XPathNavigator.InsertBefore 方法

定义

在当前选定的节点之前创建一个新的同级节点。

重载

InsertBefore()

返回一个 XmlWriter 对象,该对象用于在当前选定的节点之前创建一个新的同级节点。

InsertBefore(String)

使用指定的 XML 字符串在当前选定的节点之前创建一个新的同级节点。

InsertBefore(XmlReader)

使用 XmlReader 对象指定的 XML 内容在当前选定的节点之前创建一个新的同级节点。

InsertBefore(XPathNavigator)

使用指定的 XPathNavigator 中的节点在当前选定的节点之前创建一个新的同级节点。

InsertBefore()

Source:
XPathNavigator.cs
Source:
XPathNavigator.cs
Source:
XPathNavigator.cs

返回一个 XmlWriter 对象,该对象用于在当前选定的节点之前创建一个新的同级节点。

public:
 virtual System::Xml::XmlWriter ^ InsertBefore();
public virtual System.Xml.XmlWriter InsertBefore ();
abstract member InsertBefore : unit -> System.Xml.XmlWriter
override this.InsertBefore : unit -> System.Xml.XmlWriter
Public Overridable Function InsertBefore () As XmlWriter

返回

一个 XmlWriter 对象,它用于在当前所选节点的前面创建一个新的同级节点。

例外

位置 XPathNavigator 不允许在当前节点之前插入一个新的同级节点。

示例

在下面的示例中,使用 XmlWriter 方法返回的对象,contosoBooks.xml在文件中第一个book元素的子元素之前price插入一InsertBefore个新pages元素。

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

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

XmlWriter^ pages = navigator->InsertBefore();
pages->WriteElementString("pages", "100");
pages->Close();

navigator->MoveToParent();
Console::WriteLine(navigator->OuterXml);
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

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

XmlWriter pages = navigator.InsertBefore();
pages.WriteElementString("pages", "100");
pages.Close();

navigator.MoveToParent();
Console.WriteLine(navigator.OuterXml);
Dim document As XmlDocument = New XmlDocument()
document.Load("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

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

Dim pages As XmlWriter = navigator.InsertBefore()
pages.WriteElementString("pages", "100")
pages.Close()

navigator.MoveToParent()
Console.WriteLine(navigator.OuterXml)

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

下面是使用 InsertBefore 方法时要考虑的重要注意事项。

适用于

InsertBefore(String)

Source:
XPathNavigator.cs
Source:
XPathNavigator.cs
Source:
XPathNavigator.cs

使用指定的 XML 字符串在当前选定的节点之前创建一个新的同级节点。

public:
 virtual void InsertBefore(System::String ^ newSibling);
public virtual void InsertBefore (string newSibling);
abstract member InsertBefore : string -> unit
override this.InsertBefore : string -> unit
Public Overridable Sub InsertBefore (newSibling As String)

参数

newSibling
String

新的同级节点的 XML 数据字符串。

例外

XML 字符串参数是 null

位置 XPathNavigator 不允许在当前节点之前插入一个新的同级节点。

XML 字符串参数的格式不正确。

示例

在以下示例中,在 pages 文件中第一个 price 元素的 book 子元素之前插入新的 contosoBooks.xml 元素。

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

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

navigator->InsertBefore("<pages>100</pages>");

navigator->MoveToParent();
Console::WriteLine(navigator->OuterXml);
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

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

navigator.InsertBefore("<pages>100</pages>");

navigator.MoveToParent();
Console.WriteLine(navigator.OuterXml);
Dim document As XmlDocument = New XmlDocument()
document.Load("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

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

navigator.InsertBefore("<pages>100</pages>")

navigator.MoveToParent()
Console.WriteLine(navigator.OuterXml)

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

若要创建新的元素节点,请在 XML 字符串参数中包含所有 XML 语法。 新 book 节点的字符串为 InsertBefore("<book/>")。 在当前节点的文本节点之前插入文本“book”的字符串为 InsertBefore("book")。 如果 XML 字符串包含多个节点,则添加所有节点。

下面是使用 InsertBefore 方法时要考虑的重要注意事项。

适用于

InsertBefore(XmlReader)

Source:
XPathNavigator.cs
Source:
XPathNavigator.cs
Source:
XPathNavigator.cs

使用 XmlReader 对象指定的 XML 内容在当前选定的节点之前创建一个新的同级节点。

public:
 virtual void InsertBefore(System::Xml::XmlReader ^ newSibling);
public virtual void InsertBefore (System.Xml.XmlReader newSibling);
abstract member InsertBefore : System.Xml.XmlReader -> unit
override this.InsertBefore : System.Xml.XmlReader -> unit
Public Overridable Sub InsertBefore (newSibling As XmlReader)

