XmlNamespaceManager.LookupNamespace(String) Method
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Gets the namespace URI for the specified prefix.
public:
virtual System::String ^ LookupNamespace(System::String ^ prefix);
public virtual string LookupNamespace (string prefix);
public virtual string? LookupNamespace (string prefix);
abstract member LookupNamespace : string -> string
override this.LookupNamespace : string -> string
Public Overridable Function LookupNamespace (prefix As String) As String
- prefix
- String
The prefix whose namespace URI you want to resolve. To match the default namespace, pass String.Empty.
The namespace URI for prefix
or null
if there is no mapped namespace. The returned string is atomized.
For more information on atomized strings, see the XmlNameTable class.
The following example adds prefix/namespace pairs to the XmlNamespaceManager, and then displays all the pairs in the collection.
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
public ref class Sample
{
public:
Sample()
{
// Create the XmlNamespaceManager.
NameTable^ nt = gcnew NameTable;
XmlNamespaceManager^ nsmgr = gcnew XmlNamespaceManager( nt );
// Add prefix/namespace pairs to the XmlNamespaceManager.
nsmgr->AddNamespace( "", "www.wideworldimporters.com" ); //Adds a default namespace.
nsmgr->AddNamespace( "europe", "www.wideworldimporters.com/europe" );
nsmgr->PushScope(); //Pushes a namespace scope on the stack.
nsmgr->AddNamespace( "", "www.lucernepublishing.com" ); //Adds another default namespace.
nsmgr->AddNamespace( "partners", "www.lucernepublishing.com/partners" );
Console::WriteLine( "Show all the prefix/namespace pairs in the XmlNamespaceManager..." );
ShowAllNamespaces( nsmgr );
}
private:
void ShowAllNamespaces( XmlNamespaceManager^ nsmgr )
{
do
{
System::Collections::IEnumerator^ myEnum = nsmgr->GetEnumerator();
while ( myEnum->MoveNext() )
{
String^ prefix = safe_cast<String^>(myEnum->Current);
Console::WriteLine( "Prefix={0}, Namespace={1}", prefix, nsmgr->LookupNamespace( prefix ) );
}
}
while ( nsmgr->PopScope() );
}
};
int main()
{
gcnew Sample;
}
using System;
using System.IO;
using System.Xml;
public class Sample
{
public static void Main()
{
Sample test = new Sample();
}
public Sample()
{
// Create the XmlNamespaceManager.
NameTable nt = new NameTable();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
// Add prefix/namespace pairs to the XmlNamespaceManager.
nsmgr.AddNamespace("", "www.wideworldimporters.com"); //Adds a default namespace.
nsmgr.AddNamespace("europe", "www.wideworldimporters.com/europe");
nsmgr.PushScope(); //Pushes a namespace scope on the stack.
nsmgr.AddNamespace("", "www.lucernepublishing.com"); //Adds another default namespace.
nsmgr.AddNamespace("partners", "www.lucernepublishing.com/partners");
Console.WriteLine("Show all the prefix/namespace pairs in the XmlNamespaceManager...");
ShowAllNamespaces(nsmgr);
}
private void ShowAllNamespaces(XmlNamespaceManager nsmgr)
{
do{
foreach (String prefix in nsmgr)
{
Console.WriteLine("Prefix={0}, Namespace={1}", prefix,nsmgr.LookupNamespace(prefix));
}
}
while (nsmgr.PopScope());
}
}
Option Explicit
Option Strict
Imports System.IO
Imports System.Xml
Public Class Sample
Public Shared Sub Main()
Dim test As New Sample()
End Sub
Public Sub New()
' Create the XmlNamespaceManager.
Dim nt As New NameTable()
Dim nsmgr As New XmlNamespaceManager(nt)
' Add prefix/namespace pairs to the XmlNamespaceManager.
nsmgr.AddNamespace("", "www.wideworldimporters.com") 'Adds a default namespace.
nsmgr.AddNamespace("europe", "www.wideworldimporters.com/europe")
nsmgr.PushScope() 'Pushes a namespace scope on the stack.
nsmgr.AddNamespace("", "www.lucernepublishing.com") 'Adds another default namespace.
nsmgr.AddNamespace("partners", "www.lucernepublishing.com/partners")
Console.WriteLine("Show all the prefix/namespace pairs in the XmlNamespaceManager...")
ShowAllNamespaces(nsmgr)
End Sub
Private Sub ShowAllNamespaces(nsmgr As XmlNamespaceManager)
Do
Dim prefix As String
For Each prefix In nsmgr
Console.WriteLine("Prefix={0}, Namespace={1}", prefix, nsmgr.LookupNamespace(prefix))
Next prefix
Loop While nsmgr.PopScope()
End Sub
End Class
Produit | Versions |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
UWP | 10.0 |
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