ASP.Net 控制器不正确地反序列化嵌套对象列表

Question

我有以下 C# 类型定义：

public class GraphicSubmission
    {
        public string Title { get; set; }
        public string Description { get; set; }
        public string Byline { get; set; }
        public string BylineTitleId { get; set; }
        public string BylineTitleDescription { get; set; }
        public string Category { get; set; }

        public List<GraphicBinary> GraphicBinaries;

        public GraphicSubmission()
        {
            GraphicBinaries = new List<GraphicBinary>();
        }
    }

其中包括这些对象的嵌套列表：

   public class GraphicBinary
    {
        public SubmittedImageType ImageType { get; set; }
        public string OriginalFilename { get; set; }
        public string ItemId { get; set; }
        public string RecordId { get; set; }
        public int RecordSequenceNumber { get; set; }
    }

我有以下 Controller 方法，它将 GraphicSubmission 对象作为其参数之一：

        [HttpPost]
        public JsonResult Graphic(PhotoAction actionType, bool hid, GraphicSubmission graphicModel)

当我从 AngularJS 站点调用控制器方法时，在 HTTP POST 的正文中包含以下 JSON:

{
    "Title": "AP Poll Stay at Home Protest Approval",
    "Description": "A new UChicago Divinity School/AP-NORC poll finds that two-thirds of Democrats and about half of Republicans disapprove of recent protests of stay at home orders.;",
    "Byline": "F. Strauss",
    "BylineTitleDescription": "STAFF",
    "BylineTitleId": "STF",
    "Category": "a",
    "GraphicBinaries": [
        {
            "ImageType": "PrintGraphicAI",
            "ItemId": "dd142b48fe7c4cc6bf9b42c9c9402e7d",
            "RecordId": "dd142b48fe7c4cc6bf9b42c9c9402e7d",
            "RecordSequenceNumber": 0,
            "OriginalFilename": "ChicagoShootings.ai"
        },
        {
            "ImageType": "PrintGraphicJPEG",
            "ItemId": "ccce25ddc1cb45d898b09eb0d91fcecc",
            "RecordId": "ccce25ddc1cb45d898b09eb0d91fcecc",
            "RecordSequenceNumber": 0,
            "OriginalFilename": "ChicagoShootings.jpg"
        }
    ]
}

该方法被正确调用，但GraphicSubmission 对象的GraphicBinaries 字段始终为空。

鉴于 JSON 我希望它包含 2 个条目。

我的问题是我需要做什么才能 ASP.Net 正确反序列化嵌套对象列表？

我在这里看了一些相关文章，例如：

Deserialize JSON array(or list) in C#

Post JSON array to mvc controller

但其中 none 似乎掌握了解决此问题的关键。

Answer 1

正如评论指出的那样，GraphicSubmission class 中的 GraphicBinaries 字段需要通过添加 { get; 成为属性放; }.

这是一篇指出区别的文章：

What is the difference between a field and a property?

ASP.Net 控制器不正确地反序列化嵌套对象列表

ASP.Net Controller improperly Deserializing nested list of objects

c#

asp.net

json

deserialization

json-deserialization