How to make a combo box password - vb.net

Question

How do I make a combo box password or button password? I got this code and it does not work.
Public Class Form1
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
If ComboBox1.Text = "5" Then
If ComboBox2.Text = "3" Then
If ComboBox3.Text = "2" Then
If ComboBox4.Text = "6" Then
Button1.Enabled = True
End If
End If
End If
End If
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
MsgBox("Dony", MsgBoxStyle.Information, "Dony")
Application.Exit()
End Sub
When combo box's item is 5, then it will allow the other combo box to be 3 and if the second combo box is 3 it will allow the third combo box to be 6 and if that happens it will allow the fourth combo box to be 2 and then if that happens the button is enabled.
Anyone help?

Answer 1

Your function run only when you change the selected index in your ComboBox1. Button1 will only be enabled if you choose your value for Combobox1 after you have selected all the good values for the others ComboBoxes. You should put this code in another function that you can call every time you select a value in one of your four ComboBoxes.

Answer 2

First of all: your code will only be executed after the first Combobox get changed. So it will only check the second, the third and the fourth position AFTER the first ComboBox get changed.
The solution for your problem is to add the other ComboBoxes as a Handler for your function. Also you listen to the wrong event. SelectedIndexChanged only get triggered if the user choose another answer from the list. But what if the user typed in the code? The correct event is the TextChanged event which also trigger the function if the user type in the code.
Private Sub CheckCode(sender As Object, e As EventArgs) Handles ComboBox1.TextChanged, ComboBox2.TextChanged, ComboBox3.TextChanged, ComboBox4.TextChanged
If ComboBox1.Text = "5" Then
If ComboBox2.Text = "3" Then
If ComboBox3.Text = "2" Then
If ComboBox4.Text = "6" Then
Button1.Enabled = True
End If
End If
End If
End If
End Sub
Personally, I would not handle it that way, but it definitely solves your problem.

Answer 3

i solved the problem.
The code is
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If NumericUpDown1.Value = 5 And NumericUpDown2.Value = 3 And NumericUpDown3.Value = 2 And NumericUpDown4.Value = 6 Then
Me.Close() 'Command here.
End If
End Sub
If Anyone wants to know.

Answer 4

You must have a code in other comboboxes, not only on the first one.
your code must be like this:
if combobox1.text = 5 and combobox2.text = 3 and combobox3.text = 2 and combobox4.text = 6 then
button1.enabled = true
else
button1.enabled = false
endif
all of the comboboxes has the same code, i think. just try it :)