Creating Forms dynamically based on database configuration

I need a system where we can create dynamic forms based on the configuration from the database. So a user can select what type of fields he/she wants in her screen and then it will be shown. t should support all type of HTML input fields like text box, list box, combo box, tables/grid etc. I also need the CRUD operation to be enabled for these fields and need to be tracked for all the changes and read. For these fileds there should be an option to validate if it numeric or string etc. If you have built a similar system or have idea how to do it let me know. Prefer using HTML/JQuery, AJAX and WCF for web servies