C#中[FromBody]属性的功能是什么? [英] What is the function of [FromBody] Attribute in C#?

问题描述

是否具有 [FromBody] 属性的功能?我的意思是，例如，当我使用它时:

Is there a function of [FromBody] attribute? I mean, when I use it for example:

公共异步任务SetUser([FromBody]用户)

当我使用时:

公共异步任务SetUser(用户)

服务器获取同一对象没有问题，因此，有必要对其进行设置，或者我可以不用担心删除它吗?

The server get the same object without problems, so, it's necessary set it, or I can remove it without worries?

礼物！

推荐答案

User 是复杂类型，因此默认情况下，服务器将尝试从请求正文中解析它.如果您输入的是简单类型，例如

User is a complex type, so by default the server will try to resolve it from the request body. If you had a simple type -- e.g.

public async Task SetUser(string userId)

服务器将尝试通过URL绑定解析该值.您可以通过指定

the server would try to resolve the value via URL binding. You can override that behaviour by specifying

public async Task SetUser([FromBody] string userId)

通常出于可读性考虑，我通常将 [FromBody] 留在签名中.

I usually leave [FromBody] in the signature simply for the sake of readability.

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