Develop Reference

Finding Min and Max using LINQ

I am trying to create a LINQ query that allows the user to select Either Min Or Max from a drop down that I have on my web page. If the user selects Min it will display the record with the lowest Quote (Quote coming from a database table called rentals)
I have not had any luck with .Min() and .Max(). I am not sure how to go about this so any help would be appreciated.
This is my if statement for deciding what option the user has chosen on the drop down box:
namespace CarGarageSales.Pages.Queries
{
[BindProperties]
public class Query3Model : PageModel
{
private readonly CarGarageSales.Data.CarGarageSalesContext _context;
public IList<Rental> Rental { get; set; }
[BindProperty(SupportsGet = true)]
public int UserInput { get; set; }
public Query3Model(CarGarageSales.Data.CarGarageSalesContext context)
{
_context = context;
}
public async Task OnGetAsync()
{
if (UserInput == 0)
{
var Rentals = (from s in _context.Rentals
select s);
Rental = await Rentals.ToListAsync();
}
else if (UserInput == 1)
{
var Rentals = (from s in _context.Rentals
select s).Min();
}
else
{
var Rentals = (from s in _context.Rentals
select s.Quote).Max();
}
}
}
}
This is my HTML section:
#page
#model CarGarageSales.Pages.Queries.Query3Model
#{
ViewData["Title"] = "Query3";
}
<h2>Query3</h2>
<form>
<p>
Min or Max?:<select asp-for="UserInput">
<option></option>
<option>Min</option>
<option>Max</option>
</select>
<input type="submit" value="Search" />
</p>
</form>
<p class="Text">Here is the record for the Rentals you requested!</p>
<table class="table Text">
<thead>
<tr>
<th>
#Html.DisplayNameFor(model => model.Rental[0].RentalID)
</th>
<th>
#Html.DisplayNameFor(model => model.Rental[0].Price)
</th>
<th>
#Html.DisplayNameFor(model => model.Rental[0].Duration)
</th>
<th>
#Html.DisplayNameFor(model => model.Rental[0].Quote)
</th>
<th></th>
</tr>
</thead>
<tbody>
#foreach (var item in Model.Rental)
{
<tr>
<td>
#Html.DisplayFor(modelItem => item.RentalID)
</td>
<td>
#Html.DisplayFor(modelItem => item.Price)
</td>
<td>
#Html.DisplayFor(modelItem => item.Duration)
</td>
<td>
#Html.DisplayFor(modelItem => item.Quote)
</td>
</tr>
}
</tbody>
</table>
Rentals class:
namespace CarGarageSales.Models
{
[BindProperties]
public class Rental
{
[Required]
public int RentalID { get; set; }
[Required]
[Display(Name = "Price")]
[Range(100, 200000, ErrorMessage = "Price must be between 100 and 200,000 Pounds")]
public decimal Price { get; set; }
[Required]
[Display(Name = "Duration")]
[Range(1, 36,ErrorMessage = "Duration must be between 1 and 36 Months")]
public int Duration { get; set; }
[Required]
[Display(Name = "Quote")]
[Range(20, 10000, ErrorMessage = "Quote must be between 20 and 10000 Pounds")]
public decimal Quote { get; set; }
public Customer Customer { get; set; }
public virtual IList<Car> Cars { get; set; }
public virtual IList<SalesManRental> SalesManRental { get; set; }
}
}

Let's see an example below (Here is your live code)
using System;
using System.Linq;
public class Program
{
public static void Main()
{
var option = 1;
var list = new[]{ new Rental{ RentalID = 1, Quote = 1 }, new Rental{ RentalID = 2, Quote = 2 }, new Rental{ RentalID = 3, Quote = 3 }, new Rental{ RentalID = 4, Quote = 1 }, new Rental{ RentalID = 5, Quote = 3 } };
var minQuote = list.Min((p => p.Quote));
var maxQuote = list.Max((p => p.Quote));
var result = list.Where(p => (option == 1 && p.Quote == minQuote) || (option == 2 && p.Quote == maxQuote));
if(option == 0)
result = list;
foreach(var item in result)
Console.WriteLine(item.Quote);
}
public class Rental
{
public int RentalID { get; set; }
public decimal Price { get; set; }
public decimal Quote { get; set; }
}
}
Note: Change value of option in range 0, 1, 2 to test your case.

