.net解决跨域问题

把下面的代码放在web.config文件中的 system.webServer 节点下

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

如果没有system.webServer节点  就在  </system.web>下面创建一个system.webServer

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

原文：https://www.cnblogs.com/yutang-wangweisong/p/13657267.html