MVC 5中的Access-Control-Allow-Origin

Question

对预检请求的响应没有通过访问控制检查：否＆＃39;访问控制 - 允许 - 来源＆＃39;标头出现在请求的资源上。响应的HTTP状态代码为500。

Answer 1

In startup.auth.cs add the following code at the start of the ConfigureAuth method. You will need to install this Microsoft.Owin.Cors nuget package.

app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);