DataContract名称属性不使用Json Serializer

Question

我只构建一个JSON WepApi,我有一个返回列表的控制器.我用Datacontract/Datamember属性装饰了列表,如下所示:

[DataContract(Name = "Files", Namespace = "http://schemas.example.com")]
    public class FileDesc
    {
       [DataMember(Name = "MyFileName")]
       public string Name { get; set; }
       [DataMember(Name = "MyFilePath")]
       public string Path { get; set; }
       [DataMember(Name = "MyFileSize")]
       public long? Size { get; set; }
       public FileDesc(string n, string p, long? s)
       {
           Name = n;
           Path = p;
           Size = s;
       }
   }

在我的控制器中,我返回如下列表:

// Response
List<FileDesc> FileList  = new List<FileDesc>();
foreach (MultipartFileData file in provider.FileData)
{
  FileList.Add(new FileDesc(file.Headers.ContentDisposition.FileName, file.LocalFileName , file.Headers.ContentDisposition.Size ));
}
return FileList;

但是在JSON输出中,缺少列表的Name属性:

[
  {
    "myFileName": "\"ArduinoUNO.png\"",
    "myFilePath": "c:\\images\\ArduinoUNO.png",
    "myFileSize": null
  }
]

要强制仅JSON输出,我已删除Global.asax上的xml格式化程序:

//Only JSON
var formatters = GlobalConfiguration.Configuration.Formatters;
formatters.Remove(formatters.XmlFormatter);

提前致谢

Answer 1

数组在JSON中没有自己的名称.如果要在列表中使用名称,则需要一个具有命名属性的外部对象来保存列表.

像这样的东西:

public class Response
{
    [DataMember(Name = "Files")]
    List<FileDesc> FileList { get; set; }
}

然后JSON看起来像这样:

{
    "Files": 
    [
        {
            "myFileName": "\"ArduinoUNO.png\"",
            "myFilePath": "c:\\images\\ArduinoUNO.png",
            "myFileSize": null
        }
    ]
}