XPathNavigator.SelectAncestors Metode

Definisi

Ruang nama:

System.Xml.XPath

Rakitan:

System.Xml.ReaderWriter.dll

Memilih semua simpul leluhur dari simpul saat ini yang cocok dengan kriteria pilihan.

Overload

SelectAncestors(XPathNodeType, Boolean)	Memilih semua simpul leluhur dari simpul saat ini yang memiliki pencocokan XPathNodeType.
SelectAncestors(String, String, Boolean)	Memilih semua simpul leluhur dari simpul saat ini yang memiliki nama lokal dan URI namespace yang ditentukan.

SelectAncestors(XPathNodeType, Boolean)

Sumber:

XPathNavigator.cs

Memilih semua simpul leluhur dari simpul saat ini yang memiliki pencocokan XPathNodeType.

public:
 virtual System::Xml::XPath::XPathNodeIterator ^ SelectAncestors(System::Xml::XPath::XPathNodeType type, bool matchSelf);

public virtual System.Xml.XPath.XPathNodeIterator SelectAncestors (System.Xml.XPath.XPathNodeType type, bool matchSelf);

abstract member SelectAncestors : System.Xml.XPath.XPathNodeType * bool -> System.Xml.XPath.XPathNodeIterator
override this.SelectAncestors : System.Xml.XPath.XPathNodeType * bool -> System.Xml.XPath.XPathNodeIterator

Public Overridable Function SelectAncestors (type As XPathNodeType, matchSelf As Boolean) As XPathNodeIterator

Parameter

type

XPathNodeType

Dari XPathNodeType simpul leluhur.

matchSelf

Boolean

Untuk menyertakan simpul konteks dalam pilihan, true; jika tidak, false.

Mengembalikan

XPathNodeIterator

Yang XPathNodeIterator berisi simpul yang dipilih. Simpul yang dikembalikan berada dalam urutan dokumen terbalik.

Contoh

Untuk contoh memilih simpul leluhur, lihat XPathNavigator.SelectAncestors.

Keterangan

Metode SelectAncestors ini tidak berpengaruh pada status XPathNavigator.

Lihat juga

• SelectChildren(XPathNodeType)
• SelectDescendants(XPathNodeType, Boolean)
• Select(XPathExpression)

SelectAncestors(String, String, Boolean)

Sumber:

XPathNavigator.cs

Memilih semua simpul leluhur dari simpul saat ini yang memiliki nama lokal dan URI namespace yang ditentukan.

public:
 virtual System::Xml::XPath::XPathNodeIterator ^ SelectAncestors(System::String ^ name, System::String ^ namespaceURI, bool matchSelf);

public virtual System.Xml.XPath.XPathNodeIterator SelectAncestors (string name, string namespaceURI, bool matchSelf);

abstract member SelectAncestors : string * string * bool -> System.Xml.XPath.XPathNodeIterator
override this.SelectAncestors : string * string * bool -> System.Xml.XPath.XPathNodeIterator

Public Overridable Function SelectAncestors (name As String, namespaceURI As String, matchSelf As Boolean) As XPathNodeIterator

Parameter

name

String

Nama lokal simpul leluhur.

namespaceURI

String

URI namespace layanan simpul leluhur.

matchSelf

Boolean

Untuk menyertakan simpul konteks dalam pilihan, true; jika tidak, false.

Mengembalikan

XPathNodeIterator

Yang XPathNodeIterator berisi simpul yang dipilih. Simpul yang dikembalikan berada dalam urutan dokumen terbalik.

Pengecualian

ArgumentNullException

null tidak dapat diteruskan sebagai parameter.

Contoh

Contoh berikut mengilustrasikan pemilihan simpul leluhur, anak, dan turunan.

XPathDocument^ document = gcnew XPathDocument("contosoBooks.xml");
XPathNavigator^ navigator = document->CreateNavigator();

navigator->MoveToChild("bookstore", "http://www.contoso.com/books");
navigator->MoveToChild("book", "http://www.contoso.com/books");

// Select all the descendant nodes of the book node.
XPathNodeIterator^ bookDescendants = navigator->SelectDescendants("", "http://www.contoso.com/books", false);

// Display the LocalName of each descendant node.
Console::WriteLine("Descendant nodes of the book node:");
while (bookDescendants->MoveNext())
{
    Console::WriteLine(bookDescendants->Current->Name);
}

// Select all the child nodes of the book node.
XPathNodeIterator^ bookChildren = navigator->SelectChildren("", "http://www.contoso.com/books");

// Display the LocalName of each child node.
Console::WriteLine("\nChild nodes of the book node:");
while (bookChildren->MoveNext())
{
    Console::WriteLine(bookChildren->Current->Name);
}

