Create excel file in asp.net

Question

I am working on a asp.net project(using language c#).

In which I want to open a blank excel file in front of user at run time,So that user can create Column according to his requirement..after creating column he can also able to fill data in that excel file..

Na Finally on the click of save button(which will be on that .aspx page only) that excel file should be save on the hard disk...

Please tell me if any other solution for this type of requirement...so that user can feal compatible just like he use Microsoft Excel sheet..

Any solution to this is highly appreciable..

Thanks In Advance