Not tested, but you could do something like this:
var filteredRentals = _context.Rentals.GroupBy(g => g.RentalID)
.Select(x => new Rental
{
RentalID = x.Key,
Quote = x.Max(z => z.Quote),
Duration = x.FirstOrDefault(r => r.RentalID == x.Key && r.Quote == x.Max(z => z.Quote)).Duration,
Price = x.FirstOrDefault(r => r.RentalID == x.Key && r.Quote == x.Max(z => z.Quote)).Price
}).ToList();
The idea is you group it by RentalID to get the Max/Min Quote, then get the first record that has those RentalID and Quote
In case they have same quote and you want to show all records instead of the first:
var groupedRentals = _context.Rentals.GroupBy(g => g.RentalID)
.Select(x => new
{
RentalID = x.Key,
Quote = x.Max(z => z.Quote)
}).ToList();
var filteredGroupedRentals = _context.Rentals.Where(r => groupedRentals.Any(g =>
g.RentalID == r.RentalID &&
g.Quote == r.Quote))
.ToList();

As others have mentioned, you'll need to use .Select(s => s.Quote).Min() (or .Max). However, your select list options don't have any values. You need to specify the appropriate values, such as:
<option value="0">All</option>
<option value="1">Min</option>
<option value="2">Max</option>

You last example within the else should work to return the max Quote, as long as you are sure have data in _context.Rentals. I am not sure why you are using Async Task but you are not awaiting anything within UserInput == 1 or the else, only UserInput == 0
This should work
var Rentals = (from s in _context.Rentals select s.Quote).Max();
Example (test it here https://dotnetfiddle.net/2SnPcS)
using System;
using System.Collections.Generic;
using System.Linq;
public class Program {
public class Rental
{
public int RentalID { get; set; }
public decimal Price { get; set; }
public int Duration { get; set; }
public decimal Quote { get; set; }
}
public static void Main()
{
// sample data
var rentals = new List<Rental> {
new Rental { RentalID = 1, Price = 100.00m, Duration = 2, Quote = 200.00m },
new Rental { RentalID = 2, Price = 100.00m, Duration = 2, Quote = 200.00m },
new Rental { RentalID = 3, Price = 100.00m, Duration = 1, Quote = 100.00m },
new Rental { RentalID = 4, Price = 100.00m, Duration = 1, Quote = 100.00m },
new Rental { RentalID = 5, Price = 100.00m, Duration = 5, Quote = 500.00m }
};
// get min quote
var minQuote = (from s in rentals select s.Quote).Min();
// get max quote
var maxQuote = (from s in rentals select s.Quote).Max();
Console.WriteLine(string.Format("min={0} max={1}", minQuote, maxQuote));
// Outputs: min=100.00 max=500.00
}
}
I am not sure what the rest of your application looks like or how it is being used, but yes you can call your methods anything you want. Do you want just the Quote decimal value, or the entire Rental associated with it? To change your OnGetAsync method based on what you showed us, getting the decimal value only, it would look something like this (you were almost there).
public decimal GetQuoteAmount()
{
// this could be min
if (UserInput == 0)
{
return (from s in _context.Rentals select s.Quote).Min();
}
// this could be max
else if (UserInput == 1)
{
return (from s in _context.Rentals select s.Quote).Max();
}
else
{
// is there a third option? What do you want to happen if they do not select Min or Max?
return 0;
}
}

