How do you get and set the value in TextBox using MVC?

In MVC, we use View Model to bind the values to the view like I am using Razor view engine syntax below:-

@Html.TextBoxFor(m=>m.ValueForTextBox) //Binded the value to the textbox model and passed
@Html.ValidationFor(m=>m.ValueForTextBox) //If any validation is applied

//On the Server side:-
public ActionResult GetValueForTextBox()
{
    var viewModel = new ValueForTextBoxViewModel
     {
         ValueForTextbox = "Fetch and assign the value here"      
     }
    return View(viewModel);
}

//ViewModel goes below:
public class ValueForTextBoxViewModel
{
    [Required("Required Field")] //Validation Message
    public string ValueForTextbox {get; set;}
}

Hope this helps anyway
Thanks
:)