I would like to print products in order of quantity.The product with a bigger total should be first.
What am I missing here as it's NOT printing in order or total
class Program
{
static void Main()
{
var products=new List<Product>
{
new Product {Name = "Apple", Total = 5},
new Product {Name = "Pear", Total = 10}
};
var productsByGreatestQuantity = products.OrderBy(x => x.Total);
foreach (var product in productsByGreatestQuantity)
{
System.Console.WriteLine(product.Name);
}
System.Console.Read();
}
}
public class Product
{
public string Name { get; set; }
public int Total { get; set; }
}
var data = products.OrderByDescending(x => x.Total);
Change:
var productsByGreatestQuantity = products.OrderBy(x => x.Total);
to:
var productsByGreatestQuantity = products.OrderByDescending(x => x.Total);
Related
I have list of OrderInfo which contains Id of Product.
I'd want to load all Orders (that has List<Many2Many> inside)
which has at least one Product with Id from my OrderInfo list
Basically it is nested Any Any
The code that I wrote below as proof of concept works fine, but the problem is that when I try to do the same on EF Core then it is being evaluated on client side.
How can I make it to evaluate properly?
var list_of_details = new List<OrderInfo> {...};
context
.Orders
.Where(o => o.OrdersProducts.Any(p => list_of_details.Any(d => d.ProductId == p.ProductId)));
public class OrderInfo
{
public Guid ProductId { get; set; }
(...)
}
public class Order
{
public List<Many2Many> OrdersProducts = new List<Many2Many>();
(...)
}
public class Product
{
public List<Many2Many> OrdersProducts = new List<Many2Many>();
(...)
}
public class Many2Many
{
public Order Order { get; set; }
public Guid OrderId { get; set; }
public Product Product { get; set; }
public Guid ProductId { get; set; }
}
Here's example in non-ef way, but ugly and just as proof of concept
using System;
using System.Collections.Generic;
using System.Linq;
public class Program
{
public class OrderInfo
{
public int ProductId { get; set; }
}
public class Order
{
public int Id;
public List<Many2Many> OrdersProducts = new List<Many2Many>();
}
public class Product
{
public int Id;
public List<Many2Many> OrdersProducts = new List<Many2Many>();
}
public class Many2Many
{
public Order Order { get; set; }
public int OrderId { get; set; }
public Product Product { get; set; }
public int ProductId { get; set; }
}
public static void Main()
{
Console.WriteLine("List of ids that have to be in 'Order' in order to qualify him");
var list_of_details = Enumerable.Range(0, 5).Select(x => new OrderInfo(){ ProductId = x}).ToList();
foreach (var item in list_of_details)
{
Console.Write(item.ProductId);
}
Console.WriteLine();
// setup
var orders = new List<Order>();
var order = new Order(){Id = 2};
var product = new Product()
{
Id = 3,
};
order.OrdersProducts.Add(new Many2Many()
{
Order = order,
OrderId = order.Id,
Product = product,
ProductId = product.Id
});
var order2 = new Order(){Id = 3};
var product2 = new Product()
{
Id = 4,
};
order2.OrdersProducts.Add(new Many2Many()
{
Order = order2,
OrderId = order2.Id,
Product = product2,
ProductId = product2.Id
});
var order3 = new Order(){Id = 1};
var product3 = new Product()
{
Id = 5,
};
order3.OrdersProducts.Add(new Many2Many()
{
Order = order3,
OrderId = order3.Id,
Product = product3,
ProductId = product3.Id
});
orders.Add(order);
orders.Add(order2);
orders.Add(order3);
Console.WriteLine();
// end setup
foreach (var ord in orders)
{
Console.WriteLine();
Console.WriteLine($"Order Id: {ord.Id}");
Console.Write('\t' + "Product Ids: ");
foreach (var prod in ord.OrdersProducts)
{
Console.Write(prod.ProductId);
}
}
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("found orders");
foreach (var item in orders.Where(o => o.OrdersProducts.Any(p => list_of_details.Any(d => d.ProductId == p.ProductId))))
{
Console.WriteLine(item.Id);
}
}
}
Output:
List of ids that have to be in 'Order' in order to qualify him
01234
Order Id: 2
Products Ids: 3
Order Id: 3
Products Ids: 4
Order Id: 1
Products Ids: 5
found orders
2
3
One method is to reduce the list to just the ids,
var list_of_details = new List<OrderInfo> {...};
var orderInfoIds = list_of_details.Select(d => d.ProductId);
context
.Orders
.Where(o => o.OrdersProducts.Any(p => orderInfoIds.Contains(p.ProductId)));
I'm trying to convert a group a complex list in C# (with Linq)
public class classA
{
public string Name { get; set; }
public int id { get; set; }
public string phone { get; set; }
public string interest { get; set; }
}
My first class is classA where it contains many list of elements like below.
List<classA> obj = new List<classA>();
obj.Add(new classA { id = 1, Name = "a", phone = "321", interest = "Playing" });
obj.Add(new classA { id = 1, Name = "2", phone = "123", interest="Tv" });
From this I need to group by using the id, So I've used Linq
var item = obj.GroupBy(a => a.id).Select(ac => ac.ToList()).ToList();
I've another class called classB which hold's the values others than id from the classA (where it'd be hold all subset of different attributes)
public class classB
{
public string Name { get; set; }
public string phone { get; set; }
public string interest { get; set; }
}
My Final Class looks likes,
public class Final
{
public int id { get; set; }
public List<classB> details { get; set; }
public Final()
{
details = new List<classB>();
}
}
My requirements are, after grouping the classA based on id, I need to convert that into my final class.
So I did like below,
public static void Main()
{
Console.WriteLine("Hello World");
List<classA> obj = new List<classA>();
obj.Add(new classA { id = 1, Name = "a", phone = "321", interest = "Playing" });
obj.Add(new classA { id = 1, Name = "b", phone = "123", interest = "Tv" });
obj.Add(new classA { id = 2, Name = "c", phone = "12322", interest = "Tv" });
obj.Add(new classA { id = 3, Name = "d", phone = "12333", interest = "Tv" });
var item = obj.GroupBy(a => a.id).Select(ac => ac.ToList()).ToList();
List<Final> finalobjList = new List<Final>();
foreach (var report in item)
{
Final finalObj = new Final();
foreach (var result in report)
{
finalObj.id = result.id;
}
var data = report.Select(x => new classB { Name = x.Name, phone = x.phone, interest = x.interest }).ToList();
finalObj.details = data;
finalobjList.Add(finalObj);
}
Console.WriteLine(finalobjList.Count());
}
I believe there is another easy way to achieve this using linq without using foreach multiple times
Appreciate your help!
You should be able to use your existing code except when you do your Select, select a new Final and use the group's Key for the Id, and convert the ac.ToList to a list of ClassB for the Details:
var item = obj
.GroupBy(a => a.id)
.Select(ac =>
new Final
{
Id = ac.Key,
Details = ac.Select(a =>
new classB {interest = a.interest, phone = a.phone, Name = a.Name})
.ToList()
});
var finalobjList = obj.GroupBy(a => a.id).Select(x => new Final() { id = x.Key, details = x.Select(y => new classB() { Name = y.Name }).ToList() } ).ToList();
(Code only answer - please dont hate me)
var items = (from a in obj
group new classB {Name = a.Name, phone = a.phone, interest = a.interest} by a.id into aa
select new Final { id = aa.Key, B= aa.ToList()}).ToList();
I have the below two classes:
public class FirstInner
{
public int Id { get; set; }
public string Type { get; set; }
public string RoleId { get; set; }
}
public class SecondInner
{
public int Id { get; set; }
public string Type { get; set; }
}
Again, there are lists of those types inside the below two classes:
public class FirstOuter
{
public int Id { get; set; }
public string Name { get; set; }
public string Title { get; set; }
public List<FirstInner> Inners { get; set; }
}
public class SecondOuter
{
public int Id { get; set; }
public string Name { get; set; }
public List<SecondInner> Inners { get; set; }
}
Now, I have list of FirstOuter and SecondOuter. I need to check if FirstOuter list is a subset of SecondOuter list.
Please note:
The names of the classes cannot be changed as they are from different systems.
Some additional properties are present in FirstOuter but not in SecondOuter. When comparing subset, we can ignore their presence in SecondOuter.