I think part of the problem is that you only assign Rental in the case where UserInput == 0. Adding an assignment in the other cases should make your results update when the user changes their input.
Additionally, it sounds like you want to get the full records of all the objects with the largest (or smallest) Quote. If this is the case, then the OrderBy and GroupBy methods should help here because they allow you to sort the data based on it's properties, like the value of Quote, and group data with the same value together.
For example:
public async Task OnGetAsync()
{
if (UserInput == 0)
{
Rental = _context.Rentals().ToListAsync();
}
else if (UserInput == 1)
{
// Get the group of items with min quote
Rental = _context.Rentals()
.GroupBy(r => r.Quote) // Group items with the same quote (Quote becomes the Key)
.OrderBy(g => g.Key) // Order the groups by quote (smallest will be first)
.FirstOrDefault() // Choose the first group (those with min quote)
.ToListAsync(); // Select the items into a list
}
else
{
// Get the group of items with max quote
Rental = _context.Rentals()
.GroupBy(r => r.Quote) // Group items with the same quote (Quote becomes the Key)
.OrderBy(g => g.Key) // Order the groups by quote (smallest will be first)
.LastOrDefault() // Choose the last group (those with max quote)
.ToListAsync(); // Select the items into a list
}
}

Handling Multiple fields in mvc from SQL Table

Out of the 4 tables that I have, 3 contain similar(client,policyno,policytype..) fields but with different data. The other table, however, has very different fields(client,sex,telephone,dob..). I have a search box in my view that makes use of the telephone number to display related records from all the 3 tables. Unfortunately, I am not able to handle the fields of the fourth table. Keeps returning the error
System.IndexOutOfRangeException: 'PolicyNo'
My Model:
public class TableModels
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int ID { get; set; }
public string Client { get; set; }
public string PolicyNo { get; set; }
public short? PolicyType { get; set; }
public string Telephone { get; set; }
//Health
public DateTime? DOB { get; set; }
public string Sex { get; set; }
public string DepMemberNumber { get; set; }
protected TableModels ReadValue(SqlDataReader reader)
{
TableModels obj = new TableModels();
if (reader["ID"] != DBNull.Value)
{
obj.ID = (int)reader["ID"];
}
if (reader["Client"] != DBNull.Value)
{
obj.Client = (string)reader["Client"];
}
if (reader["PolicyNo"] != DBNull.Value)
{
obj.PolicyNo = (string)reader["PolicyNo"];
}
if (reader["PolicyType"] != DBNull.Value)
{
obj.PolicyType = (short)reader["PolicyType"];
}
The error is returned on the Protected TableModel class.
Any advice would be appreciated
View:
#model IEnumerable
#foreach (var item in Model.OrderByDescending(m => m.Client))
{
<tr>
<td>
#Html.DisplayFor(modelitem => item.Client)
</td>
<td>
#Html.DisplayFor(modelitem => item.Telephone)
</td>
<td>
#Html.ActionLink("Details", "Details", new { id = item.Telephone })
</td>
</tr>
}
Controller:
public ActionResult Details(string id)
{
using (MainContext db = new MainContext())
{
if (id == null)
{
return new HttpStatusCodeResult(System.Net.HttpStatusCode.BadRequest);
}
List<SingleView> x1 = db.SingleViews.Where(a => a.Telephone == id).ToList();
List<SingleViewM> x2 = db.SingleViewMs.Where(a => a.Telephone == id).ToList();
List<SingleViewWst> x3 = db.SingleViewWsts.Where(a => a.Telephone == id).ToList();
List<PensionsView> x4 = db.PensionsViews.Where(a => a.Telephone == id).ToList();
List<Health> x5 = db.Health.Where(a => a.Telephone == id).ToList();
SingleModel objview = new SingleModel();
objview.USSD = x1;
objview.Mombasa = x2;

