.Net Core 2.0 Web API解决跨域问题：Access to fetch at "***(URL)" from origin "***" has been blocked by CORS policy

这些天做了个需求，需要做个网页展示生产相关数据，数据源已经确定了，于是迅速写好了webapi接口。

前端的话，我用Vue.js在调用webapi时，报了个错误：

Access to fetch at "***(URL)" from origin "***" has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource...

搜索了一下大概了解是跨域问题，怎么解决呢？

也很简单，

在Startup.cs的ConfigureServices函数加上

services.AddCors(x => x.AddPolicy("AllowCors", d => d.AllowAnyOrigin().AllowAnyMethod()));

在Controller加上EnableCors属性

[EnableCors("AllowCors")]

这样用Vue.js调用时就正常了