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我有以下實體結構。我有幾個裝飾,將填充Invoice.InvoiceLines,並在結束時,我想OrderReference使用linq按深度級/實體字段按集合排序
public class Invoice
{
private readonly IList<InvoiceLine> _invoiceLines;
public virtual IList<InvoiceLine> InvoiceLines => _invoiceLines;
public Invoice()
{
_invoiceLines = new List<InvoiceLine>();
}
}
public class InvoiceLine
{
private readonly IList<TransactionLine> _transactionLines = new List<TransactionLine>();
public virtual IReadOnlyCollection<TransactionLine> TransactionLines => new ReadOnlyCollection<TransactionLine>(_transactionLines);
public virtual void AddTransactionLine(TransactionLine transactionLine)
{
transactionLine.ThrowIfNull(nameof(transactionLine), "can't be null");
_transactionLines.Add(transactionLine);
}
}
public class PermanentPlacementTransactionLine : TransactionLine
{
public PermanentPlacement PermanentPlacement { get; set; }
}
public class PermanentPlacement
{
public virtual string JobReference { get; set; }
public virtual string OrderReference { get; set; }
}
我想要做的是OrderReference訂單發票行命令實施invoicelines。
foreach (var invoice in DecoratedResult.Invoices.Where(inv => inv.InvoiceType == InvoiceType.Weekly))
{
var customer = CustomerRepository.FetchByAccountNumber(invoice.CustomerAccountNumber);
if (customer.InvoiceProperties.InvoiceSequence == InvoiceSequence.OrderReference)
{
// order by fields at deep level.
// invoice.InvoiceLines.OrderBy(i => i.TransactionLines.OfType<PermanentPlacementTransactionLine>());
}
}
我可以公開屬性,以invoiceline,然後進行相應的設置,但有什麼辦法,我可以使用LINQ做到這一點。
看看https://code.msdn.microsoft.com/101-LINQ-Samples-3fb9811b,你會發現一個排序依據的方法。 –
問題是,無論何時向列表中添加新項目,都希望它們在最後進行,因此列表會停止排序?如果是這樣'SortedList'(https://msdn.microsoft.com/en-us/library/system.collections.sortedlist(v=vs.110).aspx)可能會對你感興趣。否則,我有點不確定你的問題在哪裏。 – Chris
我注意到它看起來只有一些'TransactionLine'對象(那些類型爲'PermanentPlacementTransactionLine')的對象上有OrderReference。你想用其他類型的TransactionLine做什麼?你需要更好地指定這個... – Chris