Without makes and model numbers it is impossible to give you an specific answer.
In general you would connect the Dish box and BD to your surround sound with HDMI. The HDMI out of the surround sound would connect to HDMI in on your TV.
If your surround sound did not have HDMI then you would use an HDMI switcher with audio extraction like this one http/www.monoprice.com/Product?p_id=5557&kpid=105557&gclid=CPPY2sLnwcYCFYIXHwodhY0FTw
to provide audio. If you use the tuner or smart functions of your TV then you would also need an audio output for those.