Run Time form Creation

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C#

ASP.NET

SQL-Server

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Hi,

I am wroking on the project with following need.

Step 1: The admin(non technical user) can design the form runtime and add asp.net user controls eg textboxes, drop-down list, radio buttons etc either by drag and drop or by any button click event. Lets say the admin designed a form for the tax office with following details:-

Textbox for name, email and address
radiobutton for self employee or employee
checkbox for newsletter. -------This step is fine i can add the controls runtime

Step 2: Once the form is designed the admin can save the from and let other end users to fill that. ---- but how to save the from to let the end user use that?
Step 3: The data must be saved into the database. ---- how to go ahead with the database, because i dont know what the user will chose..based on my research EAV model is somewhat i can use. However, i read a few drawbacks of that as well.

any help will be highly appreciated.

Kind regards
NerdAnalysis