Extensions.Ancestors メソッド

定義

名前空間:: System.Xml.Linq

アセンブリ:: System.Xml.XDocument.dll

アセンブリ:: System.Xml.Linq.dll

アセンブリ:: netstandard.dll

ソースコレクション内のすべてのノードの先祖が格納された、要素のコレクションを返します。Returns a collection of elements that contains the ancestors of every node in the source collection.

オーバーロード

Ancestors<T>(IEnumerable<T>)

Ancestors<T>(IEnumerable<T>, XName)

ソースコレクション内のすべてのノードの先祖が格納され、フィルター処理された要素のコレクションを返します。Returns a filtered collection of elements that contains the ancestors of every node in the source collection. 一致する XName を持つ要素のみがコレクションに含められます。Only elements that have a matching XName are included in the collection.

注釈

ソースコレクション内の複数のノードが同じ先祖を持つ場合、先祖は結果コレクションに複数回含まれます。If multiple nodes in the source collection have the same ancestor, the ancestor will be included multiple times in the result collection. これを回避するには、メソッドを使用し Distinct ます。To avoid this, use the Distinct method.

このメソッドは遅延実行を使用します。This method uses deferred execution.

Ancestors<T>(IEnumerable<T>)

public:
generic <typename T>
 where T : System::Xml::Linq::XNode[System::Runtime::CompilerServices::Extension]
 static System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ Ancestors(System::Collections::Generic::IEnumerable<T> ^ source);

public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> Ancestors<T> (this System.Collections.Generic.IEnumerable<T> source) where T : System.Xml.Linq.XNode;

public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> Ancestors<T> (this System.Collections.Generic.IEnumerable<T>? source) where T : System.Xml.Linq.XNode;

static member Ancestors : seq<'T (requires 'T :> System.Xml.Linq.XNode)> -> seq<System.Xml.Linq.XElement> (requires 'T :> System.Xml.Linq.XNode)

<Extension()>
Public Function Ancestors(Of T As XNode) (source As IEnumerable(Of T)) As IEnumerable(Of XElement)

型パラメーター

T

XNode に制限された、source 内のオブジェクトの型。The type of the objects in source, constrained to XNode.

パラメーター

source: IEnumerable<T>

ソースコレクションが格納されている IEnumerable<T> の XNode。An IEnumerable<T> of XNode that contains the source collection.

戻り値

IEnumerable<XElement>

ソースコレクション内のすべてのノードの先祖が格納された、IEnumerable<T> の XElement。An IEnumerable<T> of XElement that contains the ancestors of every node in the source collection.

例

次の例では、優れた孫要素のコレクションを取得します。The following example retrieves a collection of the great grandchildren elements. 次に、この軸メソッドを使用して、コレクション内のすべての要素の先祖をすべて取得します。It then uses this axis method to retrieve all ancestors of all elements in the collection.

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.Ancestors().Distinct()  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors");  
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.Ancestors.Distinct _  
                   Select el  

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

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

この例を実行すると、次の出力が生成されます。This example produces the following output:

Great Grand Children Elements  
----  
GreatGrandChild1  
GreatGrandChild2  

Ancestors  
----  
GrandChild1  
Child1  
Root  
GrandChild2  
Child2

次の例は同じですが、この場合は XML が名前空間に含まれています。The following is the same example, but in this case the XML is in a namespace. 詳細については、「 XML 名前空間の操作」を参照してください。For more information, see Work with XML Namespaces.

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.Ancestors().Distinct()  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors");  
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.Ancestors.Distinct _  
                           Select el  

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

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

この例を実行すると、次の出力が生成されます。This example produces the following output:

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

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

注釈

このメソッドは遅延実行を使用します。This method uses deferred execution.

こちらもご覧ください

適用対象

Ancestors<T>(IEnumerable<T>, XName)

public:
generic <typename T>
 where T : System::Xml::Linq::XNode[System::Runtime::CompilerServices::Extension]
 static System::Collections::Generic::IEnumerable<System::Xml::Linq::XElement ^> ^ Ancestors(System::Collections::Generic::IEnumerable<T> ^ source, System::Xml::Linq::XName ^ name);

public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> Ancestors<T> (this System.Collections.Generic.IEnumerable<T> source, System.Xml.Linq.XName name) where T : System.Xml.Linq.XNode;

public static System.Collections.Generic.IEnumerable<System.Xml.Linq.XElement> Ancestors<T> (this System.Collections.Generic.IEnumerable<T>? source, System.Xml.Linq.XName? name) where T : System.Xml.Linq.XNode;

static member Ancestors : seq<'T (requires 'T :> System.Xml.Linq.XNode)> * System.Xml.Linq.XName -> seq<System.Xml.Linq.XElement> (requires 'T :> System.Xml.Linq.XNode)

<Extension()>
Public Function Ancestors(Of T As XNode) (source As IEnumerable(Of T), name As XName) As IEnumerable(Of XElement)

型パラメーター

T

XNode に制限された、source 内のオブジェクトの型。The type of the objects in source, constrained to XNode.

パラメーター

source: IEnumerable<T>

ソースコレクションが格納されている IEnumerable<T> の XNode。An IEnumerable<T> of XNode that contains the source collection.

name: XName

照合する XName。The XName to match.

戻り値

IEnumerable<XElement>

ソースコレクション内のすべてのノードの先祖が格納された、IEnumerable<T> の XElement。An IEnumerable<T> of XElement that contains the ancestors of every node in the source collection. 一致する XName を持つ要素のみがコレクションに含められます。Only elements that have a matching XName are included in the collection.

例

次の例では、優れた孫要素のコレクションを取得します。The following example retrieves a collection of the great grandchildren elements. 次に、この軸メソッドを使用して、指定したに一致するコレクション内のすべての要素のすべての先祖を取得し XName ます。It then uses this axis method to retrieve all ancestors of all elements in the collection that match a specified XName.

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.Ancestors("Child1")  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors");  
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.Ancestors("Child1") _  
                   Select el  

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

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

この例を実行すると、次の出力が生成されます。This example produces the following output:

Great Grand Children Elements  
----  
GreatGrandChild1  
GreatGrandChild2  

Ancestors  
----  
Child1

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.Ancestors(aw + "Child1")  
    select el;  

Console.WriteLine("");  
Console.WriteLine("Ancestors");  
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.Ancestors(GetXmlNamespace() + "Child1") _  
                           Select el  

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

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

この例を実行すると、次の出力が生成されます。This example produces the following output:

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

Ancestors  
----  
{http://www.adventure-works.com}Child1

注釈

ソースコレクション内の複数のノードの先祖が一致する場合 XName 、先祖は結果コレクションに複数回含まれます。If multiple nodes in the source collection have the same ancestor with a matching XName, the ancestor will be included multiple times in the result collection.

このメソッドは遅延実行を使用します。This method uses deferred execution.

こちらもご覧ください

適用対象

Extensions.Ancestors メソッド

定義

オーバーロード

注釈

Ancestors<T>(IEnumerable<T>)

型パラメーター

パラメーター

戻り値

例

注釈

こちらもご覧ください

適用対象

Ancestors<T>(IEnumerable<T>, XName)

型パラメーター

パラメーター

戻り値

例

注釈

こちらもご覧ください

適用対象

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