如何用Birt开发报表并在ASP.NET中使用？

I am tottaly a new bie in Reporting. My problem is , I need to use Birt for reporting in ASP.NET . But seems that Birt is only available in Java. I don't know how to use it in ASP.NET . I don't want to use Crystal reports as Its not free. I am tottaly a new bie in Reporting. My problem