共用方式為


Extensions.AncestorsAndSelf 方法

定義

傳回包含來源集合中每個項目的項目集合,以及來源集合中每個項目的祖系。

多載

AncestorsAndSelf(IEnumerable<XElement>)

傳回包含來源集合中每個項目的項目集合,以及來源集合中每個項目的祖系。

AncestorsAndSelf(IEnumerable<XElement>, XName)

傳回包含來源集合中每個項目的已篩選項目集合,以及來源集合中每個項目的祖系。 集合中只會包含具有相符之 XName 的項目。

備註

如果來源集合中的多個節點具有相同的上階,則上階將會在結果集合中包含多次。 若要避免這種情況,請使用 Distinct 方法。

這個方法會使用延後的執行。

AncestorsAndSelf(IEnumerable<XElement>)

傳回包含來源集合中每個項目的項目集合,以及來源集合中每個項目的祖系。

public:
[System::Runtime::CompilerServices::Extension]
 static System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ AncestorsAndSelf(System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ source);
public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> AncestorsAndSelf (this System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> source);
public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> AncestorsAndSelf (this System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement?> source);
static member AncestorsAndSelf : seq<System.Xml.Linq.XElement> -> seq<System.Xml.Linq.XElement>
<Extension()>
Public Function AncestorsAndSelf (source As IEnumerable(Of XElement)) As IEnumerable(Of XElement)

參數

source
IEnumerable<XElement>

IEnumerable<T>XElement,其中包含來源集合。

傳回

IEnumerable<XElement>

IEnumerable<T>XElement,包含來源集合中的每個項目,以及來源集合中每個項目的祖系。

範例

下列範例會擷取大子系專案的集合。 然後,它會使用此軸方法來擷取集合中所有元素的所有上階和自我。

XElement xmlTree = new XElement("Root",  
    new XElement("Child1",  
        new XElement("GrandChild1",  
            new XElement("GreatGrandChild1", "content")  
        )  
    ),  
    new XElement("Child2",  
        new XElement("GrandChild2",  
            new XElement("GreatGrandChild2", "content")  
        )  
    )  
);  
IEnumerable<XElement> greatGrandChildren =  
    from el in xmlTree.Descendants()  
    where el.Name.LocalName.StartsWith("Great")  
    select el;  

Console.WriteLine("Great Grand Children Elements");  
Console.WriteLine("----");  
foreach (XElement de in greatGrandChildren)  
    Console.WriteLine(de.Name);  

IEnumerable<XElement> allAncestors =  
    from el in greatGrandChildren.AncestorsAndSelf().Distinct()  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors and Self");  
Console.WriteLine("----");  
foreach (XElement de in allAncestors)  
    Console.WriteLine(de.Name);  
Dim xmlTree As XElement = _   
    <Root>  
        <Child1>  
            <GrandChild1>  
                <GreatGrandChild1>content</GreatGrandChild1>  
            </GrandChild1>  
        </Child1>  
        <Child2>  
            <GrandChild2>  
                <GreatGrandChild2>content</GreatGrandChild2>  
            </GrandChild2>  
        </Child2>  
    </Root>  

Dim greatGrandChildren = From el In xmlTree.Descendants _  
                         Where el.Name.LocalName.StartsWith("Great") _  
                         Select el  

Console.WriteLine("Great Grand Children Elements")  
Console.WriteLine("----")  

For Each de As XElement In greatGrandChildren  
    Console.WriteLine(de.Name)  
Next  

Dim allAncestors = From el In greatGrandChildren.AncestorsAndSelf.Distinct _  
                   Select el  

Console.WriteLine("")  
Console.WriteLine("Ancestors and Self")  
Console.WriteLine("----")  

For Each de As XElement In allAncestors  
    Console.WriteLine(de.Name)  
Next  

這個範例會產生下列輸出:

Great Grand Children Elements  
----  
GreatGrandChild1  
GreatGrandChild2  

Ancestors and Self  
----  
GreatGrandChild1  
GrandChild1  
Child1  
Root  
GreatGrandChild2  
GrandChild2  
Child2  

以下是相同的範例,但在此情況下,XML 位於命名空間中。 如需詳細資訊,請參閱 使用 XML 命名空間

XNamespace aw = "http://www.adventure-works.com";  
XElement xmlTree = new XElement(aw + "Root",  
    new XElement(aw + "Child1",  
        new XElement(aw + "GrandChild1",  
            new XElement(aw + "GreatGrandChild1", "content")  
        )  
    ),  
    new XElement(aw + "Child2",  
        new XElement(aw + "GrandChild2",  
            new XElement(aw + "GreatGrandChild2", "content")  
        )  
    )  
);  
IEnumerable<XElement> greatGrandChildren =  
    from el in xmlTree.Descendants()  
    where el.Name.LocalName.StartsWith("Great")  
    select el;  

