C#Web API POST参数FromBody始终为null [英] C# Web API POST parameter FromBody is always null

问题描述

我已经在网上搜索了几个小时，并尝试了许多不同的解决方案，这些解决方案也在StackOverflow上进行了介绍.我知道以前也曾问过类似的问题，但是没有答案或评论对我有用.

I've been scouring the web for hours and tried many different solutions also described here on StackOverflow. I know similar questions have been asked before, but none of the answers or comments have worked for me.

问题:我有一个.NET Web API，该API带有一些参数的后方法. 参数之一是应该从主体读取的复杂对象(即JSON).但是，此对象始终为空.

The problem: I have a .NET Web API that has a Post-method with some parameters. One of the parameters is a complex object that is supposed to be read from the body (that is JSON). However, this object is always null.

这是我的代码:

// POST api/worksheets/post_event/true/false
        [Route("post_event/{newWorksheet}/{eindEvent}")]
        [HttpPost]
        public Event Post(bool newWorksheet, bool eindEvent, [FromBody] Event eventData)
        {
            return eventData;
        }

要明确:eventData是始终为null的对象.布尔值可以正确读取.

To be clear: eventData is the object that's always null. The boolean values are read correctly.

完整的请求正文为:

POST http://localhost:5000/api/worksheets/post_event/true/false
Content-Type: application/json
{"Persnr":1011875, "WorksheetId":null, "Projectnr":81445, "Uursoort":8678, "Tijd":{"09-08-2016 9:25"}}

作为参考，这是事件类:

And for reference, this is the Event-class:

public class Event
    {
        public long Persnr { get; set; }
        public int WorksheetId { get; set; }
        public int Projectnr { get; set; }
        public int Uursoort { get; set; }
        public DateTime Tijd { get; set; }
    }

我已经尝试过的一些东西:

Some of the things I've already tried:

• 将JSON更改为不同的格式(只有值，"Event":{}围绕实际对象，JSON前面是=).
• 仅使用Event参数进行测试(删除其他参数以及在路线中)
• 向事件添加默认ctor.
• 删除[FromBody]标签.如果执行此操作，则Event-object不为null，但所有属性均为null.可以通过URI填充属性，但这不是所需的行为.

根据我已阅读的所有解决方案和文档，它应该可以像上面显示的那样简单地工作. 我想念什么?

According to all solutions and documentation I have read, it should simply work the way I have it displayed above. What am I missing?

推荐答案

您的json对象无效.我的建议是始终运行通过json解析器手动编写的json对象，如下所示: http://json.parser.online .fr/

Your json object is invalid. My suggestion is to always run json object written manually through a json parser like this: http://json.parser.online.fr/

"Tijd":{"09-08-2016 9:25"}

应该是

"Tijd":["09-08-2016 9:25"]

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