// Select all the ancestor nodes of the title node.
navigator->MoveToChild("title", "http://www.contoso.com/books");

XPathNodeIterator^ bookAncestors = navigator->SelectAncestors("", "http://www.contoso.com/books", false);

// Display the LocalName of each ancestor node.
Console::WriteLine("\nAncestor nodes of the title node:");

while (bookAncestors->MoveNext())
{
    Console::WriteLine(bookAncestors->Current->Name);
}

XPathDocument document = new XPathDocument("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

navigator.MoveToChild("bookstore", "http://www.contoso.com/books");
navigator.MoveToChild("book", "http://www.contoso.com/books");

// Select all the descendant nodes of the book node.
XPathNodeIterator bookDescendants = navigator.SelectDescendants("", "http://www.contoso.com/books", false);

// Display the LocalName of each descendant node.
Console.WriteLine("Descendant nodes of the book node:");
while (bookDescendants.MoveNext())
{
    Console.WriteLine(bookDescendants.Current.Name);
}

// Select all the child nodes of the book node.
XPathNodeIterator bookChildren = navigator.SelectChildren("", "http://www.contoso.com/books");

// Display the LocalName of each child node.
Console.WriteLine("\nChild nodes of the book node:");
while (bookChildren.MoveNext())
{
    Console.WriteLine(bookChildren.Current.Name);
}

// Select all the ancestor nodes of the title node.
navigator.MoveToChild("title", "http://www.contoso.com/books");

XPathNodeIterator bookAncestors = navigator.SelectAncestors("", "http://www.contoso.com/books", false);

// Display the LocalName of each ancestor node.
Console.WriteLine("\nAncestor nodes of the title node:");

while (bookAncestors.MoveNext())
{
    Console.WriteLine(bookAncestors.Current.Name);
}

Dim document As XPathDocument = New XPathDocument("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

navigator.MoveToChild("bookstore", "http://www.contoso.com/books")
navigator.MoveToChild("book", "http://www.contoso.com/books")

' Select all the descendant nodes of the book node.
Dim bookDescendants As XPathNodeIterator = navigator.SelectDescendants("", "http://www.contoso.com/books", False)

' Display the LocalName of each descendant node.
Console.WriteLine("Descendant nodes of the book node:")
While bookDescendants.MoveNext()
    Console.WriteLine(bookDescendants.Current.Name)
End While

' Select all the child nodes of the book node.
Dim bookChildren As XPathNodeIterator = navigator.SelectChildren("", "http://www.contoso.com/books")

' Display the LocalName of each child node.
Console.WriteLine(vbCrLf & "Child nodes of the book node:")
While bookChildren.MoveNext()
    Console.WriteLine(bookChildren.Current.Name)
End While

' Select all the ancestor nodes of the title node.
navigator.MoveToChild("title", "http://www.contoso.com/books")

Dim bookAncestors As XPathNodeIterator = navigator.SelectAncestors("", "http://www.contoso.com/books", False)

' Display the LocalName of each ancestor node.
Console.WriteLine(vbCrLf & "Ancestor nodes of the title node:")

While bookAncestors.MoveNext()
    Console.WriteLine(bookAncestors.Current.Name)
End While

Contoh menggunakan file contosoBooks.xml sebagai input.

<?xml version="1.0" encoding="utf-8" ?>  
<bookstore xmlns="http://www.contoso.com/books">  
    <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0">  
        <title>The Autobiography of Benjamin Franklin</title>  
        <author>  
            <first-name>Benjamin</first-name>  
            <last-name>Franklin</last-name>  
        </author>  
        <price>8.99</price>  
    </book>  
    <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2">  
        <title>The Confidence Man</title>  
        <author>  
            <first-name>Herman</first-name>  
            <last-name>Melville</last-name>  
        </author>  
        <price>11.99</price>  
    </book>  
    <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6">  
        <title>The Gorgias</title>  
        <author>  
            <name>Plato</name>  
        </author>  
        <price>9.99</price>  
    </book>  
</bookstore>  

Keterangan

Jika String.Empty ditentukan sebagai name parameter, semua simpul leluhur yang termasuk dalam namespace URI yang ditentukan dipilih. Jika String.Empty ditentukan sebagai namespaceURI parameter, semua simpul leluhur dengan nama lokal yang ditentukan yang termasuk dalam namespace tidak dipilih. Jika String.Empty ditentukan sebagai nama lokal dan URI namespace, semua simpul leluhur yang termasuk dalam namespace tidak dipilih.

Metode SelectAncestors ini tidak berpengaruh pada status XPathNavigator.

Lihat juga

• SelectChildren(XPathNodeType)
• SelectDescendants(XPathNodeType, Boolean)
• Select(XPathExpression)