LINQ to XML 查询不返回结果

发布于 2024-11-25 02:52:08 字数 2089 浏览 0 评论 0原文

我正在用 VB 做一些 XLINQ 工作。我基本上需要从一小块 XML 中提取一些值，如下所示：

<?xml version="1.0" encoding="utf-8"?>
  <Fields>
    <typeQtyRadioButtonList>1</typeQtyRadioButtonList>
    <cmbQtyCheck>Reject</cmbQtyCheck>
    <optHaulierDetCheck>1</optHaulierDetCheck>
    <txtReasonCode>1</txtReasonCode>
    <optGenMod>0</optGenMod>
    <optFarmRestrictions>0</optFarmRestrictions>
    <cmbFRAction>Reject</cmbFRAction>
    <optDisease>0</optDisease>
    <txtDReasonCode>2</txtDReasonCode>
    <optWithdrawl>0</optWithdrawl>
    <txtWithdrawl>3</txtWithdrawl>
    <optABM>0</optABM>
    <txtCompliance>3</txtCompliance>
    <optForm>1</optForm>
  </Fields>

为此，我使用：

    Dim _ControlValueCollections = From _ControlValueCollection In _Xmlx.Descendants("Fields") _
                                  Select _Qstn1Response = _ControlValueCollection.Element("typeQtyRadioButtonList").Value, _
                                         _Qstn2Response = _ControlValueCollection.Element("optHaulierDetCheck").Value, _
                                         _Qstn3Response = _ControlValueCollection.Element("optGenMod").Value, _
                                         _Qstn4Response = _ControlValueCollection.Element("optFarmRestrictions").Value, _
                                         _Qstn5Response = _ControlValueCollection.Element("optDisease").Value, _
                                         _Qstn6Response = _ControlValueCollection.Element("optWithdrawl").Value, _
                                         _Qstn7Response = _ControlValueCollection.Element("optABM").Value, _
                                         _Qstn8Response = _ControlValueCollection.Element("optForm").Value

    For Each _ControlValueCollection In _ControlValueCollections

...省略 For Each 循环的实现...

所以我在对于每个，集合中没有元素。我错过了什么吗？

编辑：答案当然是我使用的是 XElement 而不是 XDocument。

原文

I'm doing some XLINQ in VB for work. I basically need to pull some values from a small chunk of XML as listed here:

<?xml version="1.0" encoding="utf-8"?>
  <Fields>
    <typeQtyRadioButtonList>1</typeQtyRadioButtonList>
    <cmbQtyCheck>Reject</cmbQtyCheck>
    <optHaulierDetCheck>1</optHaulierDetCheck>
    <txtReasonCode>1</txtReasonCode>
    <optGenMod>0</optGenMod>
    <optFarmRestrictions>0</optFarmRestrictions>
    <cmbFRAction>Reject</cmbFRAction>
    <optDisease>0</optDisease>
    <txtDReasonCode>2</txtDReasonCode>
    <optWithdrawl>0</optWithdrawl>
    <txtWithdrawl>3</txtWithdrawl>
    <optABM>0</optABM>
    <txtCompliance>3</txtCompliance>
    <optForm>1</optForm>
  </Fields>

And to do this I am using:

    Dim _ControlValueCollections = From _ControlValueCollection In _Xmlx.Descendants("Fields") _
                                  Select _Qstn1Response = _ControlValueCollection.Element("typeQtyRadioButtonList").Value, _
                                         _Qstn2Response = _ControlValueCollection.Element("optHaulierDetCheck").Value, _
                                         _Qstn3Response = _ControlValueCollection.Element("optGenMod").Value, _
                                         _Qstn4Response = _ControlValueCollection.Element("optFarmRestrictions").Value, _
                                         _Qstn5Response = _ControlValueCollection.Element("optDisease").Value, _
                                         _Qstn6Response = _ControlValueCollection.Element("optWithdrawl").Value, _
                                         _Qstn7Response = _ControlValueCollection.Element("optABM").Value, _
                                         _Qstn8Response = _ControlValueCollection.Element("optForm").Value

    For Each _ControlValueCollection In _ControlValueCollections

... Leaving out the implementation of the For Each loop....

So I have stuck a break point on the for each and the collection has no elements in it. Am I missing something ?

EDIT: The Answer was of course that I was using an XElement and not an XDocument.

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南笙 2024-12-02 02:52:08

_Xmlx.Descendants("Fields") 查找 XContainer _Xmlx 的名为 Fields 的后代元素。如果您已完成 XDocument _Xmlx = XDocument("input.xml");，那么您的 XContainer _Xmlx 有一个名为 Fields 的唯一后代元素，并且您的代码会起作用。如果您已执行 XElement _Xmlx = XElement.Load("input.xml");，则变量 _Xmlx 就是“Fields”元素本身。