No.2 is true for FirstInner and SecondInner as well.
List items can be in any order---FirstOuterList[1] could be found in SecondOuterList[3], based on Id, but inside that again need to compare that FirstOuterList[1].FirstInner[3], could be found in SecondOuterList[3].SecondInner[2], based on Id.
I tried Intersect, but that is failing as the property names are mismatching. Another solution I have is doing the crude for each iteration, which I want to avoid.
Should I convert the SecondOuter list to FirstOuter list, ignoring the additional properties?
Basically, here is a test data:
var firstInnerList = new List<FirstInner>();
firstInnerList.Add(new FirstInner
{
Id = 1,
Type = "xx",
RoleId = "5"
});
var secondInnerList = new List<SecondInner>();
secondInner.Add(new SecondInner
{
Id = 1,
Type = "xx"
});
var firstOuter = new FirstOuter
{
Id = 1,
Name = "John",
Title = "Cena",
Inners = firstInnerList
}
var secondOuter = new SecondOuter
{
Id = 1,
Name = "John",
Inners = secondInnerList,
}
var firstOuterList = new List<FirstOuter> { firstOuter };
var secondOuterList = new List<SecondOuter> { secondOuter };
Need to check if firstOuterList is part of secondOuterList (ignoring the additional properties).
So the foreach way that I have is:
foreach (var item in firstOuterList)
{
var secondItem = secondOuterList.Find(so => so.Id == item.Id);
//if secondItem is null->throw exception
if (item.Name == secondItem.Name)
{
foreach (var firstInnerItem in item.Inners)
{
var secondInnerItem = secondItem.Inners.Find(sI => sI.Id == firstInnerItem.Id);
//if secondInnerItem is null,throw exception
if (firstInnerItem.Type != secondInnerItem.Type)
{
//throw exception
}
}
}
else
{
//throw exception
}
}
//move with normal flow
Please let me know if there is any better approach.
First, do the join of firstOuterList and secondOuterList
bool isSubset = false;
var firstOuterList = new List<FirstOuter> { firstOuter };
var secondOuterList = new List<SecondOuter> { secondOuter };
var jointOuterList = firstOuterList.Join(
secondOuterList,
p => new { p.Id, p.Name },
m => new { m.Id, m.Name },
(p, m) => new { FOuterList = p, SOuterList = m }
);
if(jointOuterList.Count != firstOuterList.Count)
{
isSubset = false;
return;
}
foreach(var item in jointOuterList)
{
var jointInnerList = item.firstInnerList.Join(
item.firstInnerList,
p => new { p.Id, p.Type },
m => new { m.Id, m.type },
(p, m) => p.Id
);
if(jointInnerList.Count != item.firstInnerList.Count)
{
isSubset = false;
return;
}
}
Note: I am assuming Id is unique in its outer lists. It means there will not be multiple entries with same id in a list. If no, then we need to use group by in above query
I think to break the question down..
We have two sets of Ids, the Inners and the Outers.
We have two instances of those sets, the Firsts and the Seconds.
We want Second's inner Ids to be a subset of First's inner Ids.
We want Second's outer Ids to be a subset of First's outer Ids.
