Question

我有以下XML文件。

<JamStatus>
<IPAddress Value="10.210.104.32 " FacId="2">
<Type>Letter</Type>
<JobId>1</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309464601:144592</TimestampPrinting>
</IPAddress>
<IPAddress Value="10.210.104.32 " FacId="2">
<Type>Letter</Type>
<JobId>2</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309465072:547772</TimestampPrinting>
</IPAddress> 
<IPAddress Value="10.210.104.32 " FacId="2">
<Type>Letter</Type>
<JobId>2</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309465072:547772</TimestampPrinting>
</IPAddress>  
</JamStatus>

文档中可能有任意数量的IPaddress elememt。对于特定的IPAddress，jobid和timestamp可以是相同的。我想获取其Value，jobid和timestampprinting相同的ipAddress计数。在这种情况下，它是2.这是获取此信息的最佳方式？

有没有使用LINQ的简单方法？

谢谢， SYD

Answer 1

您可以使用XElement和LINQ：

            var s = @"
                <JamStatus>
<IPAddress Value=""10.210.104.32 "" FacId=""2"">
<Type>Letter</Type>
<JobId>1</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309464601:144592</TimestampPrinting>
</IPAddress>
<IPAddress Value=""10.210.104.32 "" FacId=""2"">
<Type>Letter</Type>
<JobId>2</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309465072:547772</TimestampPrinting>
</IPAddress> 
<IPAddress Value=""10.210.104.32 "" FacId=""2"">
<Type>Letter</Type>
<JobId>2</JobId>
<fi>50-30C-KMC-360A</fi>
<TimestampPrinting>1309465072:547772</TimestampPrinting>
</IPAddress>  
</JamStatus>";

            XElement xel = XElement.Parse(s);

            Console.WriteLine(xel.XPathSelectElements("//IPAddress")
                .GroupBy(el => new Tuple<string, string>(el.Element((XName)"JobId").Value, el.Element((XName)"TimestampPrinting").Value))
                .Max(g => g.Count())
            );

Answer 2

我会推荐Linq-to-XML。如果我理解正确，您希望找到IPAddress，JobId和TimestampPrinting的集合，其中JobId和TimestampPrinting是相同的。为此，您需要group元素。

过滤XML文档中的数据

2 个答案: