asp.net webApi 支持js的跨域请求

只需要在web.config的 system.webServer 添加一下代码即可

<httpProtocol>
    <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE" />
    </customHeaders>
</httpProtocol>