XmlTextReader.WhitespaceHandling Propriedade
Importante
Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.
Obtém ou define um valor que especifica como o espaço em branco é tratado.
public:
property System::Xml::WhitespaceHandling WhitespaceHandling { System::Xml::WhitespaceHandling get(); void set(System::Xml::WhitespaceHandling value); };
public System.Xml.WhitespaceHandling WhitespaceHandling { get; set; }
member this.WhitespaceHandling : System.Xml.WhitespaceHandling with get, set
Public Property WhitespaceHandling As WhitespaceHandling
Um dos valores de WhitespaceHandling. O padrão é WhitespaceHandling.All
(retorna os nós Whitespace
e SignificantWhitespace
).
Valor inválido especificado.
Definir essa propriedade quando o leitor é fechado (ReadState é ReadState.Closed
).
O exemplo a seguir lê um fragmento XML.
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
void ReadXML( XmlParserContext^ context, String^ xmlFrag, WhitespaceHandling ws )
{
//Create the reader and specify the WhitespaceHandling setting.
XmlTextReader^ reader = gcnew XmlTextReader( xmlFrag,XmlNodeType::Element,context );
reader->WhitespaceHandling = ws;
//Parse the XML and display each of the nodes.
while ( reader->Read() )
{
switch ( reader->NodeType )
{
case XmlNodeType::Element:
Console::WriteLine( "{0}: <{1}>", reader->NodeType, reader->Name );
break;
case XmlNodeType::Text:
Console::WriteLine( "{0}: {1}", reader->NodeType, reader->Value );
break;
case XmlNodeType::EndElement:
Console::WriteLine( "{0}: </{1}>", reader->NodeType, reader->Name );
break;
case XmlNodeType::Whitespace:
Console::WriteLine( "{0}:", reader->NodeType );
break;
case XmlNodeType::SignificantWhitespace:
Console::WriteLine( "{0}:", reader->NodeType );
break;
}
}
//Close the reader.
reader->Close();
}
int main()
{
//Create the XML fragment to be parsed.
String^ xmlFrag = "<book> "
" <title>Pride And Prejudice</title>"
" <genre>novel</genre>"
"</book>";
//Create the XmlNamespaceManager.
NameTable^ nt = gcnew NameTable;
XmlNamespaceManager^ nsmgr = gcnew XmlNamespaceManager( nt );
//Create the XmlParserContext.
XmlParserContext^ context = gcnew XmlParserContext( nullptr,nsmgr,nullptr,XmlSpace::Default );
Console::WriteLine( "Read the XML and ignore all white space..." );
ReadXML( context, xmlFrag, WhitespaceHandling::None );
Console::WriteLine( "\r\nRead the XML including white space nodes..." );
ReadXML( context, xmlFrag, WhitespaceHandling::All );
}
using System;
using System.IO;
using System.Xml;
public class Sample
{
public static void Main(){
//Create the XML fragment to be parsed.
string xmlFrag ="<book> " +
" <title>Pride And Prejudice</title>" +
" <genre>novel</genre>" +
"</book>";
//Create the XmlNamespaceManager.
NameTable nt = new NameTable();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);
//Create the XmlParserContext.
XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.Default);
Console.WriteLine("Read the XML and ignore all white space...");
ReadXML(context, xmlFrag, WhitespaceHandling.None);
Console.WriteLine("\r\nRead the XML including white space nodes...");
ReadXML(context, xmlFrag, WhitespaceHandling.All);
}
public static void ReadXML(XmlParserContext context, string xmlFrag, WhitespaceHandling ws){
//Create the reader and specify the WhitespaceHandling setting.
XmlTextReader reader = new XmlTextReader(xmlFrag, XmlNodeType.Element, context);
reader.WhitespaceHandling = ws;
//Parse the XML and display each of the nodes.
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
Console.WriteLine("{0}: <{1}>", reader.NodeType, reader.Name);
break;
case XmlNodeType.Text:
Console.WriteLine("{0}: {1}", reader.NodeType, reader.Value);
break;
case XmlNodeType.EndElement:
Console.WriteLine("{0}: </{1}>", reader.NodeType, reader.Name);
break;
case XmlNodeType.Whitespace:
Console.WriteLine("{0}:", reader.NodeType);
break;
case XmlNodeType.SignificantWhitespace:
Console.WriteLine("{0}:", reader.NodeType);
break;
}
}
//Close the reader.
reader.Close();
}
} // End class
Imports System.IO
Imports System.Xml
public class Sample
public shared sub Main()
'Create the XML fragment to be parsed.
Dim xmlFrag as string ="<book> " & _
" <title>Pride And Prejudice</title>" & _
" <genre>novel</genre>" & _
"</book>"
'Create the XmlNamespaceManager.
Dim nt as NameTable = new NameTable()
Dim nsmgr as XmlNamespaceManager = new XmlNamespaceManager(nt)
'Create the XmlParserContext.
Dim context as XmlParserContext = new XmlParserContext(nothing, nsmgr, nothing, XmlSpace.Default)
Console.WriteLine("Read the XML and ignore all white space...")
ReadXML(context, xmlFrag, WhitespaceHandling.None)
Console.WriteLine()
Console.WriteLine("Read the XML including white space nodes...")
ReadXML(context, xmlFrag, WhitespaceHandling.All)
end sub
public shared sub ReadXML(context as XmlParserContext, xmlFrag as string, ws as WhitespaceHandling)
'Create the reader and specify the WhitespaceHandling setting.
Dim reader as XmlTextReader = new XmlTextReader(xmlFrag, XmlNodeType.Element, context)
reader.WhitespaceHandling = ws
'Parse the XML and display each of the nodes.
while (reader.Read())
select case reader.NodeType
case XmlNodeType.Element:
Console.WriteLine("{0}: <{1}>", reader.NodeType, reader.Name)
case XmlNodeType.Text:
Console.WriteLine("{0}: {1}", reader.NodeType, reader.Value)
case XmlNodeType.EndElement:
Console.WriteLine("{0}: </{1}>", reader.NodeType, reader.Name)
case XmlNodeType.Whitespace:
Console.WriteLine("{0}:", reader.NodeType)
case XmlNodeType.SignificantWhitespace:
Console.WriteLine("{0}:", reader.NodeType)
end select
end while
'Close the reader.
reader.Close()
end sub
end class
Observação
A partir do .NET Framework 2.0, recomendamos que você crie XmlReader instâncias usando o XmlReader.Create método para aproveitar a nova funcionalidade.
Essa propriedade pode ser alterada a qualquer momento e entra em vigor na próxima operação de leitura.
Como o XmlTextReader
não tem informações de DTD disponíveis para ele, SignificantWhitespace
os nós só são retornados dentro de um xml:space='preserve'
escopo.
Produto | Versões |
---|---|
.NET | 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 | 2.0, 2.1 |
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