I am having a sony blue ray dvd home thatre bdv e280 bought from switzerland and I came to India which I wan't to play some dvd's bought from India which is is blocked of region code. How to unlock the region code and can watch the movies bought from India playing in this dvd player.?

There is a place where you can find exactly how to hack you are Blu-Ray player to make it region free, and that is the VideoHelp forum. Go to the forum, and then go to the DVD hack section.
You can check more solutions here:
3 ways on how to make your Blu-ray player region free

There's a simple way to watch the movies without having to worry about the region codes being an issue: try ripping the Blu-ray movies you have to MP4 or other videos. It's simpler than resetting the region code. How to Rip and Convert Blu ray to MP4 with Blu ray to MP4 Converter

Works with most Sony Players

Step 1
Unplug the power cord of the Sony Blu-ray player. Plug the power cord back in. Turn on the Sony Blu-ray player. Turn on the TV to which the Sony Blu-ray player is attached. Wait for the "No Disc" text to appear on the front of the Sony's LCD display and on the TV's screen.

Step 2
Press the "Eject" button on the remote control. Wait for the disc tray to eject itself from the front of the Sony Blu-ray player.

Step 3
Press the "Disc Info" button on the remote control. Look for a number to appear on one of the upper corners of the screen of the TV.

Step 4
Press the "Disc Info" button repeatedly until the number "9" appears on the TV's screen. This number indicates that the Sony Blu-ray player is now set for "multi-region" and will play any Blu-ray disc that is commercially made.

Step 5
Turn the Sony Blu-ray player off using the remote control. Turn the Sony Blu-ray player back on using the remote control. Press the "Eject" button on the remote control to close the disc tray. Turn the Sony Blu-ray player off using the remote control.