loop through specific attribute using xml linq and c# and get its lowest value

Question

how do i get the lowest and highest value of the attribute value?

<parent>
  <anothertag value="20" />
  <body>
    <monitor value="3" />
    <mouse value="5" />
    <chair>
      <monoblock value="5" />
    </chair>
  </body>
</parent>

and this is my code

string xml = "<parent>" +
                "<anothertag value=\"20\"/>" +
                "<body>" +
                "<monitor value=\"3\"/>" +
                "<mouse value=\"5\"/>" +
                "<chair>" +
                "<monoblock value=\"5\"/>" +
                "</chair>" +
                "</body>" +
                "</parent>";
                XDocument doc = XDocument.Parse(xml);
                Console.WriteLine("value: " + doc.Descendants().ToList().Attributes("value").Min());

but im having an error saying

At least one object must implement IComparable

Answer 1

您必须将每个属性值解析为int：

Console.WriteLine("value: " + doc.Descendants().ToList().Attributes("value").Select(a => int.Parse(a.Value)).Min());

Answer 2

尝试这个：

Console.WriteLine("value: " + doc.Descendants().Max(x => x.Attribute("value") == null ? 0 : (int)x.Attribute("value")));

Answer 3

If you need to get the highest and the lowest value of one specific attribute, then one of the best method to achieve that in O(n) is using Aggregate extension method:

var minMax= doc.Descendants()
               .Where(e=>e.Attribute("value")!=null)
               .Aggregate(new {
                                Min = int.MaxValue,
                                Max = int.MinValue
                              },
                          (seed, o) => new 
                                       {
                                         Min = Math.Min((int)o.Attribute("value"), seed.Min),
                                         Max = Math.Max((int)o.Attribute("value"), seed.Max)
                                       }
                         );

loop through specific attribute using xml linq and c# and get its lowest value

Question

3 answers

solution1
1 2016-12-19 08:16:13

solution2
1 2016-12-19 08:18:02

solution3
1 2016-12-19 15:00:04

loop through specific attribute using xml linq and c# and get its lowest value

Question

3 answers

solution1 1 2016-12-19 08:16:13

solution2 1 2016-12-19 08:18:02

solution3 1 2016-12-19 15:00:04

solution1
1 2016-12-19 08:16:13

solution2
1 2016-12-19 08:18:02

solution3
1 2016-12-19 15:00:04