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 http://www.baidu.com/"
);
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:
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 =
new
UTF8Encoding(
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(
false
);
//写根节点
xmlWriter.WriteStartElement(
"root"
);
//写字节点
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();
//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.WriteEndElement();
xmlWriter.WriteComment(
"this is an example writed by http://www.baidu.com/"
);
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();
}
}
}
C#处理Xml的相关随笔:
1.通过XmlDocument读写Xml文档 2.使用XmlReader读Xml,使用XmlWriter写Xml 3.使用Linq to xml存取XML 4.通过XmlScheme定义固定格式xml文档 5.Xml序列化或者反序列化类 6.通过XPath查找Xml节点 7.通过Xslt转化Xml格式