跨域问题

在system.webServer节点下加上

<httpProtocol>
            <customHeaders>
                <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET" />
                <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type" />
                <add name="Access-Control-Allow-Origin" value="*" />               
            </customHeaders>
        </httpProtocol>