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<!doctype html>
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<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>
XmlReader 在未知元素的名称和属性的名称的情况下读取属性 - MayGodBlessYou
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<h1>XmlReader 在未知元素的名称和属性的名称的情况下读取属性</h1>
<div class="read-more clearfix">
<span class="date">2014/08/10</span>
<span>posted in </span>
<span class="posted-in"><a href='dotNET.html'>dotNET</a></span>
<span class="comments">
</span>
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<div class="article-content">
<p>经过努力,终于解决了XmlReader在未知元素的名称和属性的名称的情况下读取属性的方法。</p>
<span id="more"></span><!-- more -->
<p>在没有解决前,我的代码如下:</p>
<pre><code class="language-plain_text"> using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace ReadAttribute
{
class Program
{
static void Main(string[] args)
{
string path = @"e:\testfile\myMail.xml";
#region 读取属性的第一种方法
//string date;
//try
//{
// XmlReader xr = XmlReader.Create(path);
// xr.ReadToFollowing("mail");
// date = xr.GetAttribute("date");
// Console.Write("信件的日期为:");
// Console.WriteLine(date);
//}
//catch (Exception ex)
//{
// Console.WriteLine(ex.Message);
//}
#endregion
#region 读取属性的第二种方法
try
{
XmlReader xr = XmlReader.Create(path);
while (xr.Read())
{
if (xr.HasAttributes)
{
//Console.WriteLine("<" + xr.Name + ">的属性:");
//for (int i = 0; i < xr.AttributeCount; i++)
//{
//xr.MoveToAttribute(i);
Console.WriteLine("<" + xr.Name + ">的属性:");
Console.WriteLine("{0}={1}", xr.Name, xr.Value);
//}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
#endregion
Console.ReadKey();
}
}
}
</code></pre>
<p>解决后,我的代码如下:</p>
<pre><code class="language-plain_text"> using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
namespace ReadAttribute
{
class Program
{
static void Main(string[] args)
{
string path = @"e:\testfile\myMail.xml";
#region 读取属性的第一种方法
//string date;
//try
//{
// XmlReader xr = XmlReader.Create(path);
// xr.ReadToFollowing("mail");
// date = xr.GetAttribute("date");
// Console.Write("信件的日期为:");
// Console.WriteLine(date);
//}
//catch (Exception ex)
//{
// Console.WriteLine(ex.Message);
//}
#endregion
#region 读取属性的第二种方法
try
{
XmlReader xr = XmlReader.Create(path);
while (xr.Read())
{
if (xr.HasAttributes)
{
Console.WriteLine("<" + xr.Name + ">的属性:");
for (int i = 0; i < xr.AttributeCount; i++)
{
xr.MoveToAttribute(i);
//Console.WriteLine("<" + xr.Name + ">的属性:");
Console.WriteLine("{0}={1}", xr.Name, xr.Value);
} }
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
#endregion
Console.ReadKey();
}
}
}
</code></pre>
<p>解决后,上面的代码可以不用知道元素的名称和属性的名称的情况下读取XML文件中的所有属性名及其值。这种方法有点像迭代器遍历数组,只不过这里的元素变成了XML的节点和元素,而且这里可以把XML的属性也可以看成是XML的节点(”可以看成XML元素的子节点“),这样元素看成是节点,属性也看成是节点,都当做节点处理,也就是说这个遍历可以看成是遍历XML的节点。这样也就可以解释上面代码中的 xr.Name、xr.Value了,他们分别可以看成是XML的节点名和节点值(即属性名和属性值)。如此,这样的方法便不难理解了!</p>
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