Visual C++ .NET/XML/XmlReader
Содержание
Does it have attribute
<source lang="csharp">
- include "stdafx.h"
- using <system.xml.dll>
using namespace System; using namespace System::Xml; void main() {
XmlReader ^reader;
reader = XmlReader::Create("..\\Monsters.xml");
while (reader->Read()){
switch (reader->NodeType)
{
case XmlNodeType::Comment:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::Element:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
reader->MoveToElement();
}
if (reader->IsEmptyElement)
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
}
break;
case XmlNodeType::EndElement:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Text:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::XmlDeclaration:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
reader->MoveToElement();
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Whitespace:
break;
default:
Console::WriteLine("***UKNOWN*** node");
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
}
</source>
Load xml from file
<source lang="csharp">
- include "stdafx.h"
- using <system.xml.dll>
using namespace System; using namespace System::Xml; void main() {
XmlReader ^reader;
reader = XmlReader::Create("..\\Monsters.xml");
while (reader->Read()){
switch (reader->NodeType)
{
case XmlNodeType::Comment:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::Element:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
reader->MoveToElement();
}
if (reader->IsEmptyElement)
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
}
break;
case XmlNodeType::EndElement:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Text:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::XmlDeclaration:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
reader->MoveToElement();
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Whitespace:
break;
default:
Console::WriteLine("***UKNOWN*** node");
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
}
</source>
Output depth of element
<source lang="csharp">
- include "stdafx.h"
- using <system.xml.dll>
using namespace System; using namespace System::Xml; void main() {
XmlReader ^reader;
reader = XmlReader::Create("..\\Monsters.xml");
while (reader->Read()){
switch (reader->NodeType)
{
case XmlNodeType::Comment:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::Element:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
reader->MoveToElement();
}
if (reader->IsEmptyElement)
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
}
break;
case XmlNodeType::EndElement:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Text:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Value);
break;
case XmlNodeType::XmlDeclaration:
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
if (reader->HasAttributes)
{
while (reader->MoveToNextAttribute())
{
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
reader->MoveToElement();
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
break;
case XmlNodeType::Whitespace:
break;
default:
Console::WriteLine("***UKNOWN*** node");
Console::WriteLine(reader->Depth);
Console::WriteLine(reader->Name);
Console::WriteLine(reader->Value);
}
}
}
</source>
Set indent char for xml output
<source lang="csharp">
- include "stdafx.h"
- using <system.xml.dll>
using namespace System; using namespace System::Xml; void main() {
XmlReader ^reader;
XmlWriter ^writer;
try
{
reader = XmlReader::Create("a.xml");
XmlWriterSettings ^settings = gcnew XmlWriterSettings();
settings->Indent = true;
settings->IndentChars = (" ");
writer = XmlWriter::Create("New.xml", settings);
while (reader->Read())
{
switch (reader->NodeType)
{
case XmlNodeType::Comment:
writer->WriteComment(reader->Value);
break;
case XmlNodeType::Element:
writer->WriteStartElement(reader->Name);
writer->WriteAttributes(reader, false);
if (reader->IsEmptyElement)
writer->WriteEndElement();
break;
case XmlNodeType::EndElement:
writer->WriteEndElement();
if (reader->Name->Equals("Name"))
{
writer->WriteStartElement("A");
writer->WriteString("False");
writer->WriteEndElement();
}
break;
case XmlNodeType::Text:
writer->WriteString(reader->Value);
break;
case XmlNodeType::XmlDeclaration:
writer->WriteStartDocument();
break;
}
}
writer->Flush();
}
catch (Exception ^e)
{
Console::WriteLine("XML Update Aborted -- {0}", e->Message);
}
finally
{
if (writer->WriteState != WriteState::Closed)
{
writer->Close();
}
if (reader->ReadState != ReadState::Closed)
{
reader->Close();
}
}
}
</source>
Validate XML
<source lang="csharp">
- include "stdafx.h"
- using <system.xml.dll>
using namespace System; using namespace System::Xml; using namespace System::Xml::Schema; ref class ValidateXML { public:
ValidateXML(String ^filename)
{
XmlReader ^vreader;
try
{
XmlReaderSettings ^settings = gcnew XmlReaderSettings();
settings->ProhibitDtd = false;
settings->ValidationType = ValidationType::DTD;
vreader = XmlReader::Create(filename, settings);
while(vreader->Read())
{
// ... Process nodes just like XmlTextReader()
}
Console::WriteLine("Finished Processing");
}
catch (Exception ^e)
{
Console::WriteLine(e->Message);
}
finally
{
if (vreader->ReadState != ReadState::Closed)
{
vreader->Close();
}
}
}
}; void main() {
gcnew ValidateXML("Bad.xml");
gcnew ValidateXML("good.xml");
}
</source>
