如何在 WebAPI 后端 C# 上接收 JSON 数据? [英] How to receive JSON data on WebAPI backend C#?

问题描述

如何在 C# 中的 WebAPI 后端接收 JSON 数据?

How do I receive JSON data on my WebAPI backend in C#?

我从 JavaScript 前端发送了以下 JSON.

I have the following JSON sent from my JavaScript frontend.

{
    "User_Id": 1,
    "TotalPrice": 35,
    "DeliveryAddress": "At my house",
    "CartItems": [
        {
            "Id": 1009,
            "Name": "Superman juni 2014",
            "Quantity": 1,
            "Price": 35
        }
    ]
}

我有这门课:

public class PurchaseOrder
    {        
        public List<CartItem> CartItems { get; set; }
        public string DeliveryAddress { get; set; }
        public int TotalPrice { get; set; }
        public int User_Id { get; set; }
    }
public class CartItem
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public int Quantity { get; set; }
        public int Price { get; set; }
    }

还有我的 WebAPI 方法:

And my WebAPI method:

[System.Web.Mvc.HttpPost]
        public bool AddOrder(PurchaseOrder order)
        {
            // Here I will do something

            return true;
        } 

对于我的PurchaseOrder 订单"对象，我只得到null"作为结果.问题是我正在使用 [System.Web.Mvc.HttpPost] 吗?我也试过 [System.Web.Http.HttpPost]，但得到相同的结果.//马丁

I only get "null" as the result for my "PurchaseOrder order" object. Can the problem be that I´m using [System.Web.Mvc.HttpPost]? I have also tried [System.Web.Http.HttpPost], but get the same result. // Martin

推荐答案

你的请求的Content-Type应该是"application/json"

如果您将 json 发布到请求正文中，则将方法签名更改为

If you post your json in a body of the request than change a method signature to

[HttpPost]
public bool AddOrder([FromBody] PurchaseOrder order)
{
}

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