c# - 使用 LINQ 从 xml 创建实体对象的最佳方法

Question

我有以下代码用于从源 XML 创建对象列表.我可以在 var query 中得到要求的结果多变的。创建 List<Video> 的最佳方法是什么？从这个结果？

注:首选Method Chaining如果可能的话。

代码

class Program
{
    static void Main(string[] args)
    {
        string xmlStringInput = @"<videoShop>
                                  <video title=""video1"" path=""videos\video1.wma""><Director>Speilberg</Director></video>
                                  <video title=""video2"" path=""videos\video2.wma""/>
                                </videoShop>";

        XDocument myDoc = XDocument.Parse(xmlStringInput);


        var videoElements = (from video in myDoc.Descendants("video") select video).ToList();
        foreach (var videoEle in videoElements)
        {
            //System.Xml.XPath namespace for XPathSelectElement
            var directorName = videoEle.XPathSelectElement(@"Director");
        }


        var query = from video in myDoc.Descendants("video")
                    select new
                    {
                        MyTitle = video.Attribute("title").Value,
                        MyPath = video.Attribute("path").Value
                    };

        //IEnumerable<XElement> elements = (IEnumerable<XElement>)query;
        //List<Video> videoLibrary = (List<Video>)query.ToList<Video>();

        Console.WriteLine(query);
        Console.ReadLine();

    }

}

实体

 public class Video
 {
     public string MyTitle { get; set; }
     public string MyPath { get; set; }
 }

引用:

1. What's the most efficient way to locate and set element values in an XDocument?
2. How do I get a list of child elements from XDocument object?
3. Creating objects from XML
4. C# LINQ with XML, cannot extract multiple fields with same name into object
5. How to get XElement's value and not value of all child-nodes?

Answer 1

var query = from vin myDoc.Descendants("video")
            select new Video
            {
                MyTitle = (string)v.Attribute("title"),
                MyPath = (string)v.Attribute("path")
            };

// var means List<Video> here
var results = query.ToList();

或者没有query变量:

// var means List<Video> here
var results = (from vin myDoc.Descendants("video")
               select new Video
               {
                   MyTitle = (string)v.Attribute("title"),
                   MyPath = (string)v.Attribute("path")
               }).ToList();

基于方法的查询:

var results = myDoc.Descendants("video")
                   .Select(v => new Video()
                                {
                                    MyTitle = (string)v.Attribute("title"),
                                    MyPath = (string)v.Attribute("path")
                                 }).ToList();