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Multiple links pointing to the same string?

Is the following simplification possible in VB.NET?

Example: a variable text

pointing to another line:

Class Form1
    Sub New()
        Dim text As (what_type?) = AddressOf TextBox1.Text  'simplification
        If text = "foo" Then text = "bar"  'actually accessing TextBox1.Text
    End Sub
End Class

I think this is not possible, but I could be wrong.

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2 answers


VB.NET has no pointers. You can use properties :

Public Property Text As String
    Get
        Return TextBox1.Text
    End Get
    Set(value As String)
        TextBox1.Text = value
    End Set
End Property

You can use properties as a layer so that you don't expose the control itself, just the relevant information:

If Text = "foo" Then Text = "bar"


This way you can even change the control (fe before Label

) without breaking your code.

Another approach uses a lambda expression :

Dim setText = Sub(str As String) TextBox1.Text = str
setText("test")
Dim getText = Function() TextBox1.Text
Dim text As String = getText()
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In the local area:



Using a locally declared function and procedure (any of them are optional):

Public Class Form1
    Sub New()

        Dim text As Func(Of String) = Function() TextBox1.Text
        Dim setText As Action(Of String) = Sub(value) TextBox1.Text = value

        If text() = "foo" Then setText("bar")

    End Sub
End Class
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