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C# 寫入XML文檔三種方法詳細介紹

三個類将同樣的xml内容寫入文檔,介紹了如何使用XmlDocument類對XML進行操作,以及如何使用LINQ to XML對XML進行操作。

它們分别使用了XmlDocument類和XDocument類。

在本文中,我再介紹一個類,XmlTextWriter。我們分别用這三個類将同樣的xml内容寫入文檔,看一看哪種寫法最直覺、簡便。 

我們要寫入的XML文檔内容為 

代碼如下:

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

<Contacts>

<Contact id="01">

<Name>Daisy Abbey</Name>

<Gender>female</Gender>

</Contact>

</Contacts>

(1)使用XmlDocument類:

代碼如下:

var xmlDoc = new XmlDocument();

//Create the xml declaration first

xmlDoc.AppendChild(xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null));

//Create the root node and append into doc

var el = xmlDoc.CreateElement("Contacts");

xmlDoc.AppendChild(el);

// Contact

XmlElement elementContact = xmlDoc.CreateElement("Contact");

XmlAttribute attrID = xmlDoc.CreateAttribute("id");

attrID.Value = "01";

elementContact.Attributes.Append(attrID);

el.AppendChild(elementContact);

// Contact Name

XmlElement elementName = xmlDoc.CreateElement("Name");

elementName.InnerText = "Daisy Abbey";

elementContact.AppendChild(elementName);

// Contact Gender

XmlElement elementGender = xmlDoc.CreateElement("Gender");

elementGender.InnerText = "female";

elementContact.AppendChild(elementGender);

xmlDoc.Save("test1.xml");

(2)使用LINQ to XML 的XDocument類:

代碼如下:

var doc = new XDocument(

new XElement("Contacts", new XElement("Contact", new XAttribute("id", "01"), new XElement("Name", "Daisy Abbey"), new XElement("Gender", "female") ) ));

doc.Save("test2.xml");

(3) 使用XmlTextWriter類:

代碼如下:

String filename = String.Concat("test3.xml");

using (StreamWriter sw = new StreamWriter(filename))

{

// Create Xml Writer.

XmlTextWriter xmlWriter = new XmlTextWriter(sw);

// 也可以使用public XmlTextWriter(string filename, Encoding encoding)來構造

// encoding預設為 UTF-8.

//XmlTextWriter writer = new XmlTextWriter("test3.xml", null);

// Set indenting so that its easier to read XML when open in Notepad and such apps.

xmlWriter.Formatting = Formatting.Indented;

// This will output the XML declaration

xmlWriter.WriteStartDocument();

xmlWriter.WriteStartElement("Contacts");

xmlWriter.WriteStartElement("Contact");

xmlWriter.WriteAttributeString("id", "01");

xmlWriter.WriteElementString("Name", "Daisy Abbey");

xmlWriter.WriteElementString("Gender", "female");

// close contact </contact>

xmlWriter.WriteEndElement();

// close contacts </contact>

xmlWriter.WriteEndElement();

xmlWriter.WriteEndDocument();

xmlWriter.Close();

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