Nested Query MVC LINQ

Question

I\'m new to MVC and LINQ. Currently I faced difficulty on the project and decide to posted up.

My MVC-View that I

Answer 1

ViewBag is a dynamic property you can insert ViewBag anything but when you retrieve data from ViewBag, first need to convert it.

@foreach (var item in (List<PS>)ViewBag.services){
    <h3 class="page-header">
        @item
    </h3>

    //Table TAG INSERT Here: ID, Offer, Service
}

Answer 2

You can use a .GroupBy() clause to group your data by Service. Start by creating view models to represent what you want to display in the view

public class OfferVM
{
    public int ID { get; set; }
    [DisplayFormat(DataFormatString = "{0:P0}")]
    public float Offer { get; set; } // assumes you store this as float in the db
}
public class ServiceVM
{
    public string Name { get; set; }
    public IEnumerable<OfferVM> Offers { get; set; }
}

Then in the controller

IEnumerable<ServiceVM> model = db.PS.GroupBy(x => x.Service).Select(x => new ServiceVM()
{
    Name = x.Key,
    Offers = x.Select(y => new OfferVM()
    {
        ID = y.ID,
        Offer = y.Offer
    })
});
return View(model);

And in the view

@model IEnumerable<ServiceVM>
@foreach (var service in Model)
{
    <h2>@service.Name</h2>
    foreach (var item in service.Offers)
    {
        <span>@item.ID</span>
        <span>@Html.DisplayFor(m => item.Offer)</span>
    }
}