Ajax 請求請求 MVC WebAPI跨域問題；XMLHttpRequest cannot load

問題：XMLHttpRequest cannot load http://192.168.1.4:9010//api/contacts. The 'Access-Control-Allow-Origin' header contains the invalid value '1'. Origin 'http://192.168.1.4:9011' is therefore not allowed access.

第一種解決方法：IIS 配置 就能夠了, 選中站點後選擇 Http 響應頭 ,右側選擇添加,

Access-Control-Allow-Origin , 值設置