Sum up columns in MVC C# Razor View

I am wondering if I can sum up decimal in all the columns that are dynamically generated in razor view without having to change this in controller and viewModel. I will be happy to try jQuery option as well.
ViewModel
public class LedgerViewModel
{
public LedgerViewModel(int PayCategoryCount)
{
PayCollection = new List<decimal>(new decimal[PayCategoryCount]);
}
public DateTime PDate { get; set; }
public class MonthlyPaymentsVM
{ public int PayCategoryId { get; set; }
[DisplayFormat(DataFormatString = "{0:MMMM yyyy}")]
public DateTime Date { get; set; }
public IEnumerable<string> PaymentCategories { get; set; }
public List<LedgerViewModel> Payments { get; set; }
public List<LedgerViewModel> Member { get; set; }
}
controller
public ActionResult Report(int year, int no, string nom, Guid gcode)
{
DateTime startdate = (new DateTime(DateTime.Now.Year - 1, 7, 1));
DateTime enddate = (new DateTime(DateTime.Now.Year, 7, 1));
DateTime date = DateTime.Now;
//get all payments
var a = from of in db.OfflinePayMents.Include(i => i.Customer).Include(i => i.PaymentCategory).ToList().Where(x => x.PDate >= startdate && x.PDate < enddate && x.POK && x.CustomerGuid=gcode) select new { of.Customer, of.PaymentCategory, of.CustomerID, of.PaymentCategoryID, of.PDate, of.TxnId, of.Pay, of.PType };
var grouped = a.GroupBy(x => new { customer = x.CustomerID, PaymentCategory = x.PaymentCategory.PaymentCategoryID, txn = x.TxnId, pd = x.PDate, x.PType }).Select(x => new
{
Name = x.First().Customer.Name,
Customer = x.First().Customer,
PaymentCategory = x.First().PaymentCategory,
Txn = x.First().TxnId,
Pd = x.First().PDate,
PType = x.First().PType,
cid = x.First().PaymentCategoryID,
Pay= x.Sum(y => y.Pay)
});
var data = grouped.GroupBy(x => x.Txn);
var PaymentCategories = db.PaymentCategories.OrderBy(z => z.Order);
var PayCategoryCount = PaymentCategories.Count();
var PaymentCategoryIDs = PaymentCategories.Select(x => x.PaymentCategoryID).ToList();
var model = new MonthlyPaymentsVM()
{
//Member = members,
Date = date,
PaymentCategories = PaymentCategories.Select(z => z.PaymentCategoryTitle),
Payments = new List<LedgerViewModel>()
};
foreach (var group in data)
{
LedgerViewModel payment = new LedgerViewModel(PaymentCategoryCount);
var pd = group.First().Pd;
payment.PDate = pd;
foreach (var item in group)
{
int index = PaymentCategoryIDs.IndexOf(item.PaymentCategory.PaymentCategoryID);
if (index < 0)
{
payment.PayCollection[index + 1] = item.Pay;
}
else
{
payment.PayCollection[index] = item.Pay;
}
payment.Total += item.Pay;
}
model.Payments.Add(payment);
}
return View(model);
}
Razor View
<table class="doubleborder" width="99%" border="0" align="center" cellpadding="0" cellspacing="0">
<thead>
<tr>
<th>Date</th>
#foreach (var payname in Model.PaymentCategories)
{
<th>#payname</th>
}
</tr>
</thead>
<tbody>
#foreach (var item in Model.Payments)
{
<tr>
<td>#item.PayDate.ToString("dd/MM/yyyy")</td>
#foreach (var amount in item.PayCollection)
{
<td>#amount.ToString("c")</td>
}
</tr>
}
<tr class="doubleborder">
<td>Total:</td>
#foreach (var item in Model.PaymentCategories)
{
<td>
looking at getting sum totals of each column here
</td>
}
</tr>
</tbody>
</table>
So this groups by customer. The payments are grouped by transaction Date and are iterated in the foreach loop in the view.
Thanks if you are able to help.

