c# - 选择节点值并选择最大值

Question

我想从每个“临时”产品的所有详细信息标签中选择“最高”的深度、宽度和高度值。

这是我的 XML 示例:

    <root>
     <Temp>
        <Code>1234567</Code>
            <Detail>
                <Depth>12.7</Depth>
                <Width>1.27</Width>
                <Height>15.24</Height>
            </Detail>

        <DetailConversion>
            <Detail>
                <Depth>34.925</Depth>
                <Width>30.48</Width>
                <Height>19.05</Height>
            </Detail>
        </DetailConversion>

        <DetailConversion>
            <Detail>
                <Depth>34.925</Depth>
                <Width>30.48</Width>
                <Height>19.05</Height>
            </Detail>
        </DetailConversion>
     </Temp>
<Temp>
        <Code>1234567</Code>
            <Detail>
                <Depth>12.7</Depth>
                <Width>1.27</Width>
                <Height>15.24</Height>
            </Detail>

        <DetailConversion>
            <Detail>
                <Depth>34.925</Depth>
                <Width>30.48</Width>
                <Height>19.05</Height>
            </Detail>
        </DetailConversion>

        <DetailConversion>
            <Detail>
                <Depth>34.925</Depth>
                <Width>30.48</Width>
                <Height>19.05</Height>
            </Detail>
        </DetailConversion>
     </Temp>
    </root>

我试过了

int maxDepth = doc.Root.Elements().Max(x => (int)x.Element("Depth"));
int maxWidth = doc.Root.Elements().Max(x => (int)x.Element("Width"));
int maxHeight = doc.Root.Elements().Max(x => (int)x.Element("Height"));

但我真的不知道为什么这不起作用，maxDepth 始终为 0。maxDepth...必须为每个选择，而不是一起选择

你有什么想法吗？

更新完整的 XML

     <?xml version="1.0" encoding="utf-8"?>
<XmlInterchange xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.edi.com.au/EnterpriseService/" Version="1" >
    <InterchangeInfo>
        <Date>2015-05-29T14:17:45</Date>
    </InterchangeInfo>
    <Payload>
        <Temporaer>
            <Temp>
                <TempCode>ST66676EU</TempCode>
                <DetailConversion>
                    <Depth>12.7</Depth>
                    <Width>1.27</Width>
                    <Height>15.24</Height>
                </DetailConversion>
                <DetailConversions>
                    <DetailConversion>

                            <Depth>16.51</Depth>
                            <Width>13.97</Width>
                            <Height>6.35</Height>

                    </DetailConversion>
                    <DetailConversion>

                            <Depth>34.925</Depth>
                            <Width>30.48</Width>
                            <Height>19.05</Height>

                    </DetailConversion>
                </DetailConversions>
            </Temp>
        </Temporaer>
    </Payload>
</XmlInterchange>

Answer 1

您必须使用 Descendant() 获取根的所有子节点，因为 Elements() 不会获取嵌套的子节点:

int maxDepth = doc.Root.Descendants().Max(x => (int)x.Element("Depth"));

或更准确地说是:

int maxDepth = doc.Root.Descendants("Detail").Max(x => (int)x.Element("Depth")));    

更新:

你想获得每个Temp节点的max Depth元素值，那么你必须这样做:

var maxDepth = doc.Root.Descendants("Detail")
                       .Select(x=>x.Max(y => (int)y.Element("Depth"))); 

或:

var maxDepth = doc.Root.Descendants("Temp")
                       .Select(x=>x.Descendants("Detail"))
                       .Select(x=>x.Max(y => (int)y.Element("Depth")));