c# - 接受列表参数的 odata 操作始终为 null

Question

我的 odata Controller 有问题。

我想发送一个地址对象列表，但接收到的参数总是空的。

我的终点是这样的:

    [EnableQuery]
    public IHttpActionResult SetCoordinatesOnAddressList(IEnumerable<Address> addresses)
    {
        var result = addresses.Select(address => _coordinates.GetAddressCoordinates(address)).ToList();
        return Ok(result);
    } 

我在 WebApiConfig 中设置了这个

builder.EntityType<Address>().Collection
            .Action("SetCoordinatesOnAddressList")
            .ReturnsFromEntitySet<Address>("Addresses");

我正在使用 Postman 发送请求。

我的请求作为后请求发送，如下所示:

[{"StreetName":"Some street","StreetNumber":"8","ZipCode":1234,"Town":"Some town"}]

我有一个不同的端点，它采用单个地址而不是 IEnumerable，并且使用相同的 json 请求(没有 [])，因此 json 中的字段是正确的。

总结一下:我的 IEnumerable 端点总是收到 null。知道是什么原因造成的吗？

谢谢。

编辑:

我尝试更改我的端点以接受 AddressDTO，如下所示:

public IHttpActionResult SetCoordinatesOnAddressList(AddressDTO addresses)
{
    return Ok(2);
}

这是一个 AddressDTO:

public class AddressDTO
{
    public IEnumerable<Address> Addresses { get; set; }
}

如果我尝试发布这个:

{"Addresses": [{"StreetName":"Some street","StreetNumber":"8","ZipCode":1234,"Town":"Some town"}]}

我收到这个错误:

{
  "error": {
    "code": "",
    "message": "The request entity's media type 'application/json' is not supported for this resource.",
    "innererror": {
      "message": "No MediaTypeFormatter is available to read an object of type 'AddressDTO' from content with media type 'application/json'.",
      "type": "System.Net.Http.UnsupportedMediaTypeException",
      "stacktrace": "   at System.Net.Http.HttpContentExtensions.ReadAsAsync[T](HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)\\\r\\\n   at System.Net.Http.HttpContentExtensions.ReadAsAsync(HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)\\\r\\\n   at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)"
    }
  }
}

Answer 1

如果像这样将集合作为对象上名为地址的属性发送，会发生什么情况？

{"addresses": [{"StreetName":"Some street","StreetNumber":"8","ZipCode":1234,"Town":"Some town"}]}