私有云：

需要再webconfig 中配置

<system.webServer>

<httpProtocol>

<customHeaders>

<add name="Access-Control-Allow-Origin" value="*" />

<add name="Access-Control-Allow-Headers" value="Content-Type" />

<add name="Access-Control-Allow-Methods" value="GET, POST,OPTIONS" />

</customHeaders>

</httpProtocol>

<system.webServer>