MVC接口跨域问题

在web.config里system.webServer节点添加一下代码

<httpProtocol>
      <customHeaders>
        <!-- 跨域 -->
        <remove name="Access-Control-Allow-Origin" />
        <remove name="Access-Control-Allow-Headers" />
        <remove name="Access-Control-Allow-Methods" />
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="Content-Type" />
        <add name="Access-Control-Allow-Methods" value="*" />
      </customHeaders>
</httpProtocol>