LINQ to XML-基于嵌套元素值获取元素 [英] LINQ to XML - Get element based on a nested elements value

问题描述

我想基于nest元素的值在XML中选择一个元素.

I want to select an element within my XML based on the value of a nest element.

以下是XML的示例:

<Agents>
    <Agent ID="xxx">
        <Login>xxx</Login>
        <Password>xxxx</Password>
        <Products>
            <Product ID="zzz">
            </Product>
        </Products>
    </Agent>
</Agents>

这是我第一次尝试LINQ查询:

Here is my first attempt at a LINQ query:

var DetailsOfUserAccount =
  from agent in policySpecificationXml
        .Descendants("Agent")
        .FirstOrDefault(p => (string)p.Attribute("ID") == productId)
        .Descendants()
  select new

谢谢.

推荐答案

尚不完全清楚，但听起来像是您想要的东西...

Not entirely clear, but sounds like you want something like...

var detailsOfUserAccount = policySpecificationXml
    .Descendants("Agent")
    .Where(agent => agent.Descandants("Product")
                         .Any(product => (string)product.Attribute("ID")
                                             == productId))
    .FirstOrDefault();

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