How can i disable space in visual basic and how i can only put one hypen

Question

I already have my codes but its not complete yet here it is
If txtstudentnumber.text.contains("-") then
If Char.IsDigit(e.KeyChar) or e.KeyChar = Chr (8) then
e.Handled = True
Else
e.Handled = False
End If
End If

Answer 1

I don't have a computer at home to check the code it could be like this.
If Not Char. IsDigit(e. KeyChar) OrElse Not Char. Is Control(e. KeyChar) OrElse Not( e. KeyChar =chrW(8)) Then
e. Handled = True
End If

Answer 2

What are you trying to do?

Answer 3

im trying to make my textbox input only numbers and only 1 hypen

Answer 4

If Not Char. IsDigit(e. KeyChar) OrElse Not Char. Is Control(e. KeyChar) Then
e. Handled = True
End If
This is to input only numbers in text box.
Where you want to put your hifen?

Answer 5

numbers with only one hypen like for example a school id number 12-3271 like that

Answer 6

thanks