在C＃中將XML反序列化為類obj

Question

這是我在200多個此類條目的巨大XML文件中擁有的條目之一。

<TradeFills>
 <TradeFill>
  <Broker>xxx</Broker>
  <CustomerAccount/>
  <qwFillTransID>xxxxxxxxxxxxxxxxxxx</qwFillTransID>
  <qwPrevTransID>xxx</qwPrevTransID>
  <qwGroupTransID>xxxxxxxxxxxxxxxxx</qwGroupTransID>
  <GroupTransID>xxxxxxxx</GroupTransID>
  <TransID>x</TransID>
  <Service>xxxxxxxxxxxxxxxx</Service>
  <Symbol>xx</Symbol>
  <Exchange>xxxxx</Exchange>
  <InstClass>xxxxxxxx</InstClass>
  <InstSubClass>xxxxxxx</InstSubClass>
  <ContractSymbol>xxxx</ContractSymbol>
  <ExpirationDate>xxxxxxxx</ExpirationDate>
  <Month>xx</Month>
  <Year>xxxx</Year>
  <Strike>xxx</Strike>
  <TradePCU>xxxx</TradePCU>
  <Buy>x</Buy>
  <Quantity>xx</Quantity>
  <Price>xxxxx</Price>
  <FillTime>xxxxxxxxxxxxxxx</FillTime>
  <PosUpdated>xxxxxxxxxxx</PosUpdated>
  <Description/>
 </TradeFill>
</TradeFills>

我試圖將其反序列化為類對象，但每次都失敗。

到目前為止，這是我的代碼：

using System;

使用System.Collections.Generic; 使用System.Text; 使用System.IO; 使用System.Xml.Serialization;

命名空間DeserializeXML {公共類Program {

    // This is the class that will be deserialized.
    [Serializable()]
    public class TradeFill
    {
        [XmlElement("Broker")]
        public string broker;

        [XmlElement("qwFillTransID")]
        public string qwFillTransId;

        [XmlElement("qwPrevTransID")]
        public string qwPrevTransId;

        [XmlElement("qwGroupTransID")]
        public string qwGroupTransId;

        [XmlElement("GroupTransID")]
        public string GroupTransID;

        [XmlElement("TransID")]
        public string TransId;

        [XmlElement("Service")]
        public string Service;

        [XmlElement("Exchange")]
        public string Exchange;

        [XmlElement("InstClass")]
        public string InstClass;

        [XmlElement("InstSubClass")]
        public string InstSubClass;

        [XmlElement("ContractSymbol")]
        public string ConSymbol;

        [XmlElement("ExpirationDate")]
        public DateTime ExpDate;

        [XmlElement("Month")]
        public int month;

        [XmlElement("Year")]
        public int year;

        [XmlElement("Strike")]
        public double strike;

        [XmlElement("TradePCU")]
        public string TradePCU;

        [XmlElement("Buy")]
        public int buy;

        [XmlElement("Quantity")]
        public int quantity;

        [XmlElement("Price")]
        public double price;

        [XmlElement("FillTime")]
        public DateTime FillTime;

        [XmlElement("PosUpdated")]
        public string PosUpdated;

    }


    [XmlRootAttribute("TradeFills")]
    public class SIGTrades
    {
        [XmlElement("TradeFills")]
        public TradeFill[] TradeFills{ get; set; }
    }


    [Serializable()]
    public class Test
    {
         public static void Main()
        {
            Test t = new Test();
          // Read a purchase order.
            t.DeserializeObject("c:\\test.xml");
        }

        private void DeserializeObject(string filename)
        {   
            Console.WriteLine("Reading with Stream");
            // Create an instance of the XmlSerializer.
            XmlSerializer serializer =
            new XmlSerializer(typeof(TradeFill));
            // Reading the XML document requires a FileStream.
            Stream reader= new FileStream(filename,FileMode.Open);

            // Declare an object variable of the type to be deserialized.
            TradeFill i;

            // Call the Deserialize method to restore the object's state.
            i = (TradeFill)serializer.Deserialize(reader);

            // Write out the properties of the object.
            Console.Write(i.qwFillTransId);
        }
    }


