Design time support for instance properties

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  14 years ago

  by Andre_351

  Andre

  , Australia

  Joined 14 years ago

  Hi All

  Im new to VB.net and .net development

  How do I access any properties of a an Instance of a form, from another form or child form.

  1: At design time

  2: At runtime

  eg If I attempt to code the following

  me.parent.GETCURRENTREFNUM where GETCURRENTREFNUM is a property of an parent instance of another form ...it wont work as I cannot code for GETCURRENTREFNUM at design time

  HTMS

  VB2005, XP

  many Thanks

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  14 years ago

  by TwoFaced

  Thomas Reynard

  , United States

  Joined 15 years ago
  You'll need a reference to whatever form you want to access.  If you need form1 to create form2 and form2 should access properties on form1 then you might try passing form1 in the constructor.  Here is some code that demonstates this.

  Public Class Form2
      Private _parent As Form1
  
      'Accepts Form1
      Public Sub New(ByVal parent As Form1)
          InitializeComponent()
  
          'Sets parent
          _parent = parent
      End Sub
  
      Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
          'Displays the text of the parent
          MsgBox(_parent.Text)
      End Sub
  End Class

  This is what form1's code might look like.

  Public Class Form1
      Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
         'Create instance of form2 and pass a reference to this form
          Dim frm As New Form2(Me)
          frm.Show()
      End Sub
  End Class

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  14 years ago

  by Andre_351

  Andre

  , Australia

  Joined 14 years ago

  Thank you for that.

  Unfortunatly this does not expose  my methods and properties on Form1 to Form2 at design time.

  Once again thanks

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• • Reply

  14 years ago

  by TwoFaced

  Thomas Reynard

  , United States

  Joined 15 years ago
  It will if they are declared public.  If you still can't get it working try posting some relevent code.  Maybe we can figure out what's going on.  Also just to make sure try creating an instance of form1 and see if you properties and methods show up.  If they are public they'll be there.
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