Question

好吧，因为我无法发表评论，并且在原始问题上寻求帮助，我发现了这个问题，我正在为它做一个新问题（原文：How do I get the value from a specific node in an XML file?）

这是我的两个班级;一个是我的XML文件结构，第二个是列表：

Public Class Member
 Public Naam As String
 Public Kills As Integer
 Public Deaths As Integer
 Public KD As Integer
End Class

Public Class Tabel
 <XmlElement("Member")> _
 Public Members As List(Of Member)
End Class

这是执行它的代码：

Dim serializer As XmlSerializer = New XmlSerializer(GetType(Tabel))
Dim tabel As Tabel = CType(serializer.Deserialize(File.OpenRead("C:\members.xml")), Tabel)
For Each member As Member In tabel
    Dim kills As Integer = member.Kills
Next

它应该循环遍历xml文件并按原样执行，但它会在＆＃34; tabel＆＃34;上出错。 For Each循环中的最后一个变量。说：表达式是＆＃39; VBTest.tabel＆＃39;，它不是集合类型。

提前致谢！

Answer 1

您需要将Members属性声明为New对象，否则会出错。如果你是用于保存集合的外部xml元素，则省略<XmlElement("Member")>。

Public Class Tabel
  '<XmlElement("Member")>
  Public Property Members As New List(Of Member)
End Class

输出：

<?xml version="1.0" encoding="utf-8"?>
<tebel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Members>
    <Member>
      <Id>1</Id>
    </Member>
  </Members>

如果你添加它们，那么你需要在循环之外的变量。

Dim kills As Integer
For Each member As Member In tabel.Members
  kills += member.Kills
Next

表达式的类型为“FileName”，它不是集合类型

1 个答案: