查询字符串中的C#Web API可选参数

本文介绍了查询字符串中的C#Web API可选参数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的控制器中有这段代码:

I have this piece of code in my controller:

[HttpGet] [Route("team={team}&model={model}&date={date}&distance={distance}")] public IHttpActionResult FindVehicle([FromUri]string team = "", [FromUri]string model = "", [FromUri]DateTime? date = null, [FromUri]double distance = 0.0) { }

查询字符串的所有参数都是可选的，这就是为什么我使用默认值.

All of the parameters of the query string can be optional, which is why I used the default values.

但是，我不确定路由应该是什么，因为现在，例如，当我不指定 model 参数时，其在端点中的值最终为"model"，而不是"".

However, I am not sure what the route should be, since now, when I don't specify the model parameter for example, its value in the endpoint ends up being "model", and not "".

推荐答案

您不必在 Route 属性内定义 FromUri 元素，它们将不受约束盒子:

You don't have to define FromUri elements inside Route attribute, they will be bound out of the box:

[HttpGet] [Route("route_name")] public IHttpActionResult FindVehicle([FromUri]string team = "", [FromUri]string model = "", [FromUri]DateTime? date = null, [FromUri]double distance = 0.0) { }

如果使用的是ASP.Net Core，则应改用 [FromQuery]

If you are using, ASP.Net Core, then you should use [FromQuery] instead