Use of ViewMode in MVC

View model is a class that represents the data model used in a specific view. We could use this class as a model for a login page:

public class LoginPageVM
{
[Required(ErrorMessage = "Are you really trying to login without entering username?")]
[DisplayName("Username/e-mail")]
public string UserName { get; set; }
[Required(ErrorMessage = "Please enter password:)")]
[DisplayName("Password")]
public string Password { get; set; }
[DisplayName("Stay logged in when browser is closed")]
public bool RememberMe { get; set; }
}
Using this view model you can define the view (Razor view engine):

@model CamelTrap.Models.ViewModels.LoginPageVM

@using (Html.BeginForm()) {
@Html.EditorFor(m => m);
<input type="submit" value="Save" class="submit" />
}
And actions:

[HttpGet]
public ActionResult LoginPage()
{
return View();
}

[HttpPost]
public ActionResult LoginPage(LoginPageVM model)
{
...code to login user to application...
return View(model);
}