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Cara mengurutkan elemen pada beberapa kunci (LINQ ke XML)

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Artikel ini memperlihatkan cara mengurutkan beberapa kunci di C# dan Visual Basic.

Pelajari cara mengurutkan elemen XML pada beberapa kunci

Contoh ini mengurutkan dua kunci: pengiriman kode pos (utama) dan tanggal pesanan. Ini menggunakan dokumen XML Sampel file XML: Pelanggan dan pesanan.

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

Contoh ini menghasilkan output berikut:

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

Contoh: Temukan di XML yang ada di namespace

Contoh ini melakukan pengurutan yang sama dengan yang pertama, tetapi untuk XML yang ada di namespace layanan. Ini menggunakan dokumen XML Sampel file XML: Pelanggan dan pesanan.

Untuk informasi lebih lanjut, lihat Ringkasan kumpulan nama XML.

XElement co = XElement.Load("CustomersOrdersInNamespace.xml");
XNamespace aw = "http://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='http://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

Contoh ini menghasilkan output berikut:

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

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