XML节点命名

Question

下面是我的XML，我知道OrderDate、BuyerID和Items被称为子节点，但是如何将Items中的属性称为ItemName、Category等。它们还被称为子节点吗？如果是这样的话，它们应该被称为什么？

<?xml version="1.0" encoding="utf-8" ?>
<OrderData >

    <Order OrderID="OR00001">
      <OrderDate>26 May 2017</OrderDate>
      <BuyerID>WCS1810001</BuyerID>
      <Instructions>Place item carefully</Instructions>

      <Items ItemID="IT00001">
        <ItemName>ASUS Monitor</ItemName>
        <Description>Best monitor in the world</Description>
        <Category>Monitor</Category>
        <Quantities>100</Quantities>
        <Manufacturer>ASUS</Manufacturer>
        <UnitPrice>$100.00</UnitPrice>
      </Items>
  </Order>
</OrderData>

Answer 1

在xml术语中，您拥有的惟一属性是OrderID和ItemID属性。在使用xml时，只使用xml术语会很有帮助。因此，xml中的其他所有内容都是一个**元素**。

位于另一个元素下的任何元素都是该元素的子元素。

Items是Order的子元素，ItemName是Items的子元素。

Answer 2

我不明白为什么微软没有把这个添加到C#中。VB似乎更适合使用XML IMHO。

    Dim xe As XElement
    ' to load from a file
    ' Dim yourpath As String = "your path here"
    'xe = XElement.Load(yourpath)

    ' for testing
    xe = <OrderData>
             <Order OrderID="OR00001">
                 <OrderDate>26 May 2017</OrderDate>
                 <BuyerID>WCS1810001</BuyerID>
                 <Instructions>Place item carefully</Instructions>
                 <Items ItemID="IT00001">
                     <ItemName>ASUS Monitor</ItemName>
                     <Description>Best monitor in the world</Description>
                     <Category>Monitor</Category>
                     <Quantities>100</Quantities>
                     <Manufacturer>ASUS</Manufacturer>
                     <UnitPrice>$100.00</UnitPrice>
                 </Items>
             </Order>
         </OrderData>

    Dim item As XElement
    'this does not find an item
    item = (From el In xe...<Items>
            Where el.@ItemID = "IT"
            Select el).FirstOrDefault

    If item Is Nothing Then Stop

    'this finds the item
    item = (From el In xe...<Items>
            Where el.@ItemID = "IT00001"
            Select el).FirstOrDefault

    'add a new item to the order.  an item prototype
    Dim itmProto As XElement = <Items ItemID="">
                                   <ItemName></ItemName>
                                   <Description></Description>
                                   <Category></Category>
                                   <Quantities></Quantities>
                                   <Manufacturer></Manufacturer>
                                   <UnitPrice></UnitPrice>
                               </Items>

    Dim newItem As New XElement(itmProto) 'note that itmProto is not used directly, only as part of New
    newItem.@ItemID = "ITM0042"
    newItem.<ItemName>.Value = "FOO"
    newItem.<Description>.Value = "this is a test"
    'etc
    xe.<Order>.Last.Add(newItem) 'add to order

    ' to save file
    ' xe.Save(yourpath)