使用XmlWriter寫Xml
假定創建了XmlWriter的實例變量xmlWriter，下文中將使用此實例變量寫Xml
1.如何使用XmlWriter寫Xml文檔聲明
// WriteStartDocument方法可以接受一個bool參數（表示standalone，是否為獨立文檔）或者不指定參數standalone保持默認值
xmlWriter.WriteStartDocument(
false
|
true
);
|
注意在使用WriteStartDocument方法后最好調用xmlWrite.WriteEndDocument()方法來關閉所有可能未關閉標簽
2.如何使用XmlWriter寫xml節點以及屬性
//寫節點
xmlWriter.WriteStartElement(
"cat"
);
//給節點添加屬性
xmlWriter.WriteAttributeString(
"color"
,
"white"
);
//給節點內部添加文本
xmlWriter.WriteString(
"I'm a cat"
);
xmlWriter.WriteEndElement();
|
或者通過WriteElementString(string,string)方法寫xml節點同時寫下節點值，如下
//通過WriteElementString可以添加一個節點同時添加節點內容
xmlWriter.WriteElementString(
"pig"
,
"pig is great"
);
|
3.如何寫CData
xmlWriter.WriteStartElement(
"dog"
);
//寫CData
xmlWriter.WriteCData(
"<strong>dog is dog</strong>"
);
xmlWriter.WriteEndElement();
|
4.如何使用XmlWriter添加注釋
xmlWriter.WriteComment(
"this is an example writed by 玉開技術博客 http://www.cnblogs.com/yukaizhao "
);
|
5.如何設置XmlWriter的輸出格式，解決輸出UTF-16問題
設置xml輸出格式，需要通過XmlWriterSettings類，如下代碼
XmlWriterSettings settings =
new
XmlWriterSettings();
//要求縮進
settings.Indent =
true
;
//注意如果不設置encoding默認將輸出utf-16
//注意這兒不能直接用Encoding.UTF8如果用Encoding.UTF8將在輸出文本的最前面添加4個字節的非xml內容
settings.Encoding =
new
UTF8Encoding(
false
);
//設置換行符
settings.NewLineChars = Environment.NewLine;
|
完整的代碼示例如下：
/*玉開技術博客 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();
//要求縮進
settings.Indent =
true
;
//注意如果不設置encoding默認將輸出utf-16
//注意這兒不能直接用Encoding.UTF8如果用Encoding.UTF8將在輸出文本的最前面添加4個字節的非xml內容
settings.Encoding =
new
UTF8Encoding(
false
);
//設置換行符
settings.NewLineChars = Environment.NewLine;
using
(XmlWriter xmlWriter = XmlWriter.Create(ms, settings))
{
//寫xml文件開始<?xml version="1.0" encoding="utf-8" ?>
xmlWriter.WriteStartDocument(
false
);
//寫根節點
xmlWriter.WriteStartElement(
"root"
);
//寫字節點
xmlWriter.WriteStartElement(
"cat"
);
//給節點添加屬性
xmlWriter.WriteAttributeString(
"color"
,
"white"
);
//給節點內部添加文本
xmlWriter.WriteString(
"I'm a cat"
);
xmlWriter.WriteEndElement();
//通過WriteElementString可以添加一個節點同時添加節點內容
xmlWriter.WriteElementString(
"pig"
,
"pig is great"
);
xmlWriter.WriteStartElement(
"dog"
);
//寫CData
xmlWriter.WriteCData(
"<strong>dog is dog</strong>"
);
xmlWriter.WriteEndElement();
xmlWriter.WriteComment(
"this is an example writed by 玉開技術博客 http://www.cnblogs.com/yukaizhao "
);
xmlWriter.WriteEndElement();
xmlWriter.WriteEndDocument();
}
//將xml內容輸出到控制台中
string
xml = Encoding.UTF8.GetString(ms.ToArray());
Console.WriteLine(xml);
}
Console.Read();
}
}
}
|
C#處理Xml的相關隨筆：