User753101303 posted
Hi,
A forum is not well suited for learning from zero. As you seem to be brand new to ASP.NET and maybe C# I would suggest to give a try at
https://docs.microsoft.com/en-us/aspnet/core/razor-pages/?view=aspnetcore-5.0&tabs=visual-studio
Rather than saving the posted form field to a db you could use its value to compute an output value that you'll show then on the same page.
One could show something but in general you'll need to study turorials on your own. if blocked then ask for a particular point in a forum but you won't be able to learn everything from a forum.
A first objective could be to enter a name for example and than appending the "z" letter. Then you can trasnform that to use an integer value and then use this value to output the result of your formula.
Edit:
- you have ASP.NET 4. x which the latest versiion ever of 20 year old framework. Unless you need to learn that to maintain existing apps, I would suggest to skip that
- ASP.NET 3.1 or 5.0 is a cross platform rewrite and likely what yoi should learn if you are just starting