ASP.NET Core MVC Mastery

Introduction to ASP.NET Core MVC Microsoft Web Stack Overview Evolution of ASP.NET Environment Setup Layouts & Partial Views in Razor Core Concepts Project Structure Startup Flow Middleware Pipeline Creating Project CLI Commands wwwroot & Static Files MVC Architecture Dependency Injection (DI) Service Lifetimes ViewData vs ViewBag TempData ViewModel Pattern Conventional vs Attribute Routing Custom Constraints Razor View Engine Layouts & Sections View Components ViewResult JsonResult RedirectResult Form Helpers Custom HTML Helpers Built-in Tag Helpers Custom Tag Helpers FromQuery vs FromRoute Complex Binding Data Annotations Remote Validation Fluent Validation Cookies & Sessions TempData Action Filters Authorize Filters Anti-forgery DbContext Migrations LINQ Relationships Repository Pattern Unit of Work Clean Architecture File Upload/Download PDF/Excel Generation Request Lifecycle Bundling & Minification Deployment Caching Strategies Async Programming Secure Coding Razor Pages vs MVC E-Commerce Web Application Employee Management System

public class RegisterViewModel {
    [Required(ErrorMessage = "Full Name is mandatory.")]
    [StringLength(100, MinimumLength = 3)]
    public string FullName { get; set; }

    [EmailAddress]
    [Required]
    public string Email { get; set; }

    [Range(18, 99)]
    public int Age { get; set; }
}
                

public class PastDateAttribute : ValidationAttribute {
    protected override ValidationResult IsValid(object value, ValidationContext context) {
        if (value is DateTime dt && dt >= DateTime.Now) {
            return new ValidationResult("Date must be in the past!");
        }
        return ValidationResult.Success;
    }
}