C# webservice设置可跨域访问

转载：https://blog.csdn.net/xwl1992/article/details/79969504

在webservice项目的web.config中添加如下配置，缺一不可：

<system.web>
   <webServices>
      <protocols>
        <add name="HttpGet"/>
        <add name="HttpPost"/>
        <add name="HttpSoap"/>
        <add name="Documentation"/>
      </protocols>
    </webServices>
  </system.web>
  <system.webServer>
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Methods" value="OPTIONS,POST,GET"/>
        <add name="Access-Control-Allow-Headers" value="x-requested-with,content-type"/>
        <add name="Access-Control-Allow-Origin" value="*"/>
      </customHeaders>
    </httpProtocol>
  </system.webServer>

测试无问题。