Newbie: OO Help, passing values between forms.

[robtyketto]

Greetings,

My scenerio is a form with a button, when clicked opens a form dialog.
The dialog allows the user to enter a text box.

I want to read the value of the text box from the main form into a variable to be used with an SQL statement.

The following code is used to create a new instance of the form dialog if one does not exist:-

If transferdialog Is Nothing Then
       transferdialog = New dlgTransfers(txtMemNum.Text.ToString)
Else
       transferdialog.Show()
End If

Code below is the dialog box class and public values which I believe should be accessable to any other class (other forms).

Public Class dlgTransfers

Private cTransferLocation As String

Public Sub New(ByVal memNum As String)

        ' This call is required by the Windows Form Designer.
        InitializeComponent()

        lblTransferMemNum.Text += " " + frmAddMembers.txtMemNum.Text

End Sub

Public Property TransferLocation() As String

        Get
            Return cTransferLocation
        End Get

        Set(ByVal value As String)
            cTransferLocation = value
        End Set

End Property

End Class

Setting the value of the private variable, will this inturn update the publc variable TransferLocation?

Private Sub dlgTransfers_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing

        Me.cTransferLocation = txtBranch.Text.ToString

End Sub

I then believed I could access the variable as follows:-

<classname>.<public variable>

So if transferdialog Is NOT Nothing then I could use the following code:

Dim passedTransferLocation as string = Me.transferdialog.TransferLocation

However this errors as it appears to recognise as a window form class as it has been dimensioned and not transferdialog class with an available public variable.

I know there is several ways to pass values between forms, can anyone point me in the right direction of how to access values via properties i.e what im trying to do?

I've also started to read about shared variables too, so if there is a strong reason not to use the method I've tried to implement Im all ears.

Thanks and hope the problem is clear.
Rob

 

[MattP]

There are several ways to do this. Here are a couple of examples to get you started.

WinForms-FormToForm Using Properties

FormToForm Using Parameters

 

[robtyketto]

Think I've now resolved my issue
Thanks for the links.