如何將節點追加到Silverlight中的xml文件？

Question

我在名爲XMLFile1.xml的ClientBin文件夾中有一個xml文件。 有文件三個節點：

<?xml version="1.0" encoding="utf-8" ?> 
<People> 
    <Person FirstName="Ram" LastName="Sita"/> 
    <Person FirstName="Krishna" LastName="Radha"/> 
    <Person FirstName="Heer" LastName="Ranjha"/> 
</People> 

我可以從文件中像讀取節點：

public class Person 
     { 
      public string FirstName { get; set; } 
      public string LastName { get; set; } 
     } 



private void Button_Click_1(object sender, RoutedEventArgs e) 
{ 

    Uri filePath = new Uri("XMLFile1.xml", UriKind.Relative); 
    WebClient client1 = new WebClient(); 
    client1.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client1_DownloadStringCompleted); 

    client1.DownloadStringAsync(filePath); 
} 


    void client1_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) 
     { 
      if (e.Error == null) 
      { 
       XDocument doc = XDocument.Parse(e.Result); 
       IEnumerable<Person> list = from p in doc.Descendants("Person") 
              select new Person 
              { 
               FirstName = (string)p.Attribute("FirstName"), 
               LastName = (string)p.Attribute("LastName") 
              }; 
       DataGrid1.ItemsSource = list; 
      } 
     } 

，但我不能添加節點到這一點。我已經用XDocument和XMLDocument完成了編譯錯誤。謝謝。

更新：比如我已經試過這樣的事情：

字符串名字= 「Ferhad」; string姓氏=「Cebiyev」;

XDocument xmlDoc = new XDocument(); 
    string path = "C:\\Users\\User\Desktop\\temp\\SilverlightApplication3\\SilverlightApplication3.Web\\ClientBin\\XMLFile1.xml"; 
    xmlDoc.Load(path); 
    xmlDoc.Add(new Person { FirstName=FirstName, LastName = LastName}); 

    xmlDoc.Save(path); 

Answer 1

這就是問題所在：

xmlDoc.Add(new Person { FirstName=FirstName, LastName = LastName}); 

兩個問題：

• ，試圖添加到文檔的根。已經有一個根元素，所以會失敗。
• 試圖將Person添加到文檔。你想添加一個XElement。

所以，你可能想：

xmlDoc.Root.Add(new XElement("Person", 
          new XAttribute("FirstName", FirstName), 
          new XAttribute("LastName", LastName)));