Pass data from mainwindow > tabitem > scroller > frame > content - wpf

Question

I asked this question already but now I have a better understanding of what I'm trying to do. I have a WPF application with a mainwindow class. From there, tabitems can be created. For example, I have an account tab. My problem is that I want to use the account.xaml for the "edit account' and the "add account" button. How can I tell account.xaml.vb whether it is in edit mode or add mode? Similarly - how do I tell account.vb which account it is editing from a dialogue box that I show when "edit account" is clicked?
Here is the tab being created in mainwindow.xaml.vb
Private Sub btn_AddAccount_Click(sender As Object, e As
RoutedEventArgs) Handles btn_AddAccount.Click
Dim tab_NewAccount As New C1TabItem()
Dim frame_NewAccount As New Frame()
Dim scroller_NewAccount As New ScrollViewer()
Dim str_Name As String = "Add Account"
Dim str_NavigationLink As String = "PM_AddAccount.xaml"
Dim account As New PM_AddAccount
account.mode = 1
'Add and name new tab
tab_NewAccount.Header = tabcontrol.Items.Count + 1 & ". " & str_Name
tab_NewAccount.CanUserClose = True
tabcontrol.Items.Add(tab_NewAccount)
'Add frame to the tab and include new page
With frame_NewAccount
.NavigationService.Navigate(New Uri(str_NavigationLink, UriKind.Relative))
.HorizontalAlignment = HorizontalAlignment.Stretch
.VerticalAlignment = VerticalAlignment.Top
.Margin = New Thickness(0, 0, 0, 0)
End With
With scroller_NewAccount
.CanContentScroll = vbTrue
.VerticalScrollBarVisibility = ScrollBarVisibility.Auto
.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto
.Content = frame_NewAccount
End With
tab_NewAccount.Content = scroller_NewAccount
' Set new tab as active tab
tabcontrol.SelectedIndex = tabcontrol.Items.IndexOf(TAB)
End Sub
Edit:
So I tried giving Account.xaml.vb a public property and then setting that in mainwindow.xaml.vb However, the value isn't getting set - I realize that the account variable in mainwindow.xaml.vb isn't connected anything but frame.content = account doesnt work either.
Class Account
Public Property mode As AccountMode
Get
Return mode
End Get
Set(value As AccountMode)
value = mode
End Set
End Property
Public Enum AccountMode
None = 0
Add = 1
Edit = 2
End Enum
End Class

Answer 1

Define an enum called AccountMode
Public Enum AccountMode
None = 0
Add = 1
Edit = 0
End Enum
Add a property to account.xaml.vb called Mode And set it appropriately as needed.
In regard to how to tell it which account it is editing, that question is vague. Typically you would be binding your control to a data source and that data source will have some kind of key or identifier that makes it unique from all other records. For example, if you are binding your data from a database there would be a Primary Key and/or Identity Field.
Your data would be bound to a model class like this:
Public Class Account
[Key]
Public Property Id As Integer
Public Property FirstName As String
Public Property LastName As String
End Class
Likewise, Instead of have a mode in your Account class you could incorporate logic that detects you are adding a new Account if the Account.Id = 0. Otherwise if Account.Id>0 then you are editing an existing account.