Linq to xml：找出父母？

Question

我想使用XElement來找出屬性Id的父節點。見下面的例子 這是我的數據..

<Data> 
     <Description>MASTER</Description> 
     <Data> 
     <Description>Parent1</Description> 
     <Data id="GUID1" Description="THIS IS A TEST" /> 
     <Data id="GUID2" Description="THIS IS A TEST" /> 
     <Data id="GUID3" Description="THIS IS A TEST" /> 
     </Data> 
     <Data> 
     <Description>Parent2</Description> 
     <Data id="GUID4" Description="THIS IS A TEST" /> 
     <Data id="GUID5" Description="THIS IS A TEST" /> 
     </Data> 
     <Data id="GUID6" Description="THIS IS A TEST" /> 
    </Data> 

如果我想找出「GUID6」和「GUID1」父母的結果將是GUID6 =「MASTER」 和GUID1 =「MASTERParent1」，但我的結果不正確。請有人可以幫助我。

我也希望可以將輸出爲「MASTER.Parent1」所以它通過使用「點」

這裏分割了主，父是我的代碼

protected void Page_Load(object sender, EventArgs e) 
     { 
      var s = "<Data><Description>MASTER</Description><Data><Description>PARENT1</Description><Data id=\"GUID1\" Description=\"THIS IS A TEST\" /><Data id=\"GUID2\" Description=\"THIS IS A TEST\" /><Data id=\"GUID3\" Description=\"THIS IS A TEST\" /></Data><Data><Description>PARENT2</Description><Data id=\"GUID4\" Description=\"THIS IS A TEST\" /><Data id=\"GUID5\" Description=\"THIS IS A TEST\" /></Data><Data id=\"GUID6\" Description=\"THIS IS A TEST\" /></Data>"; 
      var doc = XElement.Load(new StringReader(s)); 
      var result = (from data in doc.Descendants("Data").Where(x => x.Attribute("id") != null) 
          select new 
           { 
            Id = data.Attribute("id").Value, 
            Decription = data.Attribute("Description").Value, 
            Parent = data.Parent.Value 
           }).ToList(); 


     } 

Answer 1

我覺得你的例子和你要求的東西不匹配。看看我的解讀是你在找什麼。

var s = @" 
<Data> 
    <Description>MASTER</Description> 
    <Data> 
     <Description>Parent1</Description> 
     <Data id=""GUID1"" Description=""THIS IS A TEST"" /> 
     <Data id=""GUID2"" Description=""THIS IS A TEST"" /> 
     <Data id=""GUID3"" Description=""THIS IS A TEST"" /> 
    </Data> 
    <Data> 
     <Description>Parent2</Description> 
     <Data id=""GUID4"" Description=""THIS IS A TEST"" /> 
     <Data id=""GUID5"" Description=""THIS IS A TEST"" /> 
    </Data> 
    <Data id=""GUID6"" Description=""THIS IS A TEST"" /> 
</Data>"; 

var doc = XElement.Load(new StringReader(s)); 

var desiredGuids = new List<string>{ "GUID1", "GUID6" }; 

var result = (from data in doc.Descendants("Data") 
      where data.Attribute("id") != null && desiredGuids.Contains((string)data.Attribute("id")) 
      select new { 
       Id = data.Parent.Element("Description").Value + "." + (string)data.Attribute("id"), 
       Description = (string)data.Attribute("Description"), 
       Parent = data.Parent.Element("Description").Value 
      }); 

foreach (var element in result) 
{ 
    Console.WriteLine("{0} {1}", element.Id, element.Description); 
} 

導致該輸出

Parent1.GUID1 THIS IS A TEST 
MASTER.GUID6 THIS IS A TEST