vb.net - 使用 Linq 返回不同的对象
问题描述
(我是 VB.Net 的新手)我有这三个类:
Public Class Classe_PIVA_Cond
Public Property my_codFiscale As String
Public Property my_presenzaDuplicati As Boolean
Public Property my_listaCondominii As New List(Of Classe_Condominio)
Public Sub New()
End Sub
Public Sub New(codFiscale As String, presenzaDuplicati As Boolean, listaCondominii As List(Of Classe_Condominio))
Me.my_codFiscale = codFiscale
Me.my_presenzaDuplicati = presenzaDuplicati
Me.my_listaCondominii = listaCondominii
End Sub
End Class
'===================================
Public Class Classe_Condominio
Public Property my_Studio As New Classe_Studio
Public Property my_Amministratore As New Classe_Amministratore
Public Property my_codCondominio As String
Public Property my_indirizzo As String
Public Property my_comune As String
Public Property my_cap As String
Public Property my_provincia As String
Public Property my_codFiscale As String
Public Sub New()
End Sub
Public Sub New(studio As Classe_Studio, amministratore As Classe_Amministratore, codCondominio As String, indirizzo As String, comune As String, cap As String, provincia As String, codFiscale As String)
Me.my_Studio = studio
Me.my_Amministratore = amministratore
Me.my_codCondominio = codCondominio
Me.my_indirizzo = indirizzo
Me.my_comune = comune
Me.my_cap = cap
Me.my_provincia = provincia
Me.my_codFiscale = codFiscale
End Sub
End Class
'===================================
Public Class Classe_Studio
Public Property my_codice As String
Public Property my_ragioneSociale As String
Public Property my_pIvaCodFisc As String
Public Sub New()
End Sub
Public Sub New(codice As String, ragioneSociale As String, pIvaCodFisc As String)
Me.my_codice = codice
Me.my_ragioneSociale = ragioneSociale
Me.my_pIvaCodFisc = pIvaCodFisc
End Sub
End Clas
我会尝试在 List(Of Classe_PIVA_Cond) 中返回不同 Classe_Studio.my_codice 的列表。有什么建议吗?
解决方案
尝试
Dim my_codiceDistinctList = Classe_PIVA_CondList
.SelectMany(Function(x) x.my_listaCondominii)
.Select(Function(y) y.my_Studio.my_codice)
.Distinct()
.ToList()
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