Partilhar via

  • Artigo

XElement.GetPrefixOfNamespace Method

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

Gets the prefix associated with a namespace for this XElement.

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

Syntax

'Declaration
Public Function GetPrefixOfNamespace ( _
    ns As XNamespace _
) As String

public string GetPrefixOfNamespace(
    XNamespace ns
)

Parameters

Return Value

Type: System.String
A String that contains the namespace prefix.

Remarks

This method looks through the XML tree for namespace attributes that are in scope for this element. Namespace prefixes are specified in namespace attributes that are in the XML tree.

If the namespace is the default namespace, and there is no prefix for the namespace, then this method returns null.

Examples

The following example creates an XML tree that contains a namespace with a prefix. It then uses this method to retrieve the prefix for the namespace. Notice that this example uses the implicit conversion from string to XNamespace when calling this method.


'add the following line to the the Imports section:
'Imports <xmlns="https://www.adventure-works.com">
Dim output As New StringBuilder

Dim xmlTree As XElement = <aw:Root/>
Dim prefix As String = xmlTree.GetPrefixOfNamespace("https://www.adventure-works.com")
output.Append(String.Format("Prefix: {0}", prefix))
output.Append(Environment.NewLine)

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XElement xmlTree = XElement.Parse("<Root xmlns:aw='https://www.adventure-works.com'/>");
string prefix = xmlTree.GetPrefixOfNamespace("https://www.adventure-works.com");
output.Append("Prefix: " + prefix + 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.