即使发送了请求，ASP.NET MVC表单数据也不会保存到数据库中。

public class MyModel
{
    public string Name { get; set; }
    public int Age { get; set; }
}

@model MyModel

<form action="/Home/Submit" method="post">
    <input type="text" name="Name" />
    <input type="number" name="Age" />
    <input type="submit" value="Submit" />
</form>

public class HomeController : Controller
{
    private readonly ApplicationDbContext _context;

    public HomeController(ApplicationDbContext context)
    {
        _context = context;
    }

    [HttpPost]
    public IActionResult Submit(MyModel model)
    {
        if (ModelState.IsValid)
        {
            // 假设有一个实体类对应数据库表
            var entity = new MyEntity { Name = model.Name, Age = model.Age };
            _context.MyEntities.Add(entity);
            _context.SaveChanges();
            return RedirectToAction("Success");
        }
        return View(model);
    }
}

public class ApplicationDbContext : DbContext
{
    public DbSet<MyEntity> MyEntities { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer("YourConnectionStringHere");
    }
}

dotnet ef migrations add InitialCreate
dotnet ef database update

try
{
    _context.SaveChanges();
}
catch (Exception ex)
{
    // 记录异常信息
    Console.WriteLine(ex.Message);
    ModelState.AddModelError(string.Empty, "An error occurred while saving the data.");
}

public class MyModel
{
    [Required]
    public string Name { get; set; }

    [Range(0, 120)]
    public int Age { get; set; }
}

@if (ViewData.ModelState.TryGetValue("Name", out ModelStateEntry entry))
{
    if (entry.Errors.Count > 0)
    {
        <span>@entry.Errors[0].ErrorMessage</span>
    }
}