XNode.ElementsBeforeSelf 方法

定義

依照文件順序,傳回這個節點之前同層級項目的集合。Returns a collection of the sibling elements before this node, in document order.

多載

ElementsBeforeSelf()

依照文件順序,傳回這個節點之前同層級項目的集合。Returns a collection of the sibling elements before this node, in document order.

ElementsBeforeSelf(XName)

依照文件順序,傳回這個節點之前同層級項目之篩選的集合。Returns a filtered collection of the sibling elements before this node, in document order. 集合中只會包含具有相符之 XName 的項目。Only elements that have a matching XName are included in the collection.

備註

這個方法會使用延後的執行。This method uses deferred execution.

ElementsBeforeSelf()

依照文件順序,傳回這個節點之前同層級項目的集合。Returns a collection of the sibling elements before this node, in document order.

public:
 System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ ElementsBeforeSelf();
public System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> ElementsBeforeSelf ();
member this.ElementsBeforeSelf : unit -> seq<System.Xml.Linq.XElement>
Public Function ElementsBeforeSelf () As IEnumerable(Of XElement)

傳回

IEnumerable<T>,屬於這個節點之前同層級項目 (依照文件順序) 的 XElementAn IEnumerable<T> of XElement of the sibling elements before this node, in document order.

範例

下列範例會使用此 axis 方法。The following example uses this axis method.

XElement xmlTree = new XElement("Root",  
    new XText("Text content."),  
    new XElement("Child1", "child1 content"),  
    new XElement("Child2", "child2 content"),  
    new XElement("Child3", "child3 content"),  
    new XText("More text content."),  
    new XElement("Child4", "child4 content"),  
    new XElement("Child5", "child5 content")  
);  
XElement child = xmlTree.Element("Child3");  
IEnumerable<XElement> elements = child.ElementsBeforeSelf();  
foreach (XElement el in elements)  
    Console.WriteLine(el.Name);  
Dim xmlTree As XElement = _   
        <Root>Text content.  
            <Child1>child1 content</Child1>  
            <Child2>child2 content</Child2>  
            <Child3>child3 content</Child3>More text content.  
            <Child4>child4 content</Child4>  
            <Child5>child5 content</Child5>  
        </Root>  
  
Dim child As XElement = xmlTree.<Child3>(0)  
Dim elements As IEnumerable(Of XElement) = child.ElementsBeforeSelf()  
  
For Each el In elements  
    Console.WriteLine(el.Name)  
Next  

這個範例會產生下列輸出:This example produces the following output:

Child1  
Child2  

備註

這個方法只會在傳回的集合中包含兄弟。This method only includes siblings in the returned collection. 它不包含下階。It does not include descendants.

這個方法會使用延後的執行。This method uses deferred execution.

另請參閱

ElementsBeforeSelf(XName)

依照文件順序,傳回這個節點之前同層級項目之篩選的集合。Returns a filtered collection of the sibling elements before this node, in document order. 集合中只會包含具有相符之 XName 的項目。Only elements that have a matching XName are included in the collection.

public:
 System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ ElementsBeforeSelf(System::Xml::Linq::XName ^ name);
public System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> ElementsBeforeSelf (System.Xml.Linq.XName name);
member this.ElementsBeforeSelf : System.Xml.Linq.XName -> seq<System.Xml.Linq.XElement>
Public Function ElementsBeforeSelf (name As XName) As IEnumerable(Of XElement)

參數

name
XName

要比對的 XNameThe XName to match.

傳回

IEnumerable<T>,屬於這個節點之前同層級項目 (依照文件順序) 的 XElementAn IEnumerable<T> of XElement of the sibling elements before this node, in document order. 集合中只會包含具有相符之 XName 的項目。Only elements that have a matching XName are included in the collection.

範例

下列範例會使用這個方法。The following example uses this method.

XElement xmlTree = new XElement("Root",  
    new XText("Text content."),  
    new XElement("Child1", "child1 content"),  
    new XElement("Child2", "child2 content"),  
    new XElement("Child3", "child3 content"),  
    new XText("More text content."),  
    new XElement("Child4", "child4 content"),  
    new XElement("Child5", "child5 content")  
);  
XElement child = xmlTree.Element("Child3");  
IEnumerable<XElement> elements = child.ElementsBeforeSelf("Child2");  
foreach (XElement el in elements)  
    Console.WriteLine(el.Name);  
Dim xmlTree As XElement = _   
        <Root>Text content.  
            <Child1>child1 content</Child1>  
            <Child2>child2 content</Child2>  
            <Child3>child3 content</Child3>More text content.  
            <Child4>child4 content</Child4>  
            <Child5>child5 content</Child5>  
        </Root>  
  
Dim child As XElement = xmlTree.<Child3>(0)  
Dim elements As IEnumerable(Of XElement) = child.ElementsBeforeSelf("Child2")  
  
For Each el In elements  
    Console.WriteLine(el.Name)  
Next  

這個範例會產生下列輸出:This example produces the following output:

Child2  

備註

這個方法只會在傳回的集合中包含兄弟。This method only includes siblings in the returned collection. 它不包含下階。It does not include descendants.

這個方法會使用延後的執行。This method uses deferred execution.

另請參閱

適用於