Artículo
11/18/2011

XmlNamespaceManager Class

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

Resolves, adds, and removes namespaces to a collection and provides scope management for these namespaces.

Inheritance Hierarchy

System.Object
System.Xml.XmlNamespaceManager
System.Xml.Xsl.XsltContext

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

Syntax

'Declaration
Public Class XmlNamespaceManager _
    Implements IXmlNamespaceResolver, IEnumerable

public class XmlNamespaceManager : IXmlNamespaceResolver, 
    IEnumerable

The XmlNamespaceManager type exposes the following members.

Constructors

	Name	Description
	XmlNamespaceManager	Initializes a new instance of the XmlNamespaceManager class with the specified XmlNameTable.

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Properties

	Name	Description
	DefaultNamespace	Gets the namespace URI for the default namespace.
	NameTable	Gets the XmlNameTable associated with this object.

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Methods

	Name	Description
	AddNamespace	Adds the given namespace to the collection.
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetEnumerator	Returns an enumerator to use to iterate through the namespaces in the XmlNamespaceManager.
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetNamespacesInScope	Gets a collection of namespace names keyed by prefix which can be used to enumerate the namespaces currently in scope.
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	HasNamespace	Gets a value indicating whether the supplied prefix has a namespace defined for the current pushed scope.
	LookupNamespace	Gets the namespace URI for the specified prefix.
	LookupPrefix	Finds the prefix declared for the given namespace URI.
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	PopScope	Pops a namespace scope off the stack.
	PushScope	Pushes a namespace scope onto the stack.
	RemoveNamespace	Removes the given namespace for the given prefix.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Extension Methods

	Name	Description
	AsQueryable	Converts an IEnumerable to an IQueryable. (Defined by Queryable.)
	Cast<TResult>	Converts the elements of an IEnumerable to the specified type. (Defined by Enumerable.)
	OfType<TResult>	Filters the elements of an IEnumerable based on a specified type. (Defined by Enumerable.)

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Remarks

XmlNamespaceManager stores prefixes and namespaces as strings.

Examples

Dim output As New StringBuilder()

Dim xmlFrag As String = _
      "<root>" & _
        "<data>" & _
         "<items>" & _
          "<item id='1'>" & _
          "</item>" & _
         "</items>" & _
        "</data>" & _
        "</root>"

Using reader As XmlReader = XmlReader.Create(New StringReader(xmlFrag))
    Dim nsmanager As New XmlNamespaceManager(reader.NameTable)
    nsmanager.AddNamespace("msbooks", "www.microsoft.com/books")
    nsmanager.PushScope()
    nsmanager.AddNamespace("msstore", "www.microsoft.com/store")

    Dim prefix As String
    For Each prefix In nsmanager
        output.AppendLine(("Prefix" + prefix + _
                           " Namespace=" + nsmanager.LookupNamespace(prefix)))
    Next prefix
End Using
OutputTextBlock.Text = output.ToString()


                StringBuilder output = new StringBuilder();

                // Create the string containing the XML to read.
                String xmlFrag =
                    @"<root>
                        <data>
                            <items>
                                <item id='1'>
                                </item>
                            </items>
                        </data>
                        </root>";

                using (XmlReader reader = XmlReader.Create(new StringReader(xmlFrag)))
                {
                    XmlNamespaceManager nsmanager = new XmlNamespaceManager(reader.NameTable);
                    nsmanager.AddNamespace("msbooks", "www.microsoft.com/books");
                    nsmanager.PushScope();
                    nsmanager.AddNamespace("msstore", "www.microsoft.com/store");

                    foreach (String prefix in nsmanager)
                    {
                        output.AppendLine("Prefix" + prefix + " Namespace=" +
                            nsmanager.LookupNamespace(prefix));
                    }
                }
                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.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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