How to update value progress bar bootstrap from controller in ASP .NET Core - asp.net-core-mvc

Question

I have a table that receive email of my users for newsletter .I Show it on my dashboard with count .but now I want to show on progress bar and its percentage per last month
how do I do ? I create another view model for show count of some things
I can show count of them but I need show on progress bar too.
my viewmodel:
public class NewsLetterViewModel
{
public string Phone { get; set; }
public string Email { get; set; }
public DateTime CreateDate { get; set; }
}

Answer 1

You can try to use ViewBag to pass count and percentage.Here is a demo:
Action:
public IActionResult News()
{
ViewBag.Count = 0;
ViewBag.Percentage = 0;
return View();
}
[HttpPost]
public IActionResult News(NewsLetterViewModel n,int Count)
{
//you can pass the count and percentage with ViewBag here
ViewBag.Count= Count+ 1;
ViewBag.Percentage=25;
return View();
}
View:
<div>
Count:#ViewBag.Count
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" style="width: #ViewBag.Percentage%;" aria-valuenow="#ViewBag.Percentage" aria-valuemin="0" aria-valuemax="100">#ViewBag.Percentage%</div>
</div>
<form method="post">
<input hidden name="Count" value="#ViewBag.Count" />
<div class="form-group">
<label asp-for="Phone" class="control-label"></label>
<input asp-for="Phone" class="form-control" />
<span asp-validation-for="Phone" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Email" class="control-label"></label>
<input asp-for="Email" class="form-control" />
<span asp-validation-for="Email" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="CreateDate" class="control-label"></label>
<input asp-for="CreateDate" class="form-control" />
<span asp-validation-for="CreateDate" class="text-danger"></span>
</div>
<input type="submit"value="submit" />
</form>
result: