Разбор XML файла с применением классов на C++/CLI

Продолжаем статью Пример разбора XML файла в Visual Studio 2015 на C++.

В статье не будет особо комментариев и подробностей ввиду определенных причин.

Содержание

XML файл
Постановка задачи
Интерфейс программы
Классы
Подготовка формы
Коды кнопок
Запуск приложения

XML файл

<?xml version="1.0" encoding="UTF-8" ?>
<points name="Example">
    <point type="circle">
        <x>2</x>
        <y>3</y>
		<name>Point 1</name>
    </point>
    <point type="circle">
        <x>1</x>
        <y>5</y>
		<name>Point of cat</name>
    </point>
    <point type="square">
        <x>12</x>
        <y>-3</y>
		<name>Point 3</name>
    </point>
</points>

<?xml version="1.0" encoding="UTF-8" ?>

<name>Point 1</name>

</point>

<name>Point of cat</name>

</point>

<name>Point 3</name>

</point>

</points>

Постановка задачи

У нас должно быть три класса.

Абстрактный класс, описывающий точку в двумерном пространстве.
Более расширенный класс, который описывает точку с именем и типом.
Класс, содержащий массив точек, которые считываются из XML файла.

Также кроме загрузки файла, мы должны иметь возможность обработать данные, например, отфильтровать их.

Писать будем в Visual Studio 2015 под С++/CLI приложение CLR.

Интерфейс программы

Классы

Point.h

#pragma once

using namespace System;

ref class Point {
public:
	Point();
	Point(int x, int y);
	void setX(int x);
	int getX();
	void setY(int x);
	int getY();
	virtual String^ getInfo() = 0;
protected:
	int x;
	int y;
};

Point::Point() {
	x = 0;
	y = 0;
}

Point::Point(int x, int y) {
	this->x = x;
	this->y = y;
}

void Point::setX(int x) {
	this->x = x;
}

int Point::getX() {
	return x;
}

void Point::setY(int y) {
	this->y = y;
}

int Point::getY() {
	return y;
}

#pragma once

using namespace System;

ref class Point {

public:

Point();

Point(int x, int y);

void setX(int x);

int getX();

void setY(int x);

int getY();

virtual String^ getInfo() = 0;

protected:

int x;

int y;

};

Point::Point() {

x = 0;

y = 0;

}

Point::Point(int x, int y) {

this->x = x;

this->y = y;

}

void Point::setX(int x) {

this->x = x;

}

int Point::getX() {

return x;

}

void Point::setY(int y) {

this->y = y;

}

int Point::getY() {

return y;

}

PointWithName.h

#pragma once

#include "Point.h"

using namespace System;

ref class PointWithName: Point {
public:
	PointWithName();
	PointWithName(int x, int y);
	String^ getInfo() override;
	String^ getName();
	void setName(String^ name);
	String^ getType();
	void setType(String^ name);
protected:
	String^ type;
	String^ name;
};

PointWithName::PointWithName() {
	x = 0;
	y = 0;
}

PointWithName::PointWithName(int x, int y) {
	this->x = x;
	this->y = y;
}
String^ PointWithName::getInfo() {
	String^ text;

	text += "Name = " + name + "\r\n";
	text += "Type = " + type + "\r\n";
	text += "(" + Convert::ToString(x) + "; " + Convert::ToString(y) + ")\r\n";

	return text;
}

String^ PointWithName::getName() {
	return name;
}

void PointWithName::setName(String^ name) {
	this->name = name;
}

String^ PointWithName::getType() {
	return type;
}

void PointWithName::setType(String^ type) {
	this->type = type;
}

#pragma once

#include "Point.h"

using namespace System;

ref class PointWithName: Point {

public:

PointWithName();

PointWithName(int x, int y);

String^ getInfo() override;

String^ getName();

void setName(String^ name);

String^ getType();

void setType(String^ name);

protected:

String^ type;

String^ name;

};

PointWithName::PointWithName() {

x = 0;

y = 0;

}

PointWithName::PointWithName(int x, int y) {

this->x = x;

this->y = y;

}

String^ PointWithName::getInfo() {

String^ text;

text += "Name = " + name + "\r\n";

text += "Type = " + type + "\r\n";

text += "(" + Convert::ToString(x) + "; " + Convert::ToString(y) + ")\r\n";

return text;

}

String^ PointWithName::getName() {

return name;

}

void PointWithName::setName(String^ name) {

this->name = name;

}

String^ PointWithName::getType() {

return type;

}

void PointWithName::setType(String^ type) {

this->type = type;

}

Points.h

#pragma once

#include "PointWithName.h"
#include <cliext/vector> 

using namespace System;
using namespace System::Xml;
using namespace cliext;

ref class Points {
public:
	Points ();
	Points (String^ fileName);
	int size ();
	void setFileName(String^ fileName);
	PointWithName^ getElement(int i);
	String^ getInfo ();
	String^ getInfoWithFilterByX (int filter);
	String^ getInfoWithFilterByName(String^ filter);
private:
	vector<PointWithName^>^ vectorPoints;
	void readXML(String^ fileName);
};

Points::Points() {
	vectorPoints = gcnew vector<PointWithName^>();
}

Points::Points(String^ fileName) {
	vectorPoints = gcnew vector<PointWithName^>();

	readXML(fileName);
}

void Points::setFileName(String^ fileName) {
	vectorPoints->clear();

	readXML(fileName);
}

void Points::readXML(String^ fileName) {
	PointWithName^ temp;

	XmlTextReader reader(fileName);

	while (reader.ReadToFollowing("points")) {
		int pointCount = 0;

		if (reader.ReadToDescendant("point")) {
			do {
				pointCount++;

				int x, y;
				String^ type;
				String^ name;

				type = reader.GetAttribute("type");

				XmlReader^ inner = reader.ReadSubtree();

				while (inner->Read()) {
					if ((inner->Name == "x") && (inner->NodeType == XmlNodeType::Element)) {
						inner->Read();
						x = Convert::ToInt32(inner->Value);
					}
					if ((inner->Name == "y") && (inner->NodeType == XmlNodeType::Element)) {
						inner->Read();
						y = Convert::ToInt32(inner->Value);
					}
					if ((inner->Name == "name") && (inner->NodeType == XmlNodeType::Element)) {
						inner->Read();
						name = inner->Value;
					}
				}

				temp = gcnew PointWithName(x, y);
				temp->setType(type);
				temp->setName(name);

				vectorPoints->push_back(temp);

			} while (reader.ReadToNextSibling("point"));
		}
	}
}

int Points::size() {
	return vectorPoints->size();
}

PointWithName^ Points::getElement(int i) {
	return vectorPoints->at(i);
}

String^ Points::getInfo() {
	String^ info;

	for (int i = 0; i < vectorPoints->size(); i++) {
		info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";
		info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";
		info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";
	}

	return info;
}

String^ Points::getInfoWithFilterByX(int filter) {
	String^ info;

	if (vectorPoints->size() == 0)
		return "File is not loaded\r\n";

	int findCount = 0;
	for (int i = 0; i < vectorPoints->size(); i++) {
		if (vectorPoints->at(i)->getX() == filter) {
			info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";
			info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";
			info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";
			findCount++;
		}
	}

	if (findCount == 0)
		info += "Such points are not found\r\n";

	return info;
}

String^ Points::getInfoWithFilterByName(String^ filter) {
	String^ info;

	if (vectorPoints->size() == 0)
		return "File is not loaded\r\n";

	int findCount = 0;
	for (int i = 0; i < vectorPoints->size(); i++) {
		if (vectorPoints->at(i)->getName()->IndexOf(filter) >= 0) {
			info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";
			info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";
			info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";
			findCount++;
		}
	}

	if (findCount == 0)
		info += "Such points are not found\r\n";

	return info;
}

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#pragma once

#include "PointWithName.h"

#include <cliext/vector>

using namespace System;

using namespace System::Xml;

using namespace cliext;

ref class Points {

public:

Points ();

Points (String^ fileName);

int size ();

void setFileName(String^ fileName);

PointWithName^ getElement(int i);

String^ getInfo ();

String^ getInfoWithFilterByX (int filter);

String^ getInfoWithFilterByName(String^ filter);

private:

vector<PointWithName^>^ vectorPoints;

void readXML(String^ fileName);

};

Points::Points() {

vectorPoints = gcnew vector<PointWithName^>();

}

Points::Points(String^ fileName) {

vectorPoints = gcnew vector<PointWithName^>();

readXML(fileName);

}

void Points::setFileName(String^ fileName) {

vectorPoints->clear();

readXML(fileName);

}

void Points::readXML(String^ fileName) {

PointWithName^ temp;

XmlTextReader reader(fileName);

while (reader.ReadToFollowing("points")) {

int pointCount = 0;

if (reader.ReadToDescendant("point")) {

do {

pointCount++;

int x, y;

String^ type;

String^ name;

type = reader.GetAttribute("type");

XmlReader^ inner = reader.ReadSubtree();

while (inner->Read()) {

if ((inner->Name == "x") && (inner->NodeType == XmlNodeType::Element)) {

inner->Read();

x = Convert::ToInt32(inner->Value);

}

if ((inner->Name == "y") && (inner->NodeType == XmlNodeType::Element)) {

inner->Read();

y = Convert::ToInt32(inner->Value);

}

if ((inner->Name == "name") && (inner->NodeType == XmlNodeType::Element)) {

inner->Read();

name = inner->Value;

}

temp = gcnew PointWithName(x, y);

temp->setType(type);

temp->setName(name);

vectorPoints->push_back(temp);

} while (reader.ReadToNextSibling("point"));

}

int Points::size() {

return vectorPoints->size();

}

PointWithName^ Points::getElement(int i) {

return vectorPoints->at(i);

}

String^ Points::getInfo() {

String^ info;

for (int i = 0; i < vectorPoints->size(); i++) {

info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";

info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";

info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";

}

return info;

}

String^ Points::getInfoWithFilterByX(int filter) {

String^ info;

if (vectorPoints->size() == 0)

return "File is not loaded\r\n";

int findCount = 0;

for (int i = 0; i < vectorPoints->size(); i++) {

if (vectorPoints->at(i)->getX() == filter) {

info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";

info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";

info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";

findCount++;

}

if (findCount == 0)

info += "Such points are not found\r\n";

return info;

}

String^ Points::getInfoWithFilterByName(String^ filter) {

String^ info;

if (vectorPoints->size() == 0)

return "File is not loaded\r\n";

int findCount = 0;

for (int i = 0; i < vectorPoints->size(); i++) {

if (vectorPoints->at(i)->getName()->IndexOf(filter) >= 0) {

info += "Name = " + vectorPoints->at(i)->getName() + "\r\n";

info += "Type = " + vectorPoints->at(i)->getType() + "\r\n";

info += "(" + vectorPoints->at(i)->getX() + "; " + vectorPoints->at(i)->getY() + ")\r\n\r\n";

findCount++;

}

if (findCount == 0)

info += "Such points are not found\r\n";

return info;

}

Подготовка формы

В файле формы (у меня это MyForm.h) подключите файл третьего класса.

#include "Points.h"

1	#include "Points.h"

А в переменных формы добавьте указатель на класс Points.

Points^ pointsFromXML;

1	Points^ pointsFromXML;

Коды кнопок

Кнопка Load XML.

if (openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK) {
	textBox2->Clear();
	String^ fileName = openFileDialog1->FileName;

	pointsFromXML = gcnew Points(fileName);

	textBox2->Text += "Amount of points = ";
	textBox2->Text += Convert::ToString(pointsFromXML->size()) + "\r\n";
	textBox2->Text += pointsFromXML->getInfo() + "\r\n";
}

if (openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK) {

textBox2->Clear();

String^ fileName = openFileDialog1->FileName;

pointsFromXML = gcnew Points(fileName);

textBox2->Text += "Amount of points = ";

textBox2->Text += Convert::ToString(pointsFromXML->size()) + "\r\n";

textBox2->Text += pointsFromXML->getInfo() + "\r\n";

}

Кнопка Filter by x.

if (pointsFromXML != nullptr) {
	textBox2->Clear();
	int filter = 0;
	Int32::TryParse(textBox1->Text, filter);

	textBox2->Text += pointsFromXML->getInfoWithFilterByX(filter);
}
else
	textBox2->Text = "File is not loaded\r\n";

if (pointsFromXML != nullptr) {

textBox2->Clear();

int filter = 0;

Int32::TryParse(textBox1->Text, filter);

textBox2->Text += pointsFromXML->getInfoWithFilterByX(filter);

}

else

textBox2->Text = "File is not loaded\r\n";

Кнопка Filter by name.

if (pointsFromXML != nullptr) {
	textBox2->Clear();
	String^ filter = textBox3->Text;

	textBox2->Text += pointsFromXML->getInfoWithFilterByName(filter);
}
else
	textBox2->Text = "File is not loaded\r\n";

if (pointsFromXML != nullptr) {

textBox2->Clear();

String^ filter = textBox3->Text;

textBox2->Text += pointsFromXML->getInfoWithFilterByName(filter);

}

else

textBox2->Text = "File is not loaded\r\n";

Кнопка All info.

if (pointsFromXML != nullptr) {
	textBox2->Clear();

	textBox2->Text += "Amount of points = ";
	textBox2->Text += Convert::ToString(pointsFromXML->size()) + "\r\n";
	textBox2->Text += pointsFromXML->getInfo() + "\r\n";
}
else
	textBox2->Text = "File is not loaded\r\n";

if (pointsFromXML != nullptr) {

textBox2->Clear();

textBox2->Text += "Amount of points = ";

textBox2->Text += Convert::ToString(pointsFromXML->size()) + "\r\n";

textBox2->Text += pointsFromXML->getInfo() + "\r\n";

}

else

textBox2->Text = "File is not loaded\r\n";

Запуск приложения

При запуске приложения и открытии XML файла мы можем получать информацию по точкам или их фильтровать.

Разбор XML файла с применением классов на C++/CLI

Содержание

XML файл

Постановка задачи

Интерфейс программы

Классы

Подготовка формы

Коды кнопок

Запуск приложения

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