Asp.net Core 2 API POST对象是否为NULL? [英] Asp.net Core 2 API POST Objects are NULL?

问题描述

我有一个带有某些测试功能的.net Core 2 API设置. (Visual Studio 2017)

I have a .net Core 2 API setup with some test function. (Visual Studio 2017)

使用邮递员，我将原始数据发布到该方法中，但是模型只是空白吗?为什么?

Using postman I do a post with the raw data to that method, but the model is just blank? Why?

        // POST api/Product/test
        [HttpPost]
        [Route("test")]
        public object test(MyTestModel model)
        {
            try
            {
                var a = model.SomeTestParam;

                return Ok("Yey");
            }
            catch (Exception ex)
            {
                return BadRequest(new { message = ex.Message });
            }
        }

        public class MyTestModel
        {
            public int SomeTestParam { get; set; }

        }

推荐答案

您需要在模型中包含[FromBody]属性:

You need to include the [FromBody] attribute on the model:

[FromBody] MyTestModel model

有关更多信息，请参见安德鲁·洛克(Andrew Lock)的帖子 :

See Andrew Lock's post for more information:

为了在ASP.NET Core中正确绑定JSON，必须修改操作以在参数上包含属性[FromBody].这告诉框架使用请求的内容类型标头来决定使用哪个已配置的IInputFormatter进行模型绑定.

In order to bind the JSON correctly in ASP.NET Core, you must modify your action to include the attribute [FromBody] on the parameter. This tells the framework to use the content-type header of the request to decide which of the configured IInputFormatters to use for model binding.

正如@anserk在评论中指出的，这还要求将Content-Type标头设置为application/json.

As noted by @anserk in the comments, this also requires the Content-Type header to be set to application/json.

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