参数

newSibling
XmlReader

一个定位在新的同级节点的 XML 数据上的 XmlReader 对象。

例外

XmlReader 对象处于错误状态或者已关闭。

XmlReader 对象参数是 null

位置 XPathNavigator 不允许在当前节点之前插入一个新的同级节点。

XmlReader 对象参数的 XML 内容格式不正确。

示例

在以下示例中,使用指定的 对象在文件中第一个book元素的子元素之前price插入一XmlReader个新pages元素contosoBooks.xml。 指定 http://www.contoso.com/books 命名空间,以便使用与 XML 文档相同的命名空间插入新的同级元素。

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

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

XmlReader^ pages = XmlReader::Create(gcnew StringReader("<pages xmlns=\"http://www.contoso.com/books\">100</pages>"));

navigator->InsertBefore(pages);

navigator->MoveToParent();
Console::WriteLine(navigator->OuterXml);
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

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

XmlReader pages = XmlReader.Create(new StringReader("<pages xmlns=\"http://www.contoso.com/books\">100</pages>"));

navigator.InsertBefore(pages);

navigator.MoveToParent();
Console.WriteLine(navigator.OuterXml);
Dim document As XmlDocument = New XmlDocument()
document.Load("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

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

Dim pages As XmlReader = XmlReader.Create(New StringReader("<pages xmlns='http://www.contoso.com/books'>100</pages>"))

navigator.InsertBefore(pages)

navigator.MoveToParent()
Console.WriteLine(navigator.OuterXml)

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

下面是使用 InsertBefore 方法时要考虑的重要注意事项。

适用于

InsertBefore(XPathNavigator)

Source:
XPathNavigator.cs
Source:
XPathNavigator.cs
Source:
XPathNavigator.cs

使用指定的 XPathNavigator 中的节点在当前选定的节点之前创建一个新的同级节点。

public:
 virtual void InsertBefore(System::Xml::XPath::XPathNavigator ^ newSibling);
public virtual void InsertBefore (System.Xml.XPath.XPathNavigator newSibling);
abstract member InsertBefore : System.Xml.XPath.XPathNavigator -> unit
override this.InsertBefore : System.Xml.XPath.XPathNavigator -> unit
Public Overridable Sub InsertBefore (newSibling As XPathNavigator)

参数

newSibling
XPathNavigator

一个 XPathNavigator 对象,该对象被定位在将作为新的同级节点添加的节点上。

例外

XPathNavigator 对象参数是 null

位置 XPathNavigator 不允许在当前节点之前插入一个新的同级节点。

示例

在以下示例中,使用指定对象中包含的节点在contosoBooks.xml文件中第一个book元素的子元素之前price插入一XPathNavigator个新pages元素。 指定 http://www.contoso.com/books 命名空间,以便使用与 XML 文档相同的命名空间插入新的同级元素。

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

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

XmlDocument^ childNodes = gcnew XmlDocument();
childNodes->Load(gcnew StringReader("<pages xmlns=\"http://www.contoso.com/books\">100</pages>"));
XPathNavigator^ childNodesNavigator = childNodes->CreateNavigator();

navigator->InsertBefore(childNodesNavigator);

navigator->MoveToParent();
Console::WriteLine(navigator->OuterXml);
XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

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

XmlDocument childNodes = new XmlDocument();
childNodes.Load(new StringReader("<pages xmlns=\"http://www.contoso.com/books\">100</pages>"));
XPathNavigator childNodesNavigator = childNodes.CreateNavigator();

navigator.InsertBefore(childNodesNavigator);

navigator.MoveToParent();
Console.WriteLine(navigator.OuterXml);
Dim document As XmlDocument = New XmlDocument()
document.Load("contosoBooks.xml")
Dim navigator As XPathNavigator = document.CreateNavigator()

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

Dim childNodes As XmlDocument = New XmlDocument()
childNodes.Load(New StringReader("<pages xmlns='http://www.contoso.com/books'>100</pages>"))
Dim childNodesNavigator As XPathNavigator = childNodes.CreateNavigator()

navigator.InsertBefore(childNodesNavigator)

navigator.MoveToParent()
Console.WriteLine(navigator.OuterXml)

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

下面是使用 InsertBefore 方法时要考虑的重要注意事项。

适用于