Console.WriteLine("Great Grand Children Elements");  
Console.WriteLine("----");  
foreach (XElement de in greatGrandChildren)  
    Console.WriteLine(de.Name);  

IEnumerable<XElement> allAncestors =  
    from el in greatGrandChildren.AncestorsAndSelf().Distinct()  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors and Self");  
Console.WriteLine("----");  
foreach (XElement de in allAncestors)  
    Console.WriteLine(de.Name);  
Imports <xmlns="http://www.adventure-works.com">  

Module Module1  
    Sub Main()  
        Dim xmlTree As XElement = _  
            <Root>  
                <Child1>  
                    <GrandChild1>  
                        <GreatGrandChild1>content</GreatGrandChild1>  
                    </GrandChild1>  
                </Child1>  
                <Child2>  
                    <GrandChild2>  
                        <GreatGrandChild2>content</GreatGrandChild2>  
                    </GrandChild2>  
                </Child2>  
            </Root>  

        Dim greatGrandChildren = From el In xmlTree.Descendants _  
                                 Where el.Name.LocalName.StartsWith("Great") _  
                                 Select el  

        Console.WriteLine("Great Grand Children Elements")  
        Console.WriteLine("----")  

        For Each de As XElement In greatGrandChildren  
            Console.WriteLine(de.Name)  
        Next  

        Dim allAncestors = From el In greatGrandChildren.AncestorsAndSelf.Distinct _  
                           Select el  

        Console.WriteLine("")  
        Console.WriteLine("Ancestors and Self")  
        Console.WriteLine("----")  

        For Each de As XElement In allAncestors  
            Console.WriteLine(de.Name)  
        Next  
    End Sub  
End Module  

這個範例會產生下列輸出:

Great Grand Children Elements  
----  
{http://www.adventure-works.com}GreatGrandChild1  
{http://www.adventure-works.com}GreatGrandChild2  

Ancestors and Self  
----  
{http://www.adventure-works.com}GreatGrandChild1  
{http://www.adventure-works.com}GrandChild1  
{http://www.adventure-works.com}Child1  
{http://www.adventure-works.com}Root  
{http://www.adventure-works.com}GreatGrandChild2  
{http://www.adventure-works.com}GrandChild2  
{http://www.adventure-works.com}Child2  

備註

如果來源集合中的多個節點具有相同的上階,則上階將會在結果集合中包含多次。 若要避免這種情況,請使用 Distinct 方法。

這個方法會使用延後的執行。

另請參閱

適用於

AncestorsAndSelf(IEnumerable<XElement>, XName)

傳回包含來源集合中每個項目的已篩選項目集合,以及來源集合中每個項目的祖系。 集合中只會包含具有相符之 XName 的項目。

public:
[System::Runtime::CompilerServices::Extension]
 static System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ AncestorsAndSelf(System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ source, System::Xml::Linq::XName ^ name);
public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> AncestorsAndSelf (this System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> source, System.Xml.Linq.XName name);
public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> AncestorsAndSelf (this System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement?> source, System.Xml.Linq.XName? name);
static member AncestorsAndSelf : seq<System.Xml.Linq.XElement> * System.Xml.Linq.XName -> seq<System.Xml.Linq.XElement>
<Extension()>
Public Function AncestorsAndSelf (source As IEnumerable(Of XElement), name As XName) As IEnumerable(Of XElement)

參數

source
IEnumerable<XElement>

IEnumerable<T>XElement,其中包含來源集合。

name
XName

要比對的 XName

傳回

IEnumerable<XElement>

IEnumerable<T>XElement,包含來源集合中的每個項目,以及來源集合中每個項目的祖系。 集合中只會包含具有相符之 XName 的項目。

範例

下列範例會擷取大子系專案的集合。 然後,它會使用此軸方法來擷取集合中符合指定 XName 之所有元素的所有自我和祖系。

XElement xmlTree = new XElement("Root",  
    new XElement("Child1",  
        new XElement("GrandChild1",  
            new XElement("GreatGrandChild1", "content")  
        )  
    ),  
    new XElement("Child2",  
        new XElement("GrandChild2",  
            new XElement("GreatGrandChild2", "content")  
        )  
    )  
);  
IEnumerable<XElement> greatGrandChildren =  
    from el in xmlTree.Descendants()  
    where el.Name.LocalName.StartsWith("Great")  
    select el;  

