使用XmlWriter写Xml

假定创建了XmlWriter的实例变量xmlWriter，下文中将使用此实例变量写Xml

1.如何使用XmlWriter写Xml文档声明

// WriteStartDocument方法可以接受一个bool参数（表示standalone，是否为独立文档）或者不指定参数standalone保持默认值

xmlWriter.WriteStartDocument( false | true );

注意在使用WriteStartDocument方法后最好调用xmlWrite.WriteEndDocument()方法来关闭所有可能未关闭标签
2.如何使用XmlWriter写xml节点以及属性

//写节点

xmlWriter.WriteStartElement( "cat" );

//给节点添加属性

xmlWriter.WriteAttributeString( "color" , "white" );

//给节点内部添加文本

xmlWriter.WriteString( "I'm a cat" );

xmlWriter.WriteEndElement();

或者通过WriteElementString(string,string)方法写xml节点同时写下节点值，如下

//通过WriteElementString可以添加一个节点同时添加节点内容

xmlWriter.WriteElementString( "pig" , "pig is great" );

3.如何写CData

xmlWriter.WriteStartElement( "dog" );

//写CData

xmlWriter.WriteCData( "<strong>dog is dog</strong>" );

xmlWriter.WriteEndElement();

4.如何使用XmlWriter添加注释

xmlWriter.WriteComment( "this is an example writed by 玉开技术博客 http://www.cnblogs.com/yukaizhao " );

5.如何设置XmlWriter的输出格式，解决输出UTF-16问题
设置xml输出格式，需要通过XmlWriterSettings类，如下代码

XmlWriterSettings settings = new XmlWriterSettings();

//要求缩进

settings.Indent = true ;

//注意如果不设置encoding默认将输出utf-16

//注意这儿不能直接用Encoding.UTF8如果用Encoding.UTF8将在输出文本的最前面添加4个字节的非xml内容

settings.Encoding = new UTF8Encoding( false );

//设置换行符

settings.NewLineChars = Environment.NewLine;

完整的代码示例如下：

/*玉开技术博客 http://www.cnblogs.com/yukaizhao */

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using System.Xml;

namespace UseXmlWriter

{

class Program

{

static void Main( string [] args)

using (MemoryStream ms = new MemoryStream())

{

XmlWriterSettings settings = new XmlWriterSettings();

//要求缩进

settings.Indent = true ;

//注意如果不设置encoding默认将输出utf-16

//注意这儿不能直接用Encoding.UTF8如果用Encoding.UTF8将在输出文本的最前面添加4个字节的非xml内容

settings.Encoding = false );

//设置换行符

settings.NewLineChars = Environment.NewLine;

using (XmlWriter xmlWriter = XmlWriter.Create(ms,settings))

{

//写xml文件开始<?xml version="1.0" encoding="utf-8" ?>

xmlWriter.WriteStartDocument( //写根节点

xmlWriter.WriteStartElement( "root" );

//写字节点

xmlWriter.WriteStartElement( "cat" );

//给节点添加属性

xmlWriter.WriteAttributeString( "color" ,0)!important; background:none!important">//给节点内部添加文本

xmlWriter.WriteString( "I'm a cat" );

xmlWriter.WriteEndElement();

//通过WriteElementString可以添加一个节点同时添加节点内容

xmlWriter.WriteElementString( "pig" , "pig is great" );

xmlWriter.WriteStartElement( "dog" );

//写CData

xmlWriter.WriteCData( "<strong>dog is dog</strong>" );

xmlWriter.WriteComment( "this is an example writed by 玉开技术博客 http://www.cnblogs.com/yukaizhao " );

xmlWriter.WriteEndElement();

xmlWriter.WriteEndDocument();

}

//将xml内容输出到控制台中

string xml = Encoding.UTF8.GetString(ms.ToArray());

Console.WriteLine(xml);

}

Console.Read();

}

原文链接：https://www.f2er.com/xml/294927.html

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