Gewusst wie: Sortieren von Elementen nach mehreren Schlüsseln
Aktualisiert: November 2007
In diesem Thema wird das Sortieren nach mehreren Schlüsseln gezeigt.
Beispiel
Die Ergebnisse in diesem Beispiel werden zunächst nach der Postleitzahl des Versandziels und dann nach dem Auftragsdatum geordnet.
In diesem Beispiel wird das XML-Dokument XML-Beispieldatei: Kunden ('Customers') und Aufträge ('Orders') (LINQ to XML) verwendet.
XElement co = XElement.Load("CustomersOrders.xml");
var sortedElements =
from c in co.Element("Orders").Elements("Order")
orderby (string)c.Element("ShipInfo").Element("ShipPostalCode"),
(DateTime)c.Element("OrderDate")
select new {
CustomerID = (string)c.Element("CustomerID"),
EmployeeID = (string)c.Element("EmployeeID"),
ShipPostalCode = (string)c.Element("ShipInfo").Element("ShipPostalCode"),
OrderDate = (DateTime)c.Element("OrderDate")
};
foreach (var r in sortedElements)
Console.WriteLine("CustomerID:{0} EmployeeID:{1} ShipPostalCode:{2} OrderDate:{3:d}",
r.CustomerID, r.EmployeeID, r.ShipPostalCode, r.OrderDate);
Dim co As XElement = XElement.Load("CustomersOrders.xml")
Dim result = _
From c In co.<Orders>.<Order> _
Order By c.<ShipInfo>.<ShipPostalCode>.Value, Convert.ToDateTime(c.<OrderDate>.Value) _
Select New With { _
.CustomerID = c.<CustomerID>.Value, _
.EmployeeID = c.<EmployeeID>.Value, _
.ShipPostalCode = c.<ShipInfo>.<ShipPostalCode>.Value, _
.OrderDate = Convert.ToDateTime(c.<OrderDate>.Value) _
}
For Each r In result
Console.WriteLine("CustomerID:{0} EmployeeID:{1} ShipPostalCode:{2} OrderDate:{3:d}", _
r.CustomerID, r.EmployeeID, r.ShipPostalCode, r.OrderDate)
Next
Dieser Code erzeugt die folgende Ausgabe:
CustomerID:LETSS EmployeeID:1 ShipPostalCode:94117 OrderDate:6/25/1997
CustomerID:LETSS EmployeeID:8 ShipPostalCode:94117 OrderDate:10/27/1997
CustomerID:LETSS EmployeeID:6 ShipPostalCode:94117 OrderDate:11/10/1997
CustomerID:LETSS EmployeeID:4 ShipPostalCode:94117 OrderDate:2/12/1998
CustomerID:GREAL EmployeeID:6 ShipPostalCode:97403 OrderDate:5/6/1997
CustomerID:GREAL EmployeeID:8 ShipPostalCode:97403 OrderDate:7/4/1997
CustomerID:GREAL EmployeeID:1 ShipPostalCode:97403 OrderDate:7/31/1997
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:7/31/1997
CustomerID:GREAL EmployeeID:6 ShipPostalCode:97403 OrderDate:9/4/1997
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:9/25/1997
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:1/6/1998
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:3/9/1998
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:4/7/1998
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:4/22/1998
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:4/30/1998
CustomerID:HUNGC EmployeeID:3 ShipPostalCode:97827 OrderDate:12/6/1996
CustomerID:HUNGC EmployeeID:1 ShipPostalCode:97827 OrderDate:12/25/1996
CustomerID:HUNGC EmployeeID:3 ShipPostalCode:97827 OrderDate:1/15/1997
CustomerID:HUNGC EmployeeID:4 ShipPostalCode:97827 OrderDate:7/16/1997
CustomerID:HUNGC EmployeeID:8 ShipPostalCode:97827 OrderDate:9/8/1997
CustomerID:LAZYK EmployeeID:1 ShipPostalCode:99362 OrderDate:3/21/1997
CustomerID:LAZYK EmployeeID:8 ShipPostalCode:99362 OrderDate:5/22/1997
Im folgenden Beispiel wird dieselbe Abfrage für XML in einem Namespace gezeigt. Weitere Informationen dazu finden Sie unter Arbeiten mit XML-Namespaces.