If I understand your model correctly, this is what you are looking for:
#Model.Payments.Sum(i => i.Paycollection.Sum(x => x.amount));
Update, based on your comment: (and assuming that all the columns have value for all the PaymentCollections)
#for(int i = 0 ; i < PaymentCategories.Count(); i++)
{
<td>
Model.Payments.Sum(x => x.PayCollection[i]); //this will throw an exception if the value at index is not defined
</td>
}

looping through dictionary inside dictionary in jquery

I'm trying to set values to table containing textboxes in each cell. For instance a table having a first column containing names, and rest of the columns containing textboxes to add marks of the given assignment for individual students. For that I used dictionary to hold given marks by the instructor and when the page is load, the marks are set to the relevant textboxes. however my iteration over Dictionary in jquery doesn't seem to be really working. I'm missing somewhere in loop. Below is my code.
public class StudentAssignments
{
public string Id { get; set; }
public Models.Assignment assignment { get; set; }
public Models.User user { get; set; }
public DateTime? SubmissionDate { get; set; }
public string Result { get; set; }
public Models.File assignmentfiles {get;set;}
}
public class Assignment
{
public string Id { get; set; }
public string batchid { get; set; }
public List<SelectListItem> batchnumber { get; set; }
public string Title { get; set; }
public string Description { get; set; }
[DataType(DataType.Date)]
public DateTime? DueDate { get; set; }
public Models.File file { get; set; }
}
public class File
{
public string strId { get; set; }
public string strName { get; set; }
public string strPath { get; set; }
public string strSize { get; set; }
}
InstructorController.cs
[HttpPost]
public ActionResult AssignedStudents(string id)
{
//Get Student Assignments
Models.StudentAssignments studentAssignment = new Models.StudentAssignments();
Context.Assignment contAssignment = new Context.Assignment();
CreateUser contUser = new CreateUser();
Dictionary<string, Dictionary<string, List<Models.StudentAssignments>>> dict =
new Dictionary<string, Dictionary<string, List<Models.StudentAssignments>>>();
var studentslist = contStudent.getAllStudentBatchList().Where(p => p.batchId == id).Select(p => p.studentId).ToList();
var assignmentid = contAssignment.lstAssignment().Where(p => p.batchid == id).Select(p=>p.Id).ToList();
foreach(var items in studentslist)
{
dict.Add(items.ToString(), new Dictionary<string, List<Models.StudentAssignments>>());
foreach (var item1 in assignmentid)
{
dict[items].Add(item1.ToString(), GetStudentFiles(items, item1));
}
}
ViewBag.StudentAssignment = dict;
}
private List<Models.StudentAssignments> GetStudentFiles(string stdid, string assgnid)
{
Context.Assignment contAssignment = new Context.Assignment();
CreateUser contuser = new CreateUser();
List<Models.StudentAssignments> lstassgn = new List<Models.StudentAssignments>();
var details = (from t1 in contAssignment.GetStudentAssignments()
join
t2 in contAssignment.GetStudentAssignmentsFiles() on
t1.Id equals t2.assignment.Id
join t3 in contuser.GetAllUsers() on t1.user.Id equals t3.Id
where t1.assignment.Id == assgnid && t1.user.Id == stdid
select new { t1,t2,t3 }).ToList();
foreach (var item in details)
{
Models.StudentAssignments assignment = new Models.StudentAssignments();
assignment.assignment = new Models.Assignment();
assignment.Id = item.t1.Id;
assignment.Result = item.t1.Result;
assignment.assignmentfiles = new Models.File();
assignment.assignmentfiles.strId = item.t2.Id;
assignment.assignmentfiles.strPath = item.t2.assignmentfiles.strPath;
assignment.user = new Models.User();
assignment.user.Id = item.t3.Id;
assignment.user.FirstName = item.t3.FirstName;
assignment.user.LastName = item.t3.LastName;
lstassgn.Add(assignment);
}
return lstassgn;
}
AssignedStudents.cshtml
<div class="col-md-12">
<h2>Submitted Assignments</h2>
<table class="table table-bordered table-responsive table-hover" id="tbl">
<tr>
<th>
Name
</th>
<th>
Assignment 1
</th>
</tr>
#foreach (var item in ViewBag.StudentAssignment)
{
bool flag = true;
<tr class="item">
#foreach (var item1 in item.Value)
{
foreach (var item2 in item1.Value)
{
if (flag == true)
{
<td>
#item2.user.FirstName
</td>
flag = false;
}
break;
}
<td>
#foreach (var item2 in item1.Value)
{
<img src="#" />
}
#foreach (var item2 in item1.Value)
{
if (item2.Result != null && item2.Result != "Pending")
{
<div><input type="text" value="#item2.Result" class="txtbox" id=#Guid.NewGuid().ToString() disabled="disabled"/></div>
}
else
{
<div><input type="text" class="txtbox" id=#Guid.NewGuid().ToString() /></div>
}
<input type="hidden" id="stdassgnid" value="#item2.Id" />
break;
}
</td>
}
</tr>
}
</table>
<input type="button" id="saveResult" value="Save Result" class="btn btn-success" />
</div>
Edited:-
Since I've managed to pass the results in the required textboxes. I'm here surrounded by another issue which is the next assignment submission. The first column contains the submitted marks already, and this time instructor would carry out the marking of the next assignment. Therefore, The system would look for the next column as the previous column already contains marks.
$("#saveResult").click(function () {
$("#tbl tr.item").each(function () {
$(this).find("input.txtbox").attr("disabled", "disabled");
var Mkrs = $(this).find("input.txtbox").val();
var Id = $(this).find("#stdassgnid").val();
alert(Mkrs)
$.ajax({
type: "POST",
url: '#Url.Action("UpdateResult", "Assignment")',
data: { Marks: Mkrs, studentAssgnId: Id},
dataType: "json",
success: function (data) {
if(data.message!=null)
{
alert(data.message)
}
}
})
});

