[SOLVED] DevExpress TreeList not displaying child nodes and displaying as root nodes instead

DevExpress TreeList not displaying child nodes and displaying as root nodes instead

I have a TreeList reading from a List(Of LedgerAccountEntry)().

Public Class LedgerAccountEntry
    Public Property LedgerAccountSys() As Integer 
    Public ParentLedgerAccountSys As Integer
    '
    '
    ' ETC
End Class

In form load:

tlLedgerAccounts.ParentFieldName = "ParentLedgerAccountSys"
tlLedgerAccounts.KeyFieldName = "LedgerAccountSys"
tlLedgerAccounts.RootValue = -1

Later on:

While bla
    entry.LedgerAccountSys = rstAccounts("LedgerAccountSys").Value
    entry.ParentLedgerAccountSys = IIf(rstAccounts("ParentLedgerAccountSys").Value Is DBNull.Value, -1, rstAccounts("ParentLedgerAccountSys").Value)
    lst.add(entry)
End While            
tlLedgerAccounts.DataSource = lst

These are just the relevant parts. Please let me know if you need more info.

The result is flat tree with no child nodes, I checked that the IDs exists and are being returned correctly.

Solution

This is because you are using ParentLedgerAccountSys as field. You need to convert your ParentLedgerAccountSys to property or add another property which represents your ParentLedgerAccountSys field.
Here is example:

Public Class LedgerAccountEntry
    Public Property LedgerAccountSys As Integer
    'Public ParentLedgerAccountSys As Integer <-- Here is field.
    Public Property ParentLedgerAccountSys As Integer '<-- Here is property instead of field.
    '
    '
    ' ETC
End Class