C#WebService 出现No 'Access-Control-Allow-Origin' header is present on the requested resource

C#WebService 出现No 'Access-Control-Allow-Origin' header is present on the requested resource

解决办法：

在config里面加上以下代码即可解决

 <system.webServer>
    <httpProtocol>
        <customHeaders>
           <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>
            <add name="Access-Control-Allow-Headers" value="x-requested-with"/>
           <add name="Access-Control-Allow-Origin" value="*" />//表示允许所有来源进行跨域访问
        </customHeaders>
   </httpProtocol>
 </system.webServer>