Console.WriteLine("Great Grand Children Elements");  
Console.WriteLine("----");  
foreach (XElement de in greatGrandChildren)  
    Console.WriteLine(de.Name);  

IEnumerable<XElement> allAncestors =  
    from el in greatGrandChildren.AncestorsAndSelf("GreatGrandChild1")  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors and Self");  
Console.WriteLine("----");  
foreach (XElement de in allAncestors)  
    Console.WriteLine(de.Name);  
Dim xmlTree As XElement = _  
    <Root>  
        <Child1>  
            <GrandChild1>  
                <GreatGrandChild1>content</GreatGrandChild1>  
            </GrandChild1>  
        </Child1>  
        <Child2>  
            <GrandChild2>  
                <GreatGrandChild2>content</GreatGrandChild2>  
            </GrandChild2>  
        </Child2>  
    </Root>  

Dim greatGrandChildren = From el In xmlTree.Descendants _  
                         Where el.Name.LocalName.StartsWith("Great") _  
                         Select el  

Console.WriteLine("Great Grand Children Elements")  
Console.WriteLine("----")  

For Each de As XElement In greatGrandChildren  
    Console.WriteLine(de.Name)  
Next  

Dim allAncestors = From el In greatGrandChildren.AncestorsAndSelf("GreatGrandChild1") _  
                   Select el  

Console.WriteLine("")  
Console.WriteLine("Ancestors and Self")  
Console.WriteLine("----")  

For Each de As XElement In allAncestors  
    Console.WriteLine(de.Name)  
Next  

這個範例會產生下列輸出:

Great Grand Children Elements  
----  
GreatGrandChild1  
GreatGrandChild2  

Ancestors and Self  
----  
GreatGrandChild1  

以下是相同的範例,但在此情況下,XML 位於命名空間中。 如需詳細資訊,請參閱 使用 XML 命名空間

XNamespace aw = "http://www.adventure-works.com";  
XElement xmlTree = new XElement(aw + "Root",  
    new XElement(aw + "Child1",  
        new XElement(aw + "GrandChild1",  
            new XElement(aw + "GreatGrandChild1", "content")  
        )  
    ),  
    new XElement(aw + "Child2",  
        new XElement(aw + "GrandChild2",  
            new XElement(aw + "GreatGrandChild2", "content")  
        )  
    )  
);  
IEnumerable<XElement> greatGrandChildren =  
    from el in xmlTree.Descendants()  
    where el.Name.LocalName.StartsWith("Great")  
    select el;  

Console.WriteLine("Great Grand Children Elements");  
Console.WriteLine("----");  
foreach (XElement de in greatGrandChildren)  
    Console.WriteLine(de.Name);  

IEnumerable<XElement> allAncestors =  
    from el in greatGrandChildren.AncestorsAndSelf(aw + "GreatGrandChild1")  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors and Self");  
Console.WriteLine("----");  
foreach (XElement de in allAncestors)  
    Console.WriteLine(de.Name);  
Imports <xmlns="http://www.adventure-works.com">  

Module Module1  
    Sub Main()  
        Dim xmlTree As XElement = _  
            <Root>  
                <Child1>  
                    <GrandChild1>  
                        <GreatGrandChild1>content</GreatGrandChild1>  
                    </GrandChild1>  
                </Child1>  
                <Child2>  
                    <GrandChild2>  
                        <GreatGrandChild2>content</GreatGrandChild2>  
                    </GrandChild2>  
                </Child2>  
            </Root>  

        Dim greatGrandChildren = From el In xmlTree.Descendants _  
                                 Where el.Name.LocalName.StartsWith("Great") _  
                                 Select el  

        Console.WriteLine("Great Grand Children Elements")  
        Console.WriteLine("----")  

        For Each de As XElement In greatGrandChildren  
            Console.WriteLine(de.Name)  
        Next  

        Dim allAncestors = From el In greatGrandChildren.AncestorsAndSelf(GetXmlNamespace() + "GreatGrandChild1") _  
                           Select el  

        Console.WriteLine("")  
        Console.WriteLine("Ancestors and Self")  
        Console.WriteLine("----")  

        For Each de As XElement In allAncestors  
            Console.WriteLine(de.Name)  
        Next  
    End Sub  
End Module  

這個範例會產生下列輸出:

Great Grand Children Elements  
----  
{http://www.adventure-works.com}GreatGrandChild1  
{http://www.adventure-works.com}GreatGrandChild2  

Ancestors and Self  
----  
{http://www.adventure-works.com}GreatGrandChild1  

備註

如果來源集合中的多個節點具有相同的上階與相符 XName 的 ,則上階將會在結果集合中包含多次。

這個方法會使用延後的執行。

另請參閱

適用於