为什么只吃一个？ Linq到XML C＃

Question

I can't figure out why my code just taking the first tag and not the rest.

var xml = XDocument.Load(HttpContext.Current.Server.MapPath("~/App_Data/Themes.xml"));

var q = from f in xml.Descendants("themes")
        select new ThemesItem
        {
            Name = f.Element("theme").Element("name").Value,
            Description = f.Element("theme").Element("description").Value,
            Author = f.Element("theme").Element("author").Value,
        };

return q.ToList();

ThemeItem is just a get set with public string When i write out this data i use a repeater Thanks for help :)

Answer 1

That is because the Descendants extension method takes all decendants of the xml node, that is named "themes". Since your themes node is the container for the individual theme tags, there is only one, and when you take .Element on that, you get the first occurence.

This code should work:

var q = from f in xml.Descendants("theme")
        select new ThemesItem
        {
            Name = f.Element("name").Value,
            Description = f.Element("description").Value,
            Author = f.Element("author").Value,
        };

Answer 2

<themes>
  <theme>
    <name>Standard</name>
    <description>standard theme</description>
    <author>User 1</author>
    <folder>standard</folder>
  </theme>
  <theme>
    <name>Standard</name>
    <description>standard theme</description>
    <author>User 2</author>
    <folder>standard</folder>
  </theme>
</themes>

Answer 3

Try using XElement.Load() instead of XDocument.Load()

http://msdn.microsoft.com/en-us/library/bb675196.aspx