How to get view any file functionality as we get in gmail using asp.net

I have to create code to view any type of file in the browser as we are able to view in gmail.

Even though the user does not have the required software installed he should be able to view it.

The 开发者_运维问答file should not be open in separate window.

The file should be opened in the browser itself

Thanks in advance

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You'll need to process it on the server-side into some data structure that can be rendered in html/css/js on the client