Tutorials ASP.NET Core MVC Tutorial
Creating Models — Complete Guide
Creating Models — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of ASP.NET Core MVC Tutorial on Toolliyo Academy.
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ASP.NET Core MVC Tutorial · Lesson 51 of 200
Creating Models
Getting Started ✓ → Core MVC ✓ → Data & Security → Production → Career
Intermediate · 5 — Database & Auth · ~6 min · Section 5: Models & Data Passing
What is this?
Creating Models shapes data for forms and validation before it reaches SQL Server.
Why should you care?
Bad input stopped early keeps ShopNest safe and your database clean.
See it live — copy this example
Create an MVC project (dotnet new mvc), add the code, and run dotnet run.
builder.Services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<ShopNestDbContext>()
.AddDefaultTokenProviders();
Run Example »
This lesson uses terminal or setup steps. Run commands on your computer — the live editor appears on coding lessons.
What happened?
- Study the example line by line.
- Each part connects to Creating Models.
- Edit one line, save, and run dotnet run to see what changes.
Try it yourself
- Add the rule or model from the example.
- Submit invalid data and confirm errors show.
- Submit valid data and confirm save works.
- Change text or labels in the example and run again — watch the browser update.
- Break the code on purpose (remove a semicolon), read the error message, then fix it.
Remember
You learned what Creating Models is and when to use it. Practice by changing the example yourself. Explain it in your own words before moving on.