DevExpress TreeList 不显示子节点而是显示为根节点

Question

我有 TreeList 读数来自 List(Of LedgerAccountEntry)()。

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

表单加载中：

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

稍后：

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

这些只是相关部分。如果您需要更多信息，请告诉我。

结果是没有子节点的平面树，我检查了 ID 存在并且正在正确返回。

Answer 1

这是因为您正在使用 ParentLedgerAccountSys 作为字段。您需要将 ParentLedgerAccountSys 转换为属性或添加另一个属性代表您的 ParentLedgerAccountSys 字段。
这是示例：

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

DevExpress TreeList 不显示子节点而是显示为根节点

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

vb.net

devexpress

xtratreelist

winforms

treelist