grouping and displaying models in a view

I am having trouble with grouping a list, and then building a model that represents that list and displaying the results in a table within a view. For example:
List of items ordered
Date
CustomerId
Location
Item
Price
Quantity
How would I correctly model and display that list in a table if I wanted to group the list by location? And what if I wanted to group the list by two properties, for example, Location and CustomerId?
Here is my model:
public class ViewInvoice
{
public string ClientLocation { get; set; }
public List<DetailsGroup> Details { get; set; }
public class DetailsGroup
{
public List<string> Product { get; set; }
public List<string> ProductSize { get; set; }
public List<string> PackageType { get; set; }
public List<DateTime> OrderDate { get; set; }
public List<DateTime> DeliveryDate { get; set; }
public List<int> OrderNumber { get; set; }
public List<decimal> Price { get; set; }
public List<int> ItemQuantity { get; set; }
}
}
I am trying to display this model in a table within my razor view. Here is that code:
#using MyModel.MyTools.Orders.SumOrder
#model SumOrder
#{
ViewBag.Title = "View Invoice";
}
<h2>View Invoice</h2>
<table>
#foreach(var prod in Model.OCI)
{
<tr>
<td>
#prod.ClientLocation
</td>
</tr>
foreach (var orderItem in prod.Details)
{
<tr>
<td>
#orderItem.Product
</td>
<td>
#orderItem.ItemQuantity
</td>
</tr>
}
}
</table>
The first row in the table displays correctly, which is the name of a city, but in the next row I get this:
System.Collections.Generic.List1[System.String] System.Collections.Generic.List1[System.Int32]
Can someone explain to me why I can not get the list returned in a readable format, and how to correct this problem?
Here is the code I used to group the list for the ViewInvoice model:
public SumOrder(List<orders_Cart> order)
{
// create list of order cart item
List<OrderCartItems> cartItems = new List<OrderCartItems>();
// convert orders to ocm
foreach(var item in order)
{
var newCartItem = new OrderCartItems();
try
{
newCartItem.Product = db.product_Product.FirstOrDefault(p =>
p.Id == item.ProductId).ProductDescription ?? "none";
}
catch (Exception)
{
newCartItem.Product = "none";
}
try
{
newCartItem.ClientForProduct = MyTool.OrdersFindClientLocation(
(int) item.ClientForOrdersId);
}
catch (Exception)
{
newCartItem.ClientForProduct = new object[3];
}
try
{
newCartItem.ProductSize = db.products_Size.FirstOrDefault(p => p.Id ==
item.ProductSizeId).ProductSizeCode ?? "none";
}
catch (Exception)
{
newCartItem.ProductSize = "none";
}
try
{
newCartItem.PackageType = db.packaging_PackageType.FirstOrDefault(p =>
p.Id == item.PackageTypeId).PackageTypeCode ?? "none";
}
catch (Exception)
{
newCartItem.PackageType = "none";
}
newCartItem.OrderDate = (DateTime) item.OrderDate;
newCartItem.DeliveryDate = (DateTime) item.DeliveryDate;
newCartItem.OrderNumber = (int) item.OrderNumber;
newCartItem.Price = (decimal) item.Price;
newCartItem.ClientLocation = MyTool.OrdersFindClientLocation(
(int) item.ClientForOrdersId, null);
newCartItem.ItemQuantity = (int) item.Quantity;
cartItems.Add(newCartItem);
}
// group the cartItems according to location
List<ViewInvoice> ordersGrouped = cartItems.GroupBy(c => new
{c.ClientLocation})
.OrderBy(c => c.Key.ClientLocation).Select(s =>
new ViewInvoice()
{
ClientLocation = s.Key.ClientLocation,
Details = new List<ViewInvoice.DetailsGroup>()
{
new ViewInvoice.DetailsGroup()
{
Product = s.Select(p => p.Product).ToList(),
ItemQuantity = s.Select(p => p.ItemQuantity).ToList(),
DeliveryDate = s.Select(p => p.DeliveryDate).ToList(),
OrderDate = s.Select(p => p.OrderDate).ToList(),
OrderNumber = s.Select(p => p.OrderNumber).ToList(),
PackageType = s.Select(p => p.PackageType).ToList(),
Price = s.Select(p => p.Price).ToList(),
ProductSize = s.Select(p => p.ProductSize).ToList()
}
}
}).ToList();
// set the OCI property
OCI = ordersGrouped;
};

