读取属性值与的XmlReader [英] Reading attribute values with XmlReader

问题描述

我有我试图从这里 读取XML文件，并具有以下代码：

I have an XML file that I'm trying to read from here, and have the following code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.IO;

namespace XML
{
    class Program
    {
        static void Main(string[] args)
        {
            XmlTextReader textReader = new XmlTextReader("secLendingXML.cfm.xml");
            while (textReader.Read())
            {
                switch (textReader.NodeType)
                {
                    case XmlNodeType.Element:
                        Console.WriteLine(textReader.Name);
                        Console.WriteLine(textReader.Value);
                        break;
                    case XmlNodeType.Text:
                        Console.WriteLine(textReader.Value);
                        break;
                    case XmlNodeType.XmlDeclaration:
                    case XmlNodeType.ProcessingInstruction:
                        Console.WriteLine(textReader.Name + " " + textReader.Value);
                        break;
                    case XmlNodeType.Comment:
                        Console.WriteLine(textReader.Value);
                        break;
                    case XmlNodeType.EndElement:
                        break;
                }
            }
            Console.ReadLine();
        }
    }
}

中的代码在正常工作这个意义上，它的读出节点和返回的名称。但是，问题是，我想还检索节点中的数据。换句话说，当读取测试部分在首节过后，它会读取：

The code is working properly in the sense that it's reading the nodes and returning the names. But, the issue is that I'm trying to also retrieve the data within the nodes. In other words, when it reads the first section after the test section, it will read:

slnc:DataSet
slnc:Group
slnc:Section
slnc:ActualAvailableToBorrow
*** here ***
slnc:oustandingLoans

这就是我想要的TextReader像
保密=F的节点内阅读下列值，货币=USD等，但它只是跳过权到
下一章节不读这些值！

This is where I want the textreader to read the following values within the node like confidentiality="F", currency="USD", etc., but it just skips right to the next section without reading these values!

<slnc:actualAvailableToBorrow xmlns:slnc="http://www.newyorkfed.org/xml/schemas/SecLending" 
      confidentiality="F" currency="USD" decimals="0" method="AA" 
      multiplier="5" securityLendingType="AA" status="A" value="1474"/>

我如何获得的TextReader读取属性值？这将是理想的它打印值货币，然后将其值：F，等等。

How do I get the textreader to read the attribute values? It would be ideal for it to print the value "currency", and then its value: "F", and so on.

推荐答案

使用的 XmlTextReader.GetAttribute（MSDN）

case XmlNodeType.Element:
  Console.WriteLine(textReader.Name);
  Console.WriteLine(textReader.Value);
  Console.WriteLine(textReader.GetAttribute("currency"));

这个功能的一个很好的功能：如果没有定义的属性不会导致异常 - 它将简单地返回空。

使用 XmlTextReader.MoveToAttribute（MSDN）

使用AttributeCount属性结合MoveToAttribute：

Use the AttributeCount property in combination with MoveToAttribute:

case XmlNodeType.Element:
  Console.WriteLine(textReader.Name);
  Console.WriteLine(textReader.Value);
  for (int attInd = 0; attInd < textReader.AttributeCount; attInd++){
      textReader.MoveToAttribute( attInd );
      Console.WriteLine(textReader.Name);
      Console.WriteLine(textReader.Value);
  }
  textReader.MoveToElement(); 

这篇关于读取属性值与的XmlReader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！