WCF服務中的LINQ到XML

Question

我正在使用VS 2008.我必須創建一個wcf服務，並且在服務內部，我必須對使用LINQ to XML的xml文件執行一些基本操作。我必須在IIS 7.0中託管服務並使用它。

由於LINQ的一部分到XML我必須執行以下任務：

1. 發現在所有調查的所有問題的答案是沒有
2. 修改查詢ID的問題和答案=」 Enquiry2"

粘貼下面是XML文件

<b:ServeySet xmlns:b="b:urn:schemas-microsoft-com"> 
    <b:Enquires> 
    <b:Enquiry id="Enquiry1"> 
     <b:Question id="1" question="is the summer hot in LA?" answer="yes"/> 
     <b:Question id="3" question="is this hard exercise?" answer="no"/> 
     <b:Question id="2" question="is this awesome?" answer="yes"/> 
    </b:Enquiry > 
    <b:Enquiry id="Enquiry2"> 
     <b:Question id="1" question="what is SFO?" answer="City"/> 
     <b:Question id="2" question="is this hard exercise?" answer="no"/> 
    </b:Enquiry > 
    </b:Enquires> 
</b:ServeySet> 

Answer 1

試試升ike this：

static void Main(string[] args) 
{ 
    // create the XDocument and load the file from disk 
    XDocument doc = XDocument.Load("youroriginalfile.xml"); 

    // define the XML namespace used 
    XNamespace b = "b:urn:schemas-microsoft-com:billing-data"; 

    // get all the questions where the answer is "no" 
    var questionsWithAnswerNo = doc.Descendants(b + "Question").Where(x => x.Attribute("answer").Value == "no"); 

    // loop over these questions and do something..... 
    foreach (XElement question in questionsWithAnswerNo) 
    { 
     // do something 
    } 

    // find questions for test with "test2" id 
    var test2 = doc.Descendants(b + "Test").Where(x => x.Attribute("id").Value == "test2").FirstOrDefault(); 

    if(test2 != null) 
    { 
     // loop over questions, prepend a "TEST2: " to both question and 
     // answer attribute of each of the questions 
     foreach (XElement q2 in test2.Descendants(b + "Question")) 
     { 
      a2.Attribute("question").Value = "Test2: " + a2.Attribute("question").Value; 
      a2.Attribute("answer").Value = "Test2: " + a2.Attribute("answer").Value; 
     } 

     // save the modified file 
     doc.Save("newfile.xml"); 
    }