net core静态文件允许跨域访问。net core设置静态资源Access-Control-Allow-Origin*

code:

//app.UseStaticFiles();
app.UseStaticFiles(new StaticFileOptions
            {
                OnPrepareResponse = (c) =>
                {
                    c.Context.Response.Headers.Add("Access-Control-Allow-Origin", "*");
                }
            });

注意把以前那个app.UseStaticFiles()注释掉，不然修改不会生效