假定建立了XmlWriter的執行個體變數xmlWriter,下文中將使用此執行個體變數寫Xml
1.如何使用XmlWriter寫Xml文檔聲明
複製代碼 代碼如下:// 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保持預設值
xmlWriter.WriteStartDocument(false|true);
注意在使用WriteStartDocument方法後最好調用xmlWrite.WriteEndDocument()方法來關閉所有可能未關閉標籤
2.如何使用XmlWriter寫xml節點以及屬性
複製代碼 代碼如下://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,如下複製代碼 代碼如下://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
複製代碼 代碼如下:xmlWriter.WriteStartElement("dog");
//寫CData
xmlWriter.WriteCData("<strong>dog is dog</strong>");
xmlWriter.WriteEndElement();
4.如何使用XmlWriter添加註釋
複製代碼 代碼如下:xmlWriter.WriteComment("this is an example writed by http://www.jb51.net ");
5.如何設定XmlWriter的輸出格式,解決輸出UTF-16問題
設定xml輸出格式,需要通過XmlWriterSettings類,如下代碼複製代碼 代碼如下:XmlWriterSettings settings = new XmlWriterSettings();
//要求縮排
settings.Indent = true;
//注意如果不設定encoding預設將輸出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個位元組的非xml內容
settings.Encoding = new UTF8Encoding(false);
//設定分行符號
settings.NewLineChars = Environment.NewLine;
完整的程式碼範例如下:複製代碼 代碼如下: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();
//要求縮排
settings.Indent = true;
//注意如果不設定encoding預設將輸出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個位元組的非xml內容
settings.Encoding = new UTF8Encoding(false);
//設定分行符號
settings.NewLineChars = Environment.NewLine;
using (XmlWriter xmlWriter = XmlWriter.Create(ms, settings))
{
//寫xml檔案開始<?xml version="1.0" encoding="utf-8" ?>
xmlWriter.WriteStartDocument(false);
//寫根節點
xmlWriter.WriteStartElement("root");
//寫位元組點
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 http://www.jb51.net ");
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();
}
}
}