If that's the case, these are a couple of working test cases:
[TestMethod]
public void ICanSeeWhenInnerAndOuterCollectionsAreSubsets()
{
HashSet<int> firstInnerIds = new HashSet<int>(GetFirstOuterList().SelectMany(outer => outer.Inners.Select(inner => inner.Id)).Distinct());
HashSet<int> firstOuterIds = new HashSet<int>(GetFirstOuterList().Select(outer => outer.Id).Distinct());
HashSet<int> secondInnerIds = new HashSet<int>(GetSecondOuterList().SelectMany(outer => outer.Inners.Select(inner => inner.Id)).Distinct());
HashSet<int> secondOuterIds = new HashSet<int>(GetSecondOuterList().Select(outer => outer.Id).Distinct());
bool isInnerSubset = secondInnerIds.IsSubsetOf(firstInnerIds);
bool isOuterSubset = secondOuterIds.IsSubsetOf(firstOuterIds);
Assert.IsTrue(isInnerSubset);
Assert.IsTrue(isOuterSubset);
}
[TestMethod]
public void ICanSeeWhenInnerAndOuterCollectionsAreNotSubsets()
{
HashSet<int> firstInnerIds = new HashSet<int>(GetFirstOuterList().SelectMany(outer => outer.Inners.Select(inner => inner.Id)).Distinct());
HashSet<int> firstOuterIds = new HashSet<int>(GetFirstOuterList().Select(outer => outer.Id).Distinct());
HashSet<int> secondInnerIds = new HashSet<int>(GetSecondOuterList().SelectMany(outer => outer.Inners.Select(inner => inner.Id)).Distinct());
HashSet<int> secondOuterIds = new HashSet<int>(GetSecondOuterList().Select(outer => outer.Id).Distinct());
firstInnerIds.Clear();
firstInnerIds.Add(5);
firstOuterIds.Clear();
firstOuterIds.Add(5);
bool isInnerSubset = secondInnerIds.IsSubsetOf(firstInnerIds);
bool isOuterSubset = secondOuterIds.IsSubsetOf(firstOuterIds);
Assert.IsFalse(isInnerSubset);
Assert.IsFalse(isOuterSubset);
}
private List<FirstOuter> GetFirstOuterList() { ... }
private List<SecondOuter> GetSecondOuterList() { ... }
I have a Model called JobReport which looks like this (simplified)
public class JobReport
{
public JobReport()
{
WorkOrders = new List<WorkOrder>();
}
public int JobID { get; set; }
public decimal WorkOrderTotal {get; set; }
public List<WorkOrder> WorkOrders{ get; set; }
}
public class WorkOrder
{
public WorkOrder()
{
Total = 0;
}
public string Trade { get; set; }
public int WorkOrderID { get; set; }
public decimal? Total { get; set; }
}
I now have a Linq query which gets me all the Jobs that have WorkOrders that have a trade which is in a passed array thanks to Linq Query where related entity contains value from array:
jobs = jobs
.Where(x => x.WorkOrders.Any(y => trades.Contains(y.Trade)));
How do I now get the WorkOrderTotal, which is the sum of the Total in the workorders that meet the predicate of the above query? I can't see how to add .Sum() anywhere?
EDIT
Just to confirm, each job needs the sum of it's workorders that are in the given trades.
Perhaps a slightly easier solution to those already posted would be to add a property to your JobReport called WorkOrderValue:
public decimal? WorkOrdersValue { get; set; }
Now you can query on the jobs that meet your criteria:
jobs = jobs
.Where(x => x.WorkOrders
.Any(y => trades.Contains(y.Trade.ToLower())))
.ToList();
And separately calculate the total for each job:
foreach (var job in jobs)
{
job.WorkOrdersValue = job.WorkOrders.Where
(y => trades.Contains(y.Trade.ToLower())).Sum(wo => wo.Total);
}
Try something like this:
IEnumerable<decimal> workOrderTotals = jobs
.Where(x => x.WorkOrders.Any(y => trades.Contains(y.Trade)))
.Select( j => j.WorkOrders.Sum(wo => wo.Total ?? 0));
And here's a test case :
var jobs = new List<JobReport>();
jobs.Add(new JobReport{ WorkOrders = new List<WorkOrder>{ new WorkOrder{ Total = 10} }});
jobs.Add(new JobReport { WorkOrders = new List<WorkOrder> { new WorkOrder { Total = 10 }, new WorkOrder { Total = 10 } } });
The result is an enumerable containing 2 values 10 , 20
Considering this as the test data
JobReport job1 = new JobReport();
job1.JobID = 1;
job1.WorkOrders.Add(new WorkOrder() { WorkOrderID = 2, Trade = "trade1", Total = 10});
job1.WorkOrders.Add(new WorkOrder() { WorkOrderID = 3, Trade = "trade2", Total = 20 });
job1.WorkOrders.Add(new WorkOrder() { WorkOrderID = 4, Trade = "trade1", Total = 25 });
JobReport job2 = new JobReport();
job2.JobID = 2;
job2.WorkOrders.Add(new WorkOrder() { WorkOrderID = 1, Trade = "trade1", Total = 10 });
job2.WorkOrders.Add(new WorkOrder() { WorkOrderID = 5, Trade = "trade2", Total = 20 });
job2.WorkOrders.Add(new WorkOrder() { WorkOrderID = 6, Trade = "trade2", Total = 30 });
job2.WorkOrders.Add(new WorkOrder() { WorkOrderID = 7, Trade = "trade3", Total = 10 });
List<JobReport> jobs = new List<JobReport>();
jobs.Add(job1);
jobs.Add(job2);
You could do something like this.
