Asp.Net WebApi 启用CORS跨域访问指定多个域名

        //支持客户端凭据提交,指定多个域名，使用逗号隔开
        [EnableCors("http://localhost:51421,http://localhost:51422 ", "*", "*", SupportsCredentials = true)]
        //支持客户端凭据提交
        //[EnableCors("http://localhost:51421", "*", "*", SupportsCredentials = true)]
        //[EnableCors("http://localhost:51421", "*", "*")]
        // [EnableCors("*", "*", "*")]
        public string GetOne()
        {
            //Microsoft.Owin.Cors.CorsOptions
            return CookieHelper.GetString("username");
        }