Ok, I finally solved my problem. I initially over-thought the problem. I simplified my model, and added some simple logic to my view.
Here is the updated Model:
public class ViewInvoice
{
public string ClientLocation { get; set; }
public List<string> Product { get; set; }
public List<string> ProductSize { get; set; }
public List<string> PackageType { get; set; }
public List<DateTime> OrderDate { get; set; }
public List<DateTime> DeliveryDate { get; set; }
public List<int> OrderNumber { get; set; }
public List<decimal> Price { get; set; }
public List<int> ItemQuantity { get; set; }
}
the updated code used to group the list for the Model:
// group the cartItems according to location
List<ViewInvoice> ordersGrouped = cartItems.GroupBy(c => new
{c.ClientLocation})
.OrderBy(c => c.Key.ClientLocation).Select(s =>
new ViewInvoice()
{
ClientLocation = s.Key.ClientLocation,
Product = s.Select(p => p.Product).ToList(),
ItemQuantity = s.Select(p => p.ItemQuantity).ToList(),
DeliveryDate = s.Select(p => p.DeliveryDate).ToList(),
OrderDate = s.Select(p => p.OrderDate).ToList(),
OrderNumber = s.Select(p => p.OrderNumber).ToList(),
PackageType = s.Select(p => p.PackageType).ToList(),
Price = s.Select(p => p.Price).ToList(),
ProductSize = s.Select(p => p.ProductSize).ToList()
}).ToList();
and the updated view:
#using MyModel.MyTools.Orders.SumOrder
#model SumOrder
#{
ViewBag.Title = "View Invoice";
}
<h2>View Invoice</h2>
#{
int i = 0;
}
<table>
#foreach(var mod in Model.OCI)
{
var modCount = #mod.Product.Count();
<tr>
<th>#mod.ClientLocation</th>
</tr>
<tr>
<th>Product</th>
<th>Price</th>
</tr>
foreach (var items in mod.Product)
{
<tr>
<td>
#mod.Product.ElementAtOrDefault(i)
</td>
<td>
#mod.Price.ElementAtOrDefault(i)
</td>
</tr>
i++;
}
}
</table>
This solution clearly allows me to iterate through the model reproducing any required rows or cells along the way. Played Russian roulette for two days over this problem. Hope this saves some others some time.