var groupedJobs = jobs.GroupBy(a => a.JobID)
.Select(b => new { JobId = b.Key, WorkOrdersByTrade = b.Select(c => c.WorkOrders.GroupBy(d => d.Trade)
.Select(g => new { Trade = g.Key, tradeSum = g.Sum(s => s.Total) })) });
Further by defining the following classes
public class TradeTotal
{
public string Trade { get; set; }
public decimal? Total { get; set; }
}
public class JobTrade
{
public int JobId { get; set; }
public List<TradeTotal> TradeTotals { get; set; }
}
You can get the results in the format that you wanted
var JobTradeList = groupedJobs.Select(x => new JobTrade() { JobId = x.JobId, TradeTotals = x.WorkOrdersByTrade.SelectMany(s => s.Select(v => new TradeTotal() { Total = v.tradeSum, Trade = v.Trade })).ToList() }).ToList();
Code may be not 100% clean; but I think this is what you are after.
I need to get a JSON string that looks like the following:
{"1":[{"value":"1", "text":"Basketball"}, {"value":"2", "text":"Tennis"}, {"value":"3", "text":"Football"}],"3":[{"value":"4", "text":"futbol"}]}
The C# code responsible for building this looks like the following:
var sportsEntries = new Dictionary<byte, List<KeyValuePair<int, string>>>();
foreach (var department in Departments)
{
var deptOptions = SportList
.Where(x => x.DeptId == department.DeptId)
.ToDictionary(x => x.SportId, x => x.SportNameName).ToList();
sportsEntries .Add(department.DeptId, deptOptions);
}
var json = JsonConvert.SerializeObject(sportsEntries);
Unfortunately, this approach generates the wrong JSON. The JSON looks like this:
{"1":[{"Key":1,"Value":"Basketball"},{"Key":2,"Value":"Tennis"},{"Key":3,"Value":"Football"}],"3":[{"Key":4, "Value":"Futbol"}]}
I feel like I'm so close. Yet, I'm not sure how to update my C# code to make the resulting JSON look like the format I need. How do I update the C# to output the correct JSON?
Thank you!
You could use something like this:
var sportsEntries = new Dictionary<byte, List<object>();
foreach (var department in Departments)
{
var deptOptions = SportList
.Where(x => x.DeptId == department.DeptId)
.Select(x => new { value = x.SportId, text = x.SportNameName}).ToList();
sportsEntries .Add(department.DeptId, deptOptions);
}
var json = JsonConvert.SerializeObject(sportsEntries);
This solution replaces the initial KeyValuePair<int, string> with object and creates a list of anonymous objects, having the desired properties.
This works:
[TestFixture]
public class SoTest
{
[Test]
public void Test1()
{
var departments = new List<Department>
{
new Department
{
DeptId = 1
}
};
var sportList = new List<Sport>
{
new Sport
{
DeptId = 1,
SportId = 1,
SportName = "Basketball"
},
new Sport
{
DeptId = 1,
SportId = 2,
SportName = "Tennis"
}
};
var sportsEntries = new Dictionary<byte, List<Kvp>>();
foreach (var department in departments)
{
var deptOptions = sportList
.Where(x => x.DeptId == department.DeptId)
.Select(x => new Kvp { Value = x.SportId, Text = x.SportName }).ToList();
sportsEntries.Add(department.DeptId, deptOptions);
}
string json = JsonConvert.SerializeObject(sportsEntries);
Assert.IsNotNullOrEmpty(json);
Debug.Print(json);
}
}
public class Department
{
public byte DeptId { get; set; }
}
public class Sport
{
public byte DeptId { get; set; }
public int SportId { get; set; }
public string SportName { get; set; }
}
[DataContract]
public class Kvp
{
[DataMember(Name = "value")]
public int Value { get; set; }
[DataMember(Name = "text")]
public string Text { get; set; }
}