有些太久沒用真得很容易忘記
內容參考《Professional C#6 and .Net Core 1.0》
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XML文件
<?xml version='1.0'?>
<!-- This file represents a fragment of a book store inventory database -->
<bookstore>
<book genre="autobiography" publicationdate="1991" ISBN="1-861003-11-0">
<title>The Autobiography of Benjamin Franklin</title>
<author>
<first-name>Benjamin</first-name>
<last-name>Franklin</last-name>
</author>
<price>8.99</price>
</book>
<book genre="novel" publicationdate="1967" ISBN="0-201-63361-2">
<title>The Confidence Man</title>
<author>
<first-name>Herman</first-name>
<last-name>Melville</last-name>
</author>
<price>11.99</price>
</book>
<book genre="philosophy" publicationdate="1991" ISBN="1-861001-57-6">
<title>The Gorgias</title>
<author>
<name>Plato</name>
</author>
<price>9.99</price>
</book>
</bookstore>
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程式碼
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Xml;
namespace XmlExample
{
class Program
{
static void Main(string[] args)
{
var doc = new XmlDocument();
// 讀取xml
using (FileStream stream = File.OpenRead("books.xml"))
{
doc.Load(stream);
XmlNodeList priceNodes = doc.GetElementsByTagName("price");
foreach (XmlNode node in priceNodes)
{
// 修改內容
node.InnerText = "100";
}
}
// 寫入xml
var settings = new XmlWriterSettings
{
Indent = true,
IndentChars = "\t",
NewLineChars = Environment.NewLine
};
using (StreamWriter streamWriter = File.CreateText("newbooks.xml"))
using (XmlWriter writer = XmlWriter.Create(streamWriter, settings))
{
doc.WriteContentTo(writer);
}
Console.WriteLine("Finish");
Console.ReadLine();
}
}
}