In diesem Beispiel wird das XML-Dokument XML-Beispieldatei: Kunden ('Customers') und Aufträge ('Orders') in einem Namespace verwendet.
XElement co = XElement.Load("CustomersOrdersInNamespace.xml");
XNamespace aw = "https://www.adventure-works.com";
var sortedElements =
from c in co.Element(aw + "Orders").Elements(aw + "Order")
orderby (string)c.Element(aw + "ShipInfo").Element(aw + "ShipPostalCode"),
(DateTime)c.Element(aw + "OrderDate")
select new
{
CustomerID = (string)c.Element(aw + "CustomerID"),
EmployeeID = (string)c.Element(aw + "EmployeeID"),
ShipPostalCode = (string)c.Element(aw + "ShipInfo").Element(aw + "ShipPostalCode"),
OrderDate = (DateTime)c.Element(aw + "OrderDate")
};
foreach (var r in sortedElements)
Console.WriteLine("CustomerID:{0} EmployeeID:{1} ShipPostalCode:{2} OrderDate:{3:d}",
r.CustomerID, r.EmployeeID, r.ShipPostalCode, r.OrderDate);
Imports <xmlns='https://www.adventure-works.com'>
Module Module1
Sub Main()
Dim co As XElement = XElement.Load("CustomersOrdersInNamespace.xml")
Dim result = _
From c In co.<Orders>.<Order> _
Order By c.<ShipInfo>.<ShipPostalCode>.Value, Convert.ToDateTime(c.<OrderDate>.Value) _
Select New With { _
.CustomerID = c.<CustomerID>.Value, _
.EmployeeID = c.<EmployeeID>.Value, _
.ShipPostalCode = c.<ShipInfo>.<ShipPostalCode>.Value, _
.OrderDate = Convert.ToDateTime(c.<OrderDate>.Value) _
}
For Each r In result
Console.WriteLine("CustomerID:{0} EmployeeID:{1} ShipPostalCode:{2} OrderDate:{3:d}", _
r.CustomerID, r.EmployeeID, r.ShipPostalCode, r.OrderDate)
Next
End Sub
End Module
Dieser Code erzeugt die folgende Ausgabe:
CustomerID:LETSS EmployeeID:1 ShipPostalCode:94117 OrderDate:6/25/1997
CustomerID:LETSS EmployeeID:8 ShipPostalCode:94117 OrderDate:10/27/1997
CustomerID:LETSS EmployeeID:6 ShipPostalCode:94117 OrderDate:11/10/1997
CustomerID:LETSS EmployeeID:4 ShipPostalCode:94117 OrderDate:2/12/1998
CustomerID:GREAL EmployeeID:6 ShipPostalCode:97403 OrderDate:5/6/1997
CustomerID:GREAL EmployeeID:8 ShipPostalCode:97403 OrderDate:7/4/1997
CustomerID:GREAL EmployeeID:1 ShipPostalCode:97403 OrderDate:7/31/1997
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:7/31/1997
CustomerID:GREAL EmployeeID:6 ShipPostalCode:97403 OrderDate:9/4/1997
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:9/25/1997
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:1/6/1998
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:3/9/1998
CustomerID:GREAL EmployeeID:3 ShipPostalCode:97403 OrderDate:4/7/1998
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:4/22/1998
CustomerID:GREAL EmployeeID:4 ShipPostalCode:97403 OrderDate:4/30/1998
CustomerID:HUNGC EmployeeID:3 ShipPostalCode:97827 OrderDate:12/6/1996
CustomerID:HUNGC EmployeeID:1 ShipPostalCode:97827 OrderDate:12/25/1996
CustomerID:HUNGC EmployeeID:3 ShipPostalCode:97827 OrderDate:1/15/1997
CustomerID:HUNGC EmployeeID:4 ShipPostalCode:97827 OrderDate:7/16/1997
CustomerID:HUNGC EmployeeID:8 ShipPostalCode:97827 OrderDate:9/8/1997
CustomerID:LAZYK EmployeeID:1 ShipPostalCode:99362 OrderDate:3/21/1997
CustomerID:LAZYK EmployeeID:8 ShipPostalCode:99362 OrderDate:5/22/1997