通過LINQ從XML反序列化

所以，我有 XML 檔案：

<?xml version="1.0" encoding="utf-8"?>
<RailwayStations>
  <RailwayStation />
  <RailwayStationName>Verdansk</RailwayStationName>
  <RailwayStationCountOfWays>10</RailwayStationCountOfWays>
  <RailwayStationCountOfLuggageRooms>3</RailwayStationCountOfLuggageRooms>
  <RailwayStationLuggageRoomHeight>10</RailwayStationLuggageRoomHeight>
  <RailwayStationLuggageRoomWidth>20</RailwayStationLuggageRoomWidth>
  <RailwayStationLuggageRoomDepth>30</RailwayStationLuggageRoomDepth>
  <RailwayStationLuggageRoomHeight>11</RailwayStationLuggageRoomHeight>
  <RailwayStationLuggageRoomWidth>21</RailwayStationLuggageRoomWidth>
  <RailwayStationLuggageRoomDepth>31</RailwayStationLuggageRoomDepth>
  <RailwayStationLuggageRoomHeight>12</RailwayStationLuggageRoomHeight>
  <RailwayStationLuggageRoomWidth>22</RailwayStationLuggageRoomWidth>
  <RailwayStationLuggageRoomDepth>32</RailwayStationLuggageRoomDepth>
</RailwayStations>

而且，我想從中閱讀。我下面的代碼向所有欄位回傳 null

var xDoc = XDocument.Load(fileName);

            var obj = from xElement in xDoc.Element("RailwayStations")?.Elements("RailwayStation")
                select new RailwayStation()
                {
                    RailwayStationName = xElement.Element("RailwayStationName")?.Value,
                    RailwayStationCountOfWays = Convert.ToInt32(xElement.Element("RailwayStationCountOfWays")?.Value),
                    RailwayStationCountOfLuggageRooms =
                        Convert.ToInt32(xElement.Element("RailwayStationCountOfLuggageRooms")?.Value),
                    
                    LuggageRooms = (from element in xDoc.Element("RailwayStations")?.Elements("RailwayStation")
                        select new LuggageRoom()
                        {
                            _luggageRoomHeight = Convert.ToInt32(element.Element("RailwayStationLuggageRoomHeight")?.Value),
                            _luggageRoomWidth = Convert.ToInt32(element.Element("RailwayStationLuggageRoomHeight")?.Value),
                            _luggageRoomDepth = Convert.ToInt32(element.Element("RailwayStationLuggageRoomHeight")?.Value),
                        }).ToList()
                };
            return obj;

有什么建議？關于XML檔案-它創造了通過自制的方法，在這里我想補充XElements到XDocument并保存。

uj5u.com熱心網友回復：

根據您的代碼中的期望，您的 XML 似乎格式不正確，這就是您的代碼所期望的：

<?xml version="1.0" encoding="utf-8"?>
<RailwayStations>
  <RailwayStation>
    <RailwayStationName>Verdansk</RailwayStationName>
    <RailwayStationCountOfWays>10</RailwayStationCountOfWays>
    <RailwayStationCountOfLuggageRooms>3</RailwayStationCountOfLuggageRooms>
    <LuggageRooms>
      <LuggageRoom>
        <RailwayStationLuggageRoomHeight>10</RailwayStationLuggageRoomHeight>
        <RailwayStationLuggageRoomWidth>20</RailwayStationLuggageRoomWidth>
        <RailwayStationLuggageRoomDepth>30</RailwayStationLuggageRoomDepth>          
      </LuggageRoom>
      <LuggageRoom>
        <RailwayStationLuggageRoomHeight>11</RailwayStationLuggageRoomHeight>
        <RailwayStationLuggageRoomWidth>21</RailwayStationLuggageRoomWidth>
        <RailwayStationLuggageRoomDepth>31</RailwayStationLuggageRoomDepth>         
      </LuggageRoom>
      <LuggageRoom>
        <RailwayStationLuggageRoomHeight>12</RailwayStationLuggageRoomHeight>
        <RailwayStationLuggageRoomWidth>22</RailwayStationLuggageRoomWidth>
        <RailwayStationLuggageRoomDepth>32</RailwayStationLuggageRoomDepth>       
      </LuggageRoom>
    </LuggageRooms>
  </RailwayStation>
  <RailwayStation>
    <RailwayStationName>Number 2</RailwayStationName>
    <RailwayStationCountOfWays>8</RailwayStationCountOfWays>
    <RailwayStationCountOfLuggageRooms>1</RailwayStationCountOfLuggageRooms>
    <LuggageRooms>
      <LuggageRoom>
        <RailwayStationLuggageRoomHeight>12</RailwayStationLuggageRoomHeight>
        <RailwayStationLuggageRoomWidth>22</RailwayStationLuggageRoomWidth>
        <RailwayStationLuggageRoomDepth>32</RailwayStationLuggageRoomDepth>          
      </LuggageRoom>
    </LuggageRooms>
  </RailwayStation>
</RailwayStations>

現在請注意，RailwayStations（復數）現在有多個名為 的子元素RailwayStation。行李間也是如此，無論如何，代碼實際上對這些做出了錯誤的假設，但資料的結構應該使每個行李間都包含在一個外部元素中，在這個例子中我稱之為LuggageRooms

var xDoc = XDocument.Load(fileName);
var obj = from xElement in xDoc.Element("RailwayStations")?.Elements("RailwayStation")
          select new RailwayStation()
          {
              RailwayStationName = xElement.Element("RailwayStationName")?.Value,
              RailwayStationCountOfWays = Convert.ToInt32(xElement.Element("RailwayStationCountOfWays")?.Value),
              RailwayStationCountOfLuggageRooms =
                Convert.ToInt32(xElement.Element("RailwayStationCountOfLuggageRooms")?.Value),
            
              LuggageRooms = (from element in xElement.Elements("LuggageRooms")
                select new LuggageRoom()
                {
                    _luggageRoomHeight = Convert.ToInt32(element.Element("RailwayStationLuggageRoomHeight")?.Value),
                    _luggageRoomWidth = Convert.ToInt32(element.Element("RailwayStationLuggageRoomWidth")?.Value),
                    _luggageRoomDepth = Convert.ToInt32(element.Element("RailwayStationLuggageRoomDepth")?.Value),
                }).ToList()
          };
return obj;

看起來你在這里有一個XY 問題，如果你也在構建 XML，請檢查那里的邏輯以確保它有意義。

如果您正在構建此 XML，請考慮使用更簡單的命名元素的模式：

 <RailwayStation>
   <Name>Number 2</Name>
   <CountOfWays>8</CountOfWays>
   <CountOfLuggageRooms>1</CountOfLuggageRooms>
   <LuggageRooms>
     <LuggageRoom>
       <Height>12</Height>
       <Width>22</Width>
       <Depth>32</Depth>          
     </LuggageRoom>
   </LuggageRooms>
 </RailwayStation>

那么你的代碼可能是這樣的：

 var xDoc = XDocument.Load(fileName);
 var obj = from xElement in xDoc.Element("RailwayStations")?.Elements("RailwayStation")
           select new RailwayStation()
           {
               Name = xElement.Element("Name")?.Value,
               CountOfWays = Convert.ToInt32(xElement.Element("CountOfWays")?.Value),
               CountOfLuggageRooms = Convert.ToInt32(xElement.Element("CountOfLuggageRooms")?.Value),
             
               LuggageRooms = (from element in xElement.Elements("LuggageRooms")
                 select new LuggageRoom()
                 {
                     Height = Convert.ToInt32(element.Element("Height")?.Value),
                     Width = Convert.ToInt32(element.Element("Width")?.Value),
                     Depth = Convert.ToInt32(element.Element("Depth")?.Value),
                 }).ToList()
           };
 return obj;

我意識到這是一個重大的結構變化，但它將簡化所有未來的處理并減少通過線路的位元組。

標籤：C＃ xml 林克 连载 反序列化

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