XPathNavigator.InsertBefore 方法

定义

在当前所选节点之前创建新的同级节点。

重载

名称 说明
InsertBefore()

返回一个 XmlWriter 对象,该对象用于在当前所选节点之前创建新的同级节点。

InsertBefore(String)

使用指定的 XML 字符串在当前所选节点之前创建新的同级节点。

InsertBefore(XmlReader)

使用指定的对象的 XML 内容 XmlReader 在当前所选节点之前创建新的同级节点。

InsertBefore(XPathNavigator)

使用指定节点 XPathNavigator 在当前所选节点之前创建新的同级节点。

InsertBefore()

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

返回一个 XmlWriter 对象,该对象用于在当前所选节点之前创建新的同级节点。

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,该对象用于在当前所选节点之前创建新的同级节点。

例外

该节点的位置 XPathNavigator 不允许在当前节点之前插入新的同级节点。

示例

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

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)

该示例将 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

以下是使用 InsertBefore 该方法时要考虑的重要说明。

适用于

InsertBefore(String)

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

使用指定的 XML 字符串在当前所选节点之前创建新的同级节点。

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

新同级节点的 XML 数据字符串。

例外

XML 字符串参数为 null.

该节点的位置 XPathNavigator 不允许在当前节点之前插入新的同级节点。

XML 字符串参数格式不正确。

示例

在以下示例中,在pages文件中,第一个price元素的book子元素之前插入一个新的contosoBooks.xml元素。

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)

该示例将 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。InsertBefore("book") 如果 XML 字符串包含多个节点,则添加所有节点。

以下是使用 InsertBefore 该方法时要考虑的重要说明。

适用于

InsertBefore(XmlReader)

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

使用指定的对象的 XML 内容 XmlReader 在当前所选节点之前创建新的同级节点。

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

XmlReader位于新同级节点的 XML 数据上的对象。

例外

对象 XmlReader 处于错误状态或已关闭。

对象 XmlReader 参数为 null.

该节点的位置 XPathNavigator 不允许在当前节点之前插入新的同级节点。

对象参数的 XmlReader XML 内容格式不正确。

示例

在下面的示例中,使用指定的对象在pages文件中price第一个book元素的子元素之前插入一个新contosoBooks.xml元素XmlReader。 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 = 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)

该示例将 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

以下是使用 InsertBefore 该方法时要考虑的重要说明。

适用于

InsertBefore(XPathNavigator)

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

使用指定节点 XPathNavigator 在当前所选节点之前创建新的同级节点。

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

XPathNavigator定位在要添加为新同级节点的节点上的对象。

例外

对象 XPathNavigator 参数为 null.

该节点的位置 XPathNavigator 不允许在当前节点之前插入新的同级节点。

示例

在下面的示例中,使用指定对象中包含的pages节点,price在文件中第一个book元素的子元素之前插入一个新contosoBooks.xml元素XPathNavigator。 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 = 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)

该示例将 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

以下是使用 InsertBefore 该方法时要考虑的重要说明。

适用于