使用 XmlReader 读取 xml 文件只读取第一个元素 [英] reading xml file with XmlReader reads only the first element
本文介绍了使用 XmlReader 读取 xml 文件只读取第一个元素的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在使用 XmlReader 读取子元素时遇到问题.
I'm having problems reading child elements with XmlReader.
我的xml文件
<?xml version="1.0" encoding="UTF-8"?>
<WateringZones>
<WateringZone>
<Enabled>True</Enabled>
<Name>Calle 1</Name>
<Relay>1</Relay>
<Monday>True</Monday>
<Tuesday>True</Tuesday>
<Wednesday>True</Wednesday>
<Thursday>True</Thursday>
<Friday>True</Friday>
<Saturday>True</Saturday>
<Sunday>False</Sunday>
<WateringTurns>
<WateringTurn>
<Enabled>True</Enabled>
<Name>Turno 1</Name>
<Minutes>5</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>True</Enabled>
<Name>Turno 2</Name>
<Minutes>5</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>True</Enabled>
<Name>Turno 3</Name>
<Minutes>5</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 4</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 5</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 6</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 7</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 8</Name>
<Minutes>0</Minutes>
</WateringTurn>
</WateringTurns>
</WateringZone>
<WateringZone>
<Enabled>True</Enabled>
<Name>Calle 2</Name>
<Relay>2</Relay>
<Monday>False</Monday>
<Tuesday>True</Tuesday>
<Wednesday>False</Wednesday>
<Thursday>False</Thursday>
<Friday>True</Friday>
<Saturday>True</Saturday>
<Sunday>False</Sunday>
<WateringTurns>
<WateringTurn>
<Enabled>True</Enabled>
<Name>Turno 1</Name>
<Minutes>5</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 2</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 3</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 4</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 5</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 6</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 7</Name>
<Minutes>0</Minutes>
</WateringTurn>
<WateringTurn>
<Enabled>False</Enabled>
<Name>Turno 8</Name>
<Minutes>0</Minutes>
</WateringTurn>
</WateringTurns>
</WateringZone>
</WateringZones>
我正在尝试使用以下代码读取此文件:
and I'm trying to read this file with the following code:
private void LoadFromXml(string filename)
{
try
{
int sprinkler = 0;
int sprinklerTurn = 0;
// Create an XML reader for this file.
using (XmlReader reader = XmlReader.Create(filename))
{
while (reader.Read())
{
// Only detect start elements.
if (reader.IsStartElement())
{
while (reader.Read())
{
Console.WriteLine(reader.NodeType + ": " + reader.LocalName + "\n");
if (reader.NodeType.Equals(XmlNodeType.Element))
{
// Get element name and switch on it.
switch (reader.LocalName)
{
case "WateringZone":
{
sprinklerTurn = 0;
// Detect this element.
if (reader.ReadToFollowing("Enabled"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Enabled = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Name"))
{
wateringScheluder.WateringZones[sprinkler].Name = reader.ReadElementContentAsString();
}
if (reader.ReadToFollowing("Relay"))
{
wateringScheluder.WateringZones[sprinkler].Relay = reader.ReadElementContentAsInt();
}
if (reader.ReadToFollowing("Monday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Monday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Tuesday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Tuesday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Wednesday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Wednesday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Thursday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Thursday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Friday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Friday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Saturday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Saturday = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Sunday"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].Sunday = Convert.ToBoolean(enabled);
}
// Esperamos el signiente springle
sprinkler++;
}
break;
case "WateringTurn":
{
if (reader.ReadToFollowing("Enabled"))
{
var enabled = reader.ReadElementContentAsString();
wateringScheluder.WateringZones[sprinkler].WateringTurns[sprinklerTurn].Enabled = Convert.ToBoolean(enabled);
}
if (reader.ReadToFollowing("Name"))
{
wateringScheluder.WateringZones[sprinkler].WateringTurns[sprinklerTurn].Name = reader.ReadElementContentAsString();
}
if (reader.ReadToFollowing("Minutes"))
{
wateringScheluder.WateringZones[sprinkler].WateringTurns[sprinklerTurn].Minutes = reader.ReadElementContentAsInt();
}
// Esperamos el siguiente turno
sprinklerTurn++;
}
break;
default:
// ignore other nodes
break;
}
}
}
}
}
}
}
catch (Exception e)
{
MessageBox.Show("No se pudo cargar, el mensaje de error fue :" + e.Message);
}
}
但它只读取第一个 reader.Read() 返回 false，不应该继续阅读
But it only reads the first <WateringZone> and then reader.Read() returns false, isn't supposed to continue reading <WateringTurns> ?
推荐答案
这里是结合 XmlReader 和 Xml Linq 的解决方案.
Here is solution using combination of XmlReader and Xml Linq.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
namespace ConsoleApplication1
{
class Program
{
const string FILENAME = @"c:\temp\test.xml";
static void Main(string[] args)
{
XmlReader reader = XmlReader.Create(FILENAME);
while (!reader.EOF)
{
if (reader.Name != "WateringZone")
{
reader.ReadToFollowing("WateringZone");
}
if (!reader.EOF)
{
XElement wateringZone = (XElement)XElement.ReadFrom(reader);
WateringZone newZone = new WateringZone();
WateringZone.wateringZones.Add(newZone);
newZone.enabled = (Boolean)wateringZone.Element("Enabled");
newZone.name = (string)wateringZone.Element("Name");
newZone.relay = (int)wateringZone.Element("Relay");
newZone.monday = (Boolean)wateringZone.Element("Monday");
newZone.tuesday = (Boolean)wateringZone.Element("Tuesday");
newZone.wednesday = (Boolean)wateringZone.Element("Wednesday");
newZone.thursday = (Boolean)wateringZone.Element("Thursday");
newZone.friday = (Boolean)wateringZone.Element("Friday");
newZone.saturday = (Boolean)wateringZone.Element("Saturday");
newZone.sunday = (Boolean)wateringZone.Element("Sunday");
newZone.wateringTurns = wateringZone.Descendants("WateringTurn").Select(x => new WateringTurn() {
enabled = (Boolean)x.Element("Enabled"),
name = (string)x.Element("Name"),
minutes = (int)x.Element("Minutes")
}).ToList();
}
}
}
}
public class WateringZone
{
public static List<WateringZone> wateringZones = new List<WateringZone>();
public Boolean enabled { get;set;}
public string name { get;set;}
public int relay { get;set;}
public Boolean monday { get;set;}
public Boolean wednesday { get; set;}
public Boolean thursday { get; set;}
public Boolean tuesday { get; set;}
public Boolean friday { get; set;}
public Boolean saturday { get; set;}
public Boolean sunday { get; set;}
public List<WateringTurn> wateringTurns { get; set; }
}
public class WateringTurn
{
public Boolean enabled {get;set;}
public string name { get;set;}
public int minutes { get; set; }
}
}
这篇关于使用 XmlReader 读取 xml 文件只读取第一个元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
