XObject.RemoveAnnotations 方法

定义

命名空间:

System.Xml.Linq

程序集:

System.Xml.XDocument.dll

程序集:

System.Xml.Linq.dll

程序集:

netstandard.dll

重载

RemoveAnnotations(Type)	从此 XObject 移除指定类型的批注。
RemoveAnnotations<T>()	从此 XObject 移除指定类型的批注。

RemoveAnnotations(Type)

从此 XObject 移除指定类型的批注。

public:
 void RemoveAnnotations(Type ^ type);

public void RemoveAnnotations (Type type);

member this.RemoveAnnotations : Type -> unit

Public Sub RemoveAnnotations (type As Type)

参数

type

Type

要移除的批注的类型。

示例

以下示例创建一个具有四个批注的元素。 然后，它使用此方法删除其中两个。

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");  

        Console.WriteLine("Count before removing: {0}", root.Annotations<object>().Count());  
        root.RemoveAnnotations(typeof(MyAnnotation));  
        Console.WriteLine("Count after removing: {0}", root.Annotations<object>().Count());  
    }  
}  

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")  

        Console.WriteLine("Count before removing: {0}", root.Annotations(Of Object)().Count())  
        root.RemoveAnnotations(GetType(MyAnnotation))  
        Console.WriteLine("Count after removing: {0}", root.Annotations(Of Object)().Count())  
    End Sub  
End Module  

该示例产生下面的输出：

Count before removing: 4  
Count after removing: 2  

另请参阅

• LINQ to XML 概述

RemoveAnnotations<T>()

从此 XObject 移除指定类型的批注。

public:
generic <typename T>
 where T : class void RemoveAnnotations();

public void RemoveAnnotations<T> () where T : class;

member this.RemoveAnnotations : unit -> unit (requires 'T : null)

Public Sub RemoveAnnotations(Of T As Class) ()

类型参数

T

要移除的批注的类型。

示例

以下示例创建一个具有四个批注的元素。 然后，它使用此方法删除其中两个。

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");  

        Console.WriteLine("Count before removing: {0}", root.Annotations<object>().Count());  
        root.RemoveAnnotations<MyAnnotation>();  
        Console.WriteLine("Count after removing: {0}", root.Annotations<object>().Count());  
    }  
}  

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")  

        Console.WriteLine("Count before removing: {0}", root.Annotations(Of Object)().Count())  
        root.RemoveAnnotations(Of MyAnnotation)()  
        Console.WriteLine("Count after removing: {0}", root.Annotations(Of Object)().Count())  
    End Sub  
End Module  

该示例产生下面的输出：

Count before removing: 4  
Count after removing: 2  

另请参阅

• LINQ to XML 概述