has been blocked by CORS policy: No 'Access-Control-Allow-Origin'

has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

web.config dosyasına aşağıdaki kodu ekleyin. 

<system.webServer>
<httpProtocol>
    <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
    </customHeaders>
</httpProtocol>
.....