt(n) / 2
mm = 1
For j As Integer = 2 To count
If n Mod j = 0 Then
mm = 0
End If
Next
If mm = 1 Then
ListBox2.Items.Add(CInt(n))
End If
Next
contain = ListBox1.Items.Count() - 1 ' 4
i = 0
While True
If contain >= i Then
n = ListBox1.Items.Item(i)
count = CInt(n) / 2
mm = 1
For j As Integer = 2 To count
If n Mod j = 0 Then
mm = 0
End If
Next
If mm = 1 Then
ListBox1.Items.RemoveAt(i)
Else
i = i + 1
End If
contain = ListBox1.Items.Count() - 1
Else
Exit While
End If
End While
End Sub
End Class
Output:-
1) Take a Label, Textbox, 2 Listboxes, 2 Buttons on design form.
2) Set text on labels and buttons.
Note - Set startup form's application type as Windows Form Application
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