my list variable array missing after click button - asp.net-mvc

Question

I don't have DB, instead DB I have to list array, I have a table, and when I want Edit details of Driver, I click 'edit', after that display change to page with details, after that I can change details and click save button, my problem that after clicking button 'save', my array list miss, I not very good in MVC, but I try my best! if somebody sees what I do wrong, please tell me and explain, thank you
that my controller
public class DriverTaxiController : Controller
{
static List<Drivers> Driver = new List<Drivers>();
public static int numLine = -1;
// GET: DriverTaxi
public ActionResult List()
{
Driver.Add(new Drivers() { Line = 1, NumberLicens = "123456", FirstName = "Evgeny", LastName = "Ryvkin", PhoneNumber = "0546819725", StartWork = "12/10/17", DateCheckEyes = "13/10/17"});
Driver.Add(new Drivers() { Line = 2, NumberLicens = "123457", FirstName = "Moshe", LastName = "Kohen", PhoneNumber = "0546819725", StartWork = "12/10/17", DateCheckEyes = "13/10/17" });
Driver.Add(new Drivers() { Line = 3, NumberLicens = "123458", FirstName = "Dana", LastName = "Multy", PhoneNumber = "0546819725", StartWork = "12/10/17", DateCheckEyes = "13/10/17" });
ViewBag.Drivers = Driver;
return View();
}
public ActionResult MyAction(int id=0)
{
for(int i = 0; i < Driver.Count; i++)
{
if(Driver[i].Line == id)
{
ViewBag.nl = Driver[i].NumberLicens;
ViewBag.fn = Driver[i].FirstName;
ViewBag.ln = Driver[i].LastName;
ViewBag.phone = Driver[i].PhoneNumber;
ViewBag.start = Driver[i].StartWork;
ViewBag.eye = Driver[i].DateCheckEyes;
ViewBag.line = Driver[i].Line;
}
}
numLine = id;
return View();
}
[HttpPost]
public ActionResult Update()
{
if (ModelState.IsValid)
{
numLine--;
Driver[numLine].NumberLicens = Request.Form["NumberLicens"];
Driver[numLine].FirstName = Request.Form["FirstName"];
Driver[numLine].LastName = Request.Form["LastName"];
Driver[numLine].PhoneNumber = Request.Form["PhoneNumber"];
Driver[numLine].StartWork = Request.Form["StartWork"];
Driver[numLine].DateCheckEyes = Request.Form["DateCheckEyes"];
return View("List2");
}
else
{
return View("MyAction");
}
}
that my View Edit, when I click the button, my parameters not saved in my list, I don't understand why
#using (Html.BeginForm("Update", "DriverTaxi"))
{
#Html.TextBoxFor(Model => Model.NumberLicens, new { #Value = #ViewBag.nl }) #Html.ValidationMessageFor(x => x.NumberLicens)
<br />
#Html.TextBoxFor(Model => Model.FirstName, new { #Value = #ViewBag.fn })
<br />
#Html.TextBoxFor(Model => Model.LastName, new { #Value = #ViewBag.ln })
<br />
#Html.TextBoxFor(Model => Model.PhoneNumber, new { #Value = #ViewBag.phone })
<br />
#Html.TextBoxFor(Model => Model.StartWork, new { #Value = #ViewBag.start })
<br />
#Html.TextBoxFor(Model => Model.DateCheckEyes, new { #Value = #ViewBag.eye })
<br />
#Html.HiddenFor(Model => Model.Line)
<input type="submit" value="Save" />
#Html.ValidationSummary()
}
that my Table
<table class="table table-bordered table-responsive table-hover">
<tr>
<th>No.</th>
<th>Number Licens</th>
<th>Full Name</th>
<th>Phone Number</th>
<th>Start Work</th>
<th>Date Cheking the Eyes</th>
<th>Address</th>
<th>Email</th>
<th>Edit</th>
<th>Delete</th>
</tr>
#foreach (Drivers p in ViewBag.Drivers)
{
<tr>
<td>#p.Line</td>
<td>#p.NumberLicens</td>
<td>#p.FirstName #p.LastName </td>
<td>#p.PhoneNumber</td>
<td>#p.StartWork</td>
<td>#p.DateCheckEyes</td>
<td>
#Html.ActionLink("Edit", "MyAction", "DriverTaxi", new { id = p.Line }, null)
</td>
<td>addres</td>
<td>email</td>
<td><input id="Button2" type="submit" value="Delete" name="#p.NumberLicens" /></td>
</tr>
}`enter code here`
and that my error
enter image description here

Answer 1

Just add your ViewBag assignment to each of your actions that render view. Something like this:
public ActionResult MyAction(int id=0)
{
for(int i = 0; i < Driver.Count; i++)
{
if(Driver[i].Line == id)
{
ViewBag.nl = Driver[i].NumberLicens;
ViewBag.fn = Driver[i].FirstName;
ViewBag.ln = Driver[i].LastName;
ViewBag.phone = Driver[i].PhoneNumber;
ViewBag.start = Driver[i].StartWork;
ViewBag.eye = Driver[i].DateCheckEyes;
ViewBag.line = Driver[i].Line;
}
}
numLine = id;
ViewBag.Drivers = Driver; //TODO
return View();
}
[HttpPost]
public ActionResult Update()
{
if (ModelState.IsValid)
{
numLine--;
Driver[numLine].NumberLicens = Request.Form["NumberLicens"];
Driver[numLine].FirstName = Request.Form["FirstName"];
Driver[numLine].LastName = Request.Form["LastName"];
Driver[numLine].PhoneNumber = Request.Form["PhoneNumber"];
Driver[numLine].StartWork = Request.Form["StartWork"];
Driver[numLine].DateCheckEyes = Request.Form["DateCheckEyes"];
ViewBag.Drivers = Driver; //TODO
return View("List2");
}
else
{
ViewBag.Drivers = Driver; //TODO
return View("MyAction");
}
}