1、在web.config文件中的 system.webServer 节点下 增加如下配置

1 <httpProtocol>
2             <customHeaders>
3                 <add name="Access-Control-Allow-Origin" value="*" />
4                 <add name="Access-Control-Allow-Headers" value="*" />
5                 <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE" />
6             </customHeaders>
7 </httpProtocol>