EmitDefaultValue=false仅对字符串有效

本文关键字：字符串 有效 false EmitDefaultValue | 更新日期: 2023-09-27 18:04:09

我正在尝试将以下c#类序列化为XML 

[DataContract]
public class LatLonPoint
{
  [DataMember(IsRequired = true, Order = 1)]
  public float Lat { get; set; }
  [DataMember(IsRequired = true, Order = 2)]
  public float Lon { get; set; }
  [DataMember(EmitDefaultValue = false, Order = 3)]
  public DateTime? OptimalTime { get; set; }
}

当我使用以下代码序列化该类时

public static string GetLatLonPointXml(LatLonPoint data)
{
  XmlSerializer xmlSerializer = new XmlSerializer(data.GetType());
  using ( StringWriter stringWriter = new StringWriter() )
  {
    xmlSerializer.Serialize(stringWriter, data);
    return stringWriter.ToString();
  }
}

我得到以下结果

<?xml version="1.0" encoding="utf-16"?>
<LatLonPoint xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <Lat>30</Lat>
  <Lon>-97</Lon>
  <OptimalTime xsi:nil="true" />
</LatLonPoint>

当我添加了EmitDefaultValue到DataMember属性时，为什么要输出OptimalTime ?我已经能够让EmitDefaultValue与字符串一起工作，但不是其他任何东西。非常感谢您的帮助。

EmitDefaultValue=false仅对字符串有效

@Joe:谢谢!更改为DataContractSerializer修复了这个问题。现在我的序列化代码看起来像这样:

public static string GetXml(LatLonPoint data)
{
  DataContractSerializer serializer = new DataContractSerializer(data.GetType());
  using ( MemoryStream stream = new MemoryStream() )
  {
    serializer.WriteObject(stream, data);
    byte[] bytes = stream.ToArray();
    return Encoding.UTF8.GetString(bytes, 0, bytes.Length);
  }
}

现在的XML输出是:

<LatLonPoint xmlns="http://schemas.datacontract.org/2004/07/Mnc.Service.Model.External" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <Lat>30</Lat>
  <Lon>-97</Lon>
</LatLonPoint>
谢谢Joe和Mr.EXE!

Try This:

 [DataContractFormat]
 public class LatLonPoint
{
    public float Lat { get; set; }

    public float Lon { get; set; }

    public DateTime? OptimalTime { get; set; }
}
相关文章：