c# - 动态添加元素到 XML 文件

Question

我目前正在使用这段代码制作一个 XML 文件，我在其中创建一个对象，每次调用该方法时该对象都会写入 XML 文件:

        public static void TileMapCapabilities(string title, TilePicker picker)
        {
        var dbInfo = picker.GetCapabilitiesInfo();

        TileMapObject tmo = new TileMapObject()
        {
            Title = title,
            Abstract = "",
            KeywordList = new KeywordList() {FirstLayer = ""},
            SRS = "OSGEO:41001",
            Profile = "local",
            Format = "image/png",
            BoundingBox = dbInfo.eBoundingBox,
            MapSize = dbInfo.mapSize,
            CellSize = dbInfo.cellSize,
            MaxLevel = dbInfo.level,
            Location = dbInfo.location // Not sure if this should be here. Could be practical in scenarios where the tile server is hosted locally.
        };}

它工作正常，看起来像这样:

<?xml version="1.0" encoding="utf-8"?>
<TileMapServicesObject xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <TileMapService>
   <Title>EivaTMS</Title>
    <Abstract>Something clever about this service</Abstract>
    <TileMaps>
      <TileMap>
        <Title>kraken.db</Title>
        <href>10.10.100.200/kraken.db?request=getcapabilities</href>
        <Profile>global-mercator</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
    </TileMaps>
  </TileMapService>
</TileMapServicesObject>

现在，我要做的是创建一个 XML 文件，该文件描述了上述层之上的层。换句话说，我想要一个 XML 文件，其中包含我上面的每个 XML 文件的简短描述。

我已经设法完成了一些工作，如果我在值中进行硬编码，它将如下所示:

        public static void TileMapServicesCapabilities(int listBoxCount)
        {         

        TileMapServicesObject tmso = new TileMapServicesObject()
        {
            TileMapService = new TileMapService()
            {
                Title = "EivaTMS",
                Abstract = "Something clever about this service",
                TileMaps = new List<TileMap>
                {
                    new TileMap { Title = "title1", href = "http://title1/?request=getcapabilities", Profile = "global-mercator", SRS = "OSGEO:41001"},
                    new TileMap { Title = "title2", href = "http://title2/?request=getcapabilities", Profile = "global-mercator", SRS = "OSGEO:41001"},
                    new TileMap { Title = "title3", href = "http://title3/?request=getcapabilities", Profile = "global-mercator", SRS = "OSGEO:41001"}
                }
            }
        };}

产生这个输出:

<?xml version="1.0" encoding="utf-8"?>
<TileMapServicesObject xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <TileMapService>
    <Title>EivaTMS</Title>
    <Abstract>Something clever about this service</Abstract>
    <TileMaps>
      <TileMap>
        <Title>title1</Title>
        <href>http://title1/?request=getcapabilities</href>
        <Profile>global-mercator</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
      <TileMap>
        <Title>title2</Title>
        <href>http://title2/?request=getcapabilities</href>
        <Profile>global-mercator</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
      <TileMap>
        <Title>title3</Title>
        <href>http://title3/?request=getcapabilities</href>
        <Profile>global-mercator</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
    </TileMaps>
  </TileMapService>
</TileMapServicesObject>

现在，我要做的是动态创建和添加元素。这意味着对于我通过第一种方法 TileMapCapabilities 创建的每个 XML 文件，我想创建一个对象并将其添加到 TileMapServicesObject。可能还值得一提的是，类的外观如何包含正在创建的对象中的信息:

    public class TileMapServicesObject
    {
        public TileMapService TileMapService { get; set; }
    }

    public class TileMapService
    {
        public string Title { get; set; }
        public string Abstract { get; set; }
        public List<TileMap> TileMaps { get; set; }
    }

    public class TileMap
    {
        public string Title { get; set; }
        public string href { get; set; }
        public string Profile { get; set; }
        public string SRS { get; set; }
    }

我一直在尝试使用 foreach 循环为我添加到服务中的每个 TileMap 创建一个 TileMap 对象，但这只是为每次迭代创建一个新的 TileMapServicesObject，而不是包含所有对象的单个文件。

关于如何解决这个问题的任何提示？如果我的请求在当前形式中过于模糊，请告诉我。

---

编辑:原来只是盯着它看了足够长的时间才修复它!

这是更新后的代码:

public static void TileMapServicesCapabilities()
    {
        TileMapServicesObject tmso = new TileMapServicesObject();
        List<string> pathList = new List<string>(); 
        pathList = Directory.GetFiles(path + @"Tilemaps\").ToList();
        List<TileMap> tmList = new List<TileMap>();
        TileMap tm = new TileMap();
        string title = "";
        string profile = "";
        string srs = "";

        foreach (var p in pathList)
        {
            var xRead = XDocument.Load(p);

            var xd = (from el in xRead.Descendants("TileMapObject")
                    select new 
                    {
                        Title = el.Element("Title").Value,
                        Profile = el.Element("Profile").Value,
                        SRS = el.Element("SRS").Value
                    }).SingleOrDefault();

            title = xd.Title;
            profile = xd.Profile;
            srs = xd.SRS;

            tm = new TileMap()
            {
                Title = title,
                Profile = profile,
                SRS = srs,
                href = "http://10.10.100.200/" + title + "?request=getcapabilities"
            };

            tmList.Add(tm);
        }

        tmso = new TileMapServicesObject()
        {
            TileMapService = new TileMapService()
            {
                Title = "EivaTMS",
                Abstract = "Something clever about this service",
                TileMaps = tmList
            }
        };

这给了我这个漂亮的 XML 文件:

    <?xml version="1.0" encoding="utf-8"?>
<TileMapServicesObject xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <TileMapService>
    <Title>EivaTMS</Title>
    <Abstract>Something clever about this service</Abstract>
    <TileMaps>
      <TileMap>
        <Title>title1</Title>
        <href>http://title1?request=getcapabilities</href>
        <Profile>local</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
      <TileMap>
        <Title>title2</Title>
        <href>http://title2?request=getcapabilities</href>
        <Profile>local</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
      <TileMap>
        <Title>title3</Title>
        <href>http://title3?request=getcapabilities</href>
       <Profile>local</Profile>
       <SRS>OSGEO:41001</SRS>
      </TileMap>
      <TileMap>
        <Title>title4</Title>
        <href>http://title4?request=getcapabilities</href>
        <Profile>local</Profile>
        <SRS>OSGEO:41001</SRS>
      </TileMap>
    </TileMaps>
  </TileMapService>
</TileMapServicesObject>

Answer 1

好吧，在盯着它看了好几个小时之后，我设法解决了这个问题!

事实证明，我可以创建一个 foreach()，在其中遍历我想要读取的所有文件，创建一个 TileMap 对象并将其添加到一个列表，然后我在 foreach() 之后将其写入 XML。我已经用我的新代码更新了 OP。