XPathNavigator.WriteSubtree(XmlWriter) 方法

定义

命名空间:

System.Xml.XPath

程序集:

System.Xml.ReaderWriter.dll

Source:

XPathNavigator.cs

将当前节点及其子节点流式传输到指定的 XmlWriter 对象。

public:
 virtual void WriteSubtree(System::Xml::XmlWriter ^ writer);

public virtual void WriteSubtree (System.Xml.XmlWriter writer);

abstract member WriteSubtree : System.Xml.XmlWriter -> unit
override this.WriteSubtree : System.Xml.XmlWriter -> unit

Public Overridable Sub WriteSubtree (writer As XmlWriter)

参数

writer

XmlWriter

要流向的 XmlWriter 对象。

示例

以下示例演示如何 WriteSubtree 在文件的第一个 book 元素 contosoBooks.xml 上使用 方法。

    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");

XmlWriter^ writer = XmlWriter::Create("contosoBook.xml");
    navigator->WriteSubtree(writer);

    writer->Close();

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");

XmlWriter writer = XmlWriter.Create("contosoBook.xml");
navigator.WriteSubtree(writer);

writer.Close();

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")

Dim writer As XmlWriter = XmlWriter.Create("contosoBook.xml")
navigator.WriteSubtree(writer)

writer.Close()

该示例使用 contosoBooks.xml 文件作为输入。

<?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>  

注解

当前节点的范围内命名空间的命名空间声明插入到流式传输到指定对象的 XML 中 XmlWriter 。

例如，如果在 WriteSubtree 文件的第一个 book 元素 books.xml 上调用 方法，在 http://www.contoso.com/books XML 文档顶部进行的命名空间声明将显示在流式 XmlWriter 传输到指定对象的 XML 中，如以下示例所示。

<?xml version="1.0" encoding="utf-8"?>  
<book genre="autobiography" publicationdate="1981" ISBN="1-861003-11-0" xmlns="http://www.contoso.com/books">  
    <title>The Autobiography of Benjamin Franklin</title>  
    <author>  
        <first-name>Benjamin</first-name>  
        <last-name>Franklin</last-name>  
    </author>  
    <price>8.99</price>  
</book>  

注意

方法 WriteSubtree 不会影响 XPathNavigator的位置。