Extensions.AncestorsAndSelf 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
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> 的 XElement,其中包含來源集合。
傳回
IEnumerable<T> 的 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> 的 XElement,其中包含來源集合。
傳回
IEnumerable<T> 的 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。