如何将应用程序的模型传递给Web服务以存储在db中？

I am creating a flex collection in which as model I have an array collection of slides.Each of the slide has a set of objects like array of images , array of captions etc . I want to pass these slides to the web service coded using asp.net and C# , from where it will be saved to a sql server db. Is there a way to send the image Array directly to the web service or I have to send each of the image separately by making as many calls to the web service as the number of images in the array . I am creating a flex collection in which as mod