XObject.Annotation 方法

定义

重载

名称 说明
Annotation(Type)

从此 XObject获取指定类型的第一个批注对象。

Annotation<T>()

从此 XObject获取指定类型的第一个批注对象。

Annotation(Type)

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

从此 XObject获取指定类型的第一个批注对象。

public:
 System::Object ^ Annotation(Type ^ type);
public object Annotation(Type type);
public object? Annotation(Type type);
member this.Annotation : Type -> obj
Public Function Annotation (type As Type) As Object

参数

type
Type

要检索的批注的类型。

返回

Object包含与指定类型匹配的第一个批注对象,或者null没有批注属于指定类型。

示例

以下示例向 /> 添加注释。 然后,它会检索批注,指定要检索的类型。

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

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

        MyAnnotation ma2 = (MyAnnotation)root.Annotation(typeof(MyAnnotation));
        Console.WriteLine(ma2.Tag);
    }
}
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 ma As MyAnnotation = New MyAnnotation("T1")
        Dim root As XElement = <Root>content</Root>
        root.AddAnnotation(ma)

        Dim ma2 As MyAnnotation = DirectCast(root.Annotation(GetType(MyAnnotation)), MyAnnotation)
        Console.WriteLine(ma2.Tag)
    End Sub

End Module

此示例生成以下输出:

T1

另请参阅

适用于

Annotation<T>()

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

从此 XObject获取指定类型的第一个批注对象。

public:
generic <typename T>
 where T : class T Annotation();
public T Annotation<T>() where T : class;
public T? Annotation<T>() where T : class;
member this.Annotation : unit -> 'T (requires 'T : null)
Public Function Annotation(Of T As Class) () As T

类型参数

T

要检索的批注的类型。

返回

T

与指定类型匹配的第一个批注对象,或者 null 如果没有指定类型的批注。

示例

下面的示例向元素添加批注,然后通过此方法检索该批注。

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

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

        MyAnnotation ma2 = root.Annotation<MyAnnotation>();
        Console.WriteLine(ma2.Tag);
    }
}
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 ma As MyAnnotation = New MyAnnotation("T1")
        Dim root As XElement = <Root>content</Root>
        root.AddAnnotation(ma)

        Dim ma2 As MyAnnotation = root.Annotation(Of MyAnnotation)()
        Console.WriteLine(ma2.Tag)
    End Sub
End Module

此示例生成以下输出:

T1

另请参阅

适用于