XObject.Annotations 方法

定义

命名空间:
System.Xml.Linq
程序集:
System.Xml.Linq.dll, System.Xml.XDocument.dll
程序集:
netstandard.dll, System.Xml.XDocument.dll
程序集:
System.Xml.XDocument.dll
程序集:
System.Xml.Linq.dll
程序集:
netstandard.dll

重载

名称 说明
Annotations(Type)

获取指定 XObject类型的批注的集合。
Annotations<T>()

获取指定 XObject类型的批注的集合。

Annotations(Type)

Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs

获取指定 XObject类型的批注的集合。

public:
 System::Collections::Generic::IEnumerable<System::Object ^> ^ Annotations(Type ^ type);
public System.Collections.Generic.IEnumerable<object> Annotations(Type type);
member this.Annotations : Type -> seq<obj>
Public Function Annotations (type As Type) As IEnumerable(Of Object)

参数

type
Type

要检索的批注的类型。

返回

IEnumerable<Object>

其中IEnumerable<T>一个Object包含与此指定类型XObject匹配的批注。

示例

下面的示例向某个 XElement批注添加一些注释，然后使用此方法检索批注的集合。

public class MyAnnotation
{
    private string tag;
    public string Tag { get { return tag; } set { tag = value; } }
    public MyAnnotation(string tag)
    {
        this.tag = tag;
    }
}

class Program
{
    static void Main(string[] args)
    {
        XElement root = new XElement("Root", "content");
        root.AddAnnotation(new MyAnnotation("T1"));
        root.AddAnnotation(new MyAnnotation("T2"));
        root.AddAnnotation("abc");
        root.AddAnnotation("def");

        IEnumerable<object> annotationList;
        annotationList = root.Annotations(typeof(MyAnnotation));
        foreach (object ma in annotationList)
            Console.WriteLine(((MyAnnotation)ma).Tag);
        Console.WriteLine("----");

        IEnumerable<object> stringAnnotationList;
        stringAnnotationList = root.Annotations(typeof(string));
        foreach (object str in stringAnnotationList)
            Console.WriteLine((string)str);
    }
}

Public Class MyAnnotation
    Private _tag As String

    Property Tag() As String
        Get
            Return Me._tag
        End Get
        Set(ByVal Value As String)
            Me._tag = Value
        End Set
    End Property

    Public Sub New(ByVal tag As String)
        Me._tag = tag
    End Sub
End Class

Module Module1
    Sub Main()
        Dim root As XElement = <Root>content</Root>
        root.AddAnnotation(New MyAnnotation("T1"))
        root.AddAnnotation(New MyAnnotation("T2"))
        root.AddAnnotation("abc")
        root.AddAnnotation("def")

        Dim annotationList As IEnumerable(Of Object)
        annotationList = root.Annotations(GetType(MyAnnotation))
        For Each ma As MyAnnotation In annotationList
            Console.WriteLine(ma.Tag)
        Next

        Console.WriteLine("----")

        Dim stringAnnotationList As IEnumerable(Of Object)
        stringAnnotationList = root.Annotations(GetType(String))
        For Each str As String In stringAnnotationList
            Console.WriteLine(str)
        Next
    End Sub
End Module

此示例生成以下输出：

T1
T2
----
abc
def

另请参阅

适用于

Annotations<T>()

Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs
Source:
XObject.cs

获取指定 XObject类型的批注的集合。

public:
generic <typename T>
 where T : class System::Collections::Generic::IEnumerable<T> ^ Annotations();
public System.Collections.Generic.IEnumerable<T> Annotations<T>() where T : class;
member this.Annotations : unit -> seq<'T (requires 'T : null)> (requires 'T : null)
Public Function Annotations(Of T As Class) () As IEnumerable(Of T)
Public Iterator Function Annotations(Of T As Class) () As IEnumerable(Of T)

类型参数

T

要检索的批注的类型。

返回

IEnumerable<T>

包含此IEnumerable<T>注释的一个 XObject 。

示例

以下示例使用此方法检索元素上的批注。

public class MyAnnotation {
    private string tag;
    public string Tag {get{return tag;} set{tag=value;}}
    public MyAnnotation(string tag) {
        this.tag = tag;
    }
}

class Program {
    static void Main(string[] args) {
        XElement root = new XElement("Root", "content");
        root.AddAnnotation(new MyAnnotation("T1"));
        root.AddAnnotation(new MyAnnotation("T2"));
        root.AddAnnotation("abc");
        root.AddAnnotation("def");

        IEnumerable<MyAnnotation> annotationList;
        annotationList = root.Annotations<MyAnnotation>();
        foreach (MyAnnotation ma in annotationList)
            Console.WriteLine(ma.Tag);
        Console.WriteLine("----");

        IEnumerable<string> stringAnnotationList;
        stringAnnotationList = root.Annotations<string>();
        foreach (string str in stringAnnotationList)
            Console.WriteLine(str);
    }
}

Public Class MyAnnotation
    Private _tag As String

    Property Tag() As String
        Get
            Return Me._tag
        End Get
        Set(ByVal Value As String)
            Me._tag = Value
        End Set
    End Property

    Public Sub New(ByVal tag As String)
        Me._tag = tag
    End Sub
End Class

Module Module1
    Sub Main()
        Dim root As XElement = <Root>content</Root>
        root.AddAnnotation(New MyAnnotation("T1"))
        root.AddAnnotation(New MyAnnotation("T2"))
        root.AddAnnotation("abc")
        root.AddAnnotation("def")

        Dim annotationList As IEnumerable(Of MyAnnotation)
        annotationList = root.Annotations(Of MyAnnotation)()
        For Each ma As MyAnnotation In annotationList
            Console.WriteLine(ma.Tag)
        Next
        Console.WriteLine("----")

        Dim stringAnnotationList As IEnumerable(Of String)
        stringAnnotationList = root.Annotations(Of String)()
        For Each str As String In stringAnnotationList
            Console.WriteLine(str)
        Next
    End Sub
End Module

此示例生成以下输出：

T1
T2
----
abc
def

另请参阅

适用于