Question

我在知道如何在XML文件中对同一属性的多个实例求和时遇到问题。我的第一个想法是构建一个数组来保存值然后将它们加在一起。不幸的是，我的c＃代码知识不在应有的位置。

double customerRate = Convert.ToDouble(
    import.Elements("PriceSheets")
        .Elements("PriceSheet")
        .Where(priceSheet => priceSheet.Attribute("type").Value == "Cost" 
            && priceSheet.Attribute("isAllocated").Value == "true" 
            && priceSheet.Attribute("isSelected").Value == "true")
        .First()
        .Element("Total"));

下面是我读取的XML文件，其中包含重复属性Total

<Enterprises>    
 <PriceSheets>
    <PriceSheet type="Cost" 
        chargeModel="NORMALIZED_MANUAL" isSelected="true" isAllocated="true" 
        currencyCode="USD" createDate="05/25/2017 15:03" 
        updateDate="05/25/2017 15:18" internalId="5099262823">
    <AccessorialTotal>222.80</AccessorialTotal>
    <SubTotal>780.69</SubTotal>
    <Total>1003.49</Total>
    </PriceSheet>
 </PriceSheets>
</Enterprises>

Answer 1

易于;你有大部分是正确的：

var sum = 
    import
    .Elements("Enterprises")
    .Elements("PriceSheets")
    .Elements("PriceSheet")
    .Where(priceSheet => priceSheet.Attribute("type").Value == "Cost"
        && priceSheet.Attribute("isAllocated").Value == "true"
        && priceSheet.Attribute("isSelected").Value == "true")
    //  Now you're working with a sequence of all the allocated and selected "Cost" price 
    //  sheets. You got this far. 
    //  So just grab their "Total" elements...
    .Elements("Total")
    //  And sum their values. 
    .Sum(total => Convert.ToDouble(total.Value));

从XML文件中求和属性

1 个答案: