Develop Reference

Copy add or combine a model

I am having problem adding to the model. I want to have a list in the Root1 or in the Viewmodel like fullname and authors list.
newModel1
AuthorsAccepted count=4
FullName = Jack
AuthorsAccepted count=4
FullName = Time Dean
With the code below it only adds the last one to the Root1. I created a a third model. Is there a way I can add to the third model both the lists or in Root1.
var fullName = "Jack";
var fullName2 = "Tim Dean";
var authors1 = new List<AuthorsAccepted1>() {
new AuthorsAccepted1(){ id = 1, Name="Bill"},
new AuthorsAccepted1(){ id = 2, Name="Steve"},
new AuthorsAccepted1(){ id = 3, Name="jon"},
new AuthorsAccepted1(){ id = 4, Name="nick"}
};
var authors2 = new List<AuthorsAccepted1>() {
new AuthorsAccepted1(){ id = 1, Name="jack"},
new AuthorsAccepted1(){ id = 2, Name="tim"},
new AuthorsAccepted1(){ id = 3, Name="james"},
new AuthorsAccepted1(){ id = 4, Name="mary"}
};
var newModel1 = new Root1();
newModel1.FullName = fullName;
newModel1.AuthorsAccepted = authors1;
var newModel2 = new Root1();
newModel2.FullName = fullName2;
newModel2.AuthorsAccepted = authors2;
}
}
public class Root1
{
public string FullName { get; set; }
public List<AuthorsAccepted1> AuthorsAccepted { get; set; }
}
public class AuthorsAccepted1
{
public string Name { get; set; }
public int id { get; set; }
}
public class Viewmodel
{
public Root1 AllModel { get; set; }
}

Linq Group By on Sets

While working with Linq on Grouping sets, I found a problem while the query is returning the list.
My Code is written in LinqPad
public static void Main()
{
List<RequestEntry> RequestEntries = new List<RequestEntry>(){
new RequestEntry{
RequestId = 1,
RequestedDate = new DateTime(2018, 06, 01),
ApproverUserId = "STEVES",
ApproverUserName = "Steve Smith",
AuthorizerUserId = "JAMESS",
AuthorizerUserName = "James Sutherland"
},
new RequestEntry{
RequestId = 1,
RequestedDate = new DateTime(2018, 06, 01),
ApproverUserId = "GRAHAMS",
ApproverUserName = "Graham Smith",
AuthorizerUserId = "THABANGM",
AuthorizerUserName = "Thabang Moroe"
},
new RequestEntry{
RequestId = 2,
RequestedDate = new DateTime(2018, 06, 02),
ApproverUserId = "STEVES",
ApproverUserName = "Steve Smith",
AuthorizerUserId = "JAMESS",
AuthorizerUserName = "James Sutherland"
},
new RequestEntry{
RequestId = 3,
RequestedDate = new DateTime(2018, 06, 03),
ApproverUserId = "ROBINS",
ApproverUserName = "Robin Smith",
AuthorizerUserId = "TOMH",
AuthorizerUserName = "Tom Harrision"
},
new RequestEntry{
RequestId = 3,
RequestedDate = new DateTime(2018, 06, 03),
ApproverUserId = "CHRISS",
ApproverUserName = "Chris Smith",
AuthorizerUserId = "TOMH",
AuthorizerUserName = "Tom Harrision"
},
new RequestEntry{
RequestId = 3,
RequestedDate = new DateTime(2018, 06, 03),
ApproverUserId = "LIAMS",
ApproverUserName = "Liam Smith",
AuthorizerUserId = "TOMH",
AuthorizerUserName = "Tom Harrision"
}
};
var results = (
from r in RequestEntries
group r by new
{
r.RequestId, r.RequestedDate
} into g
select new RequestWithApprover(){
RequestId = g.Key.RequestId,
RequestedDate = g.Key.RequestedDate,
ApproverUserIds = g.Select(c => c.ApproverUserId).ToList(),
RequestApprovers = g.Select(c => new RequestApprover(){
ApproverUserName = c.ApproverUserName,
ApproverUserId = c.ApproverUserId
}).ToList(),
RequestAuthorizers = g.Select(c => new RequestAuthorizer(){
AuthorizerUserName = c.AuthorizerUserName,
AuthorizerUserId = c.AuthorizerUserId
}).ToList()
}).ToList();
results.Dump();
}
public class RequestEntry
{
public int RequestId
{
get;
set;
}
public string ApproverUserId
{
get;
set;
}
public string ApproverUserName
{
get;
set;
}
public string AuthorizerUserId
{
get;
set;
}
public string AuthorizerUserName
{
get;
set;
}
public DateTime RequestedDate
{
get;
set;
}
}
public class RequestApprover
{
public string ApproverUserId
{
get;
set;
}
public string ApproverUserName
{
get;
set;
}
}
public class RequestAuthorizer
{
public string AuthorizerUserId
{
get;
set;
}
public string AuthorizerUserName
{
get;
set;
}
}
public class RequestWithApprover
{
public int RequestId
{
get;
set;
}
public DateTime RequestedDate
{
get;
set;
}
public List<string> ApproverUserIds
{
get;
set;
}
public List<RequestApprover> RequestApprovers
{
get;
set;
}
public List<RequestAuthorizer> RequestAuthorizers
{
get;
set;
}
}
What I found is, For RequestID =3, the Number of RequestAuthorizer items should be 1, but it had multiplied. I found that in RequestID =3 the Maximum items in any list is 3, the RequestAuthorizer to multiplies to that Number. Refer below snapshot highlighted of the result:
Technically, In RequestId=3 the List<RequestAuthorizer> should only contain the Item of Tom Harrision and the count should be one.
How could I correct it?

How about grouping the RequestAuthorizer?
var results = (
from r in RequestEntries
group r by new
{
r.RequestId, r.RequestedDate
} into g
select new RequestWithApprover(){
RequestId = g.Key.RequestId,
RequestedDate = g.Key.RequestedDate,
ApproverUserIds = g.Select(c => c.ApproverUserId).ToList(),
RequestApprovers = g.Select(c => new RequestApprover(){
ApproverUserName = c.ApproverUserName,
ApproverUserId = c.ApproverUserId
}).ToList(),
RequestAuthorizers = g.
GroupBy(g1 => new {
g1.AuthorizerUserName,
g1.AuthorizerUserId }).
Select(c => new RequestAuthorizer(){
AuthorizerUserName = c.Key.AuthorizerUserName,
AuthorizerUserId = c.Key.AuthorizerUserId
}).ToList()
}).ToList();

Using Moq with Entity Framework 6 - Mocking Include and Where

I'm trying to create some In-Memory dbContext mocks using Moq and using EntityFramework.Testing.Moq extension methods:
https://github.com/scott-xu/EntityFramework.Testing
I'm hitting a brick wall when I'm trying to unit test my eagerly loaded queries using mocked context. The issue is, nothing is selected at all. I know something should be selected, because when I point the same query using LINQPad to my source database, I get the 2 results back that I expect.
I never know how much code etc I need to post, so hopefully the below will help.
Data Diagram
I have two main tables, dbo.Applicant that holds basically user details and dbo.Application, which holds job applications, there are lookup tables that dbo.Application hooks into:
Example Models
This is a code first approach based off the above diagram. I have removed properties to keep the code as clean and to the point for the question:
[Table("Application")]
public partial class Application
{
[Min(1)]
public int Id { get; set; }
[Required]
[StringLength(50)]
public string ApplicationId { get; set; }
[Min(1)]
public int ApplicantId { get; set; }
public virtual Applicant Applicant { get; set; }
}
[Table("Applicant")]
public partial class Applicant
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public Applicant()
{
Applications = new HashSet<Application>();
RowStatus = "L";
}
public int Id { get; set; }
[Required]
public string FullName { get; set; }
[Required]
public string AddressLine1 { get; set; }
[Required]
public string Email { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Application> Applications { get; set; }
}
Context
Again a cut down context, but just in case I'm ask for it in the comments:
public partial class WorkExperienceContext : DbContext
{
public WorkExperienceContext()
: base("name=WorkExperienceContext")
{
this.Configuration.LazyLoadingEnabled = false;
}
public WorkExperienceContext(string userTestConnectionString)
: base(userTestConnectionString)
{
Trace.Write("Using test context " + Add to dictionary);
}
public virtual DbSet<Applicant> Applicants { get; set; }
public virtual DbSet<Application> Applications { get; set; }
}
Unit Test method
The following is (again) a cut down version of the Unit test method where I expect two Application records to be pulled through based off the email.
As you can see from the below, there are:
2 Application records for Lucifer (ApplicantId = 666)
There is one Applicant record with an email of misunderstood#fireandbrimestone.co.uk
My issue is test is null, when querying the database itself with the same code, I get the correct results. I'm perplexed what I need to do. Remember I'm using the EntityFramework.Testing.Moq.SetupData() method which handles the mocking of the DbSet methods and transforming the List<> seed data to an IQueryable collection.
public void InMemory_Find_Application_By_Email_EFMoq()
{
var applications = new List<Application>
{
new Application { Id = 1, ApplicantId = 666, ApplicationId = "1-a", DivisionId = 2, PublishingAreaId = 4, SourceId = 2, SkillsLearnt = "How to pick up pen", RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2, CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay } ,
new Application { Id = 2, ApplicantId = 666, ApplicationId = "1-a", DivisionId = 3, PublishingAreaId = 4, SourceId = 2, SkillsLearnt = "How to pick up pen", RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay } ,
new Application { Id = 3, ApplicantId = 5, ApplicationId = "1-b", DivisionId = 3, PublishingAreaId = 1, SourceId = 2, SkillsLearnt = "Reading a book well" , RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay } ,
new Application { Id = 4, ApplicantId = 5, ApplicationId = "1-b", DivisionId = 2, PublishingAreaId = 1, SourceId = 2, SkillsLearnt = "Reading a book well ", RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2 ,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay } ,
new Application { Id = 5, ApplicantId = 5, ApplicationId = "1-b", DivisionId = 7, PublishingAreaId = 1, SourceId = 2, SkillsLearnt = "Reading a book well" , RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2 ,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay } ,
new Application { Id = 6, ApplicantId = 24, ApplicationId = "1-c", DivisionId = 10, PublishingAreaId = 3, SourceId = 1, SkillsLearnt = "I can now re-iterate stuff", RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay },
new Application { Id = 7, ApplicantId = 21, ApplicationId = "1-d", DivisionId = 2, PublishingAreaId = 2, SourceId = 1, SkillsLearnt = "I made some bread the other day", RowStatus="L", ApplicantStartDateId = 1,
ApplicantDisabilityId = 2 ,CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay }
};
var applicants = new List<Applicant>
{
new Applicant {Id = 5, FullName = "Pen Is", AddressLine1="Somewhere Over the Rainbow", County="West Sussex", Email="pen_is#hotmail.co.uk", RowStatus = "L",
GenderId = 2, EducationId = 1, CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay, PostCode="PEN 1ST", Telephone="N/A"},
new Applicant {Id = 24, FullName = "Gareth Bradley", AddressLine1="an address", County="West Sussex", Email="gareth.bradley#hachette.co.uk", RowStatus = "L",
GenderId = 2, EducationId = 1, CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay, PostCode="bn13 3qb",Telephone="N/A"} ,
new Applicant {Id = 21, FullName = "Lizzy Windsor", AddressLine1="A Palace (Take your pick)", County="Berkshire", Email="HerRoyalMaj#TheCrownJewels.co.uk", RowStatus = "L",
GenderId = 2, EducationId = 1, CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay, PostCode="BE1 1HM",Telephone="N/A"} ,
new Applicant {Id = 666, FullName = "Lucifer MorningStar", AddressLine1="Hotsy Street", County="Down South", Email="misunderstood#fireandbrimes1one.co.uk" , RowStatus = "L",
GenderId = 3, EducationId = 1, CreatedDate = DateTime.Now, CreatedTime = DateTime.Now.TimeOfDay, PostCode="HE11 6SS",Telephone="666-666"}
};
foreach (Applicant applicant in applicants)
{
applicant.Applications = applications.Where(a => a.ApplicantId == applicant.Id).ToArray();
}
foreach (Application application in applications)
{
application.Applicant = applicants.SingleOrDefault(a => a.Id == application.ApplicantId);
}
var mockSet = new Mock<DbSet<Application>>()
.SetupData(applications);
var mockSetUsers = new Mock<DbSet<Applicant>>()
.SetupData(applicants);
var mockContext = new Mock<WorkExperienceContext>();
mockContext.Setup(c => c.Applications).Returns(mockSet.Object);
mockContext.Setup(c => c.Applicants).Returns(mockSetUsers.Object);
var mockService = new WorkExperienceFormService(mockContext.Object);
var test = mockContext.Object
.Applications
.Include(a => a.Applicant)
.Where(e => e.Applicant.Email == "misunderstood#fireandbrimestone.co.uk")
.ToList();
Assert.AreEqual(2, test.Count());
}
The following is proof of my LINQPad is pulling the data without a mocked context:

Maybe it's a typo when you posted the code, but the e-mail for 'Lucifer MorningStar' is
misunderstood#fireandbrimes1one.co.uk instead of
misunderstood#fireandbrimestone.co.uk

Sort 2 tables at the same time via using LinQ

My example contains 2 tables Book and Comment.
Book:
Id Name UserId DateTime
B1 Book1 User1 16/11/2016 11:15:00
B2 Book2 User1 16/11/2016 12:15:00
B3 Book3 User2 16/11/2016 10:15:00
Comment:
Id BookId UserId DateTime
C1 B3 User1 16/11/2016 11:17:00
C2 B1 User1 16/11/2016 11:16:00
List of Book via specific user id:
string userid = "User1";
IEnumerable<Book> books = _context.Books.Where(x => x.UserId == userid);
List of Comment:
IEnumerable<Book> comments = _context.Comments.Where(x => x.UserId == userid);
In activity history (web page), I want to show all books and comments what I have collected via userid, one by one. But, how can I sort 2 objects again via .OrderByDescending(x => x.DateTime)?
My goal:
User1 just postes a new book to the store:
B2 Book2 User1 16/11/2016 12:15:00
Before that, he posted a comment to his own thread:
C1 B1 User1 16/11/2016 11:17:00
Earlier, he posted a comment in another thread (UserId == "User2"):
C2 B3 User1 16/11/2016 11:16:00
Older, he posted a new book to the store:
B1 Book1 User1 16/11/2016 11:15:00
I can classify them via DateTime column (on paper):
16/11/2016 12:15:00
16/11/2016 11:17:00
16/11/2016 11:16:00
16/11/2016 11:15:00
How can I sort it?
UPDATE:
I just found a solution but LinQ. I want a solution using LinQ with same result (for shorter):
namespace MP
{
public class Book
{
public string Id { get; set; }
public string Name { get; set; }
public string UserId { get; set; }
public DateTime DateTime { get; set; }
}
public class Comment
{
public string Id { get; set; }
public string BookId { get; set; }
public string UserId { get; set; }
public string Content { get; set; }
public DateTime DateTime { get; set; }
}
public class Result
{
public object Object { get; set; }
public DateTime DateTime { get; set; }
}
class Program
{
static void Main()
{
try
{
string userid = "User1";
var books = new List<Book>();
books.Add(new Book { Id = "B1", Name = "Book1", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 11, 15, 00) });
books.Add(new Book { Id = "B2", Name = "Book2", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 12, 15, 00) });
books.Add(new Book { Id = "B3", Name = "Book3", UserId = "User2", DateTime = new DateTime(2016, 11, 16, 10, 15, 00) });
var comments = new List<Comment>();
comments.Add(new Comment { Id = "c1", BookId = "B3", UserId = "User1", Content = "cmt1", DateTime = new DateTime(2016, 11, 16, 11, 17, 00) });
comments.Add(new Comment { Id = "c2", BookId = "B1", UserId = "User1", Content = "cmt2", DateTime = new DateTime(2016, 11, 16, 11, 16, 00) });
var result = new List<Result>();
books.ForEach(x =>
{
if (x.UserId == userid)
{
result.Add(new Result { Object = x, DateTime = x.DateTime });
}
});
comments.ForEach(x =>
{
if (x.UserId == userid)
{
result.Add(new Result { Object = x, DateTime = x.DateTime });
}
});
result = result.OrderByDescending(x => x.DateTime).ToList();
foreach (var item in