}

}

當我執行它時，我只看到控制台上的“ Reading with Stream”，而沒有其他顯示。

編輯

我剛剛意識到我只說“用流閱讀”，因為它仍在閱讀。大約5秒鍾后，我得到了：

Unhandled Exception: System.InvalidOperationException: DeserializeXML.Program is
 inaccessible due to its protection level. Only public types can be processed.
   at System.Xml.Serialization.TypeDesc.CheckSupported()
   at System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo sourc
e, Boolean directReference, Boolean throwOnError)
   at System.Xml.Serialization.TypeScope.ImportTypeDesc(Type type, MemberInfo me
mberInfo, Boolean directReference)
   at System.Xml.Serialization.TypeScope.GetTypeDesc(Type type, MemberInfo sourc
e, Boolean directReference, Boolean throwOnError)
   at System.Xml.Serialization.ModelScope.GetTypeModel(Type type, Boolean direct
Reference)
   at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(Type type
, XmlRootAttribute root, String defaultNamespace)
   at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultName
space)
   at System.Xml.Serialization.XmlSerializer..ctor(Type type)
   at DeserializeXML.Program.Test.DeserializeObject(String filename) in c:\docum
ents and settings\sobti\my documents\visual studio 2010\Projects\DeserializeXML\
DeserializeXML\Program.cs:line 109
   at DeserializeXML.Program.Test.Main() in c:\documents and settings\sobti\my d
ocuments\visual studio 2010\Projects\DeserializeXML\DeserializeXML\Program.cs:li
ne 102

編輯

將我的Program類公開后，現在出現以下錯誤：

Unhandled Exception: System.InvalidOperationException: There was an error reflec
ting type 'DeserializeXML.Program.TradeFill'. ---> System.InvalidOperationExcept
ion: There was an error reflecting field 'GroupTransId'. ---> System.InvalidOper
ationException: The XML element 'qwGroupTransId' from namespace '' is already pr
esent in the current scope. Use XML attributes to specify another XML name or na
mespace for the element.
   at System.Xml.Serialization.XmlReflectionImporter.AddUniqueAccessor(INameScop
e scope, Accessor accessor)
   at System.Xml.Serialization.XmlReflectionImporter.AddUniqueAccessor(MemberMap
ping member, INameScope elements, INameScope attributes, Boolean isSequence)
   at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(Str
uctMapping mapping, StructModel model, Boolean openModel, String typeName, Recur
sionLimiter limiter)

編輯

對我的代碼做了很多更改（如上所示）。 有兩次列出一些項目，仔細檢查大小寫等。我現在收到此錯誤：

Unhandled Exception: System.InvalidOperationException: There is an error in XML
document (2, 2). ---> System.InvalidOperationException: <TradeFills xmlns=''> wa
s not expected.
   at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationReaderTradeF
ill.Read3_TradeFill()
   --- End of inner exception stack trace ---

Answer 1

嘗試更改此：

class Program
    {

對此

public class Program
    {

如果您未指定訪問修飾符，則它將使用默認值internal

Answer 2

這是一個反序列化函數，它需要一個XML字符串。

public %object% DeserializeGSFiles(string content)
    {
        Type type = typeof(%object%);
        XmlSerializer xmlSerializer;
        byte[] byteArray = Encoding.UTF8.GetBytes(content);
        MemoryStream stream = new MemoryStream(byteArray);
        try
        {
            xmlSerializer = new XmlSerializer(type);
            %object% objectFromXml = (%object%)xmlSerializer.Deserialize(stream);
            return objectFromXml;
        }
        catch (Exception Ex)
        {
            throw Ex;
        }
    }

將％object％替換為您的class object。

Answer 3

1. 元素qwGroupTransId被提及兩次。 您將其放在自己的元素中，並作為GroupTransId的名稱，因此解串器不知道將值放置在何處。
2. 您的FillTime值無效。
3. 您正在嘗試反序列化TradeFill ，但實際的xml是CarCollection 。

Answer 4

1. xml中的大小寫很重要。 一些XmlElement標簽的大小寫與來源不同。
2. 在代碼中構造一個類Program的測試對象，並將其序列化。 將結果與您的來源進行比較，以了解錯誤之處。

Answer 5

對於第二次編輯，您需要執行以下操作：

        // ... 

        [XmlElement ("qwGroupTransId")] // Or just leave off
        public string qwGroupTransId;

        [XmlElement ("GroupTransId")] // Or just leave off
        public string GroupTransId;

        // ...

Answer 6

我曾經遇到XmlSerializer中的一個錯誤，該錯誤在某些情況下顯然不喜歡嵌套元素的大量列表，並給出與您觀察到的相同的症狀。

那時我發現了一個確認，但是我找不到鏈接了。 在這里 （向下滾動到約翰·桑德的答案），您可以了解有關該問題的信息。