CORS所请求的资源上没有“ Access-Control-Allow-Origin”标头

Question

我收到以下错误：

XMLHttpRequest cannot load http://localhost:62574/ServiceClass.asmx?op=loadMarkersViaWebService. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:15540' is therefore not allowed access. 

因此我在Web.Config中添加了以下内容，但错误仍然存​​在：

<system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules runAllManagedModulesForAllRequests="true"/>
<httpProtocol>
  <customHeaders>
    <add name="Access-Control-Allow-Origin" value="http://localhost:15540/"/>
  </customHeaders>
</httpProtocol>

Answer 1

尝试使用此。

<httpProtocol>
 <customHeaders>
   <add name="Access-Control-Allow-Origin" value="*" />
   <add name="Access-Control-Allow-Headers" value="Content-Type, Accept" />
 </customHeaders>
</httpProtocol>