Artigo
11/18/2011

XAttribute.IsNamespaceDeclaration Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Determines if this attribute is a namespace declaration.

Namespace: System.Xml.Linq
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)

Syntax

'Declaration
Public ReadOnly Property IsNamespaceDeclaration As Boolean

public bool IsNamespaceDeclaration { get; }

Property Value

Type: System.Boolean
true if this attribute is a namespace declaration; otherwise false.

Remarks

Technically, in XML, namespace declarations are not attributes proper. However, this distinction is not normally made by most XML programmers. Instead, because namespace declarations have exactly the same syntax as attributes, most XML programmers think of namespaces as attributes. To simplify the LINQ to XML programming interface, namespaces are represented in the XML tree as attributes. You can use this property to determine if a particular LINQ to XML attribute is really a namespace declaration.

Examples

The following example creates an attribute that is a namespace declaration and an attribute that is not. It then uses this property to display whether each attribute is a namespace declaration or not.

Dim output As New StringBuilder
Dim root As XElement = <aw:Root xmlns:aw='https://www.adventure-works.com'
                           aw:Att='content'/>

For Each att As XAttribute In root.Attributes()
    If (att.IsNamespaceDeclaration) Then
        output.Append(String.Format("{0} is a namespace declaration", att.Name))
        output.Append(Environment.NewLine)
    Else
        output.Append(String.Format("{0} is not a namespace declaration", att.Name))
        output.Append(Environment.NewLine)
    End If
Next

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XNamespace aw = "https://www.adventure-works.com";
XElement root = new XElement(aw + "Root",
    new XAttribute(XNamespace.Xmlns + "aw", "https://www.adventure-works.com"),
    new XAttribute(aw + "Att", "content")
);

foreach (XAttribute att in root.Attributes())
{
    if (att.IsNamespaceDeclaration)
        output.Append(att.Name + " is a namespace declaration" + Environment.NewLine);
    else
        output.Append(att.Name + " is not a namespace declaration" + Environment.NewLine);
}

OutputTextBlock.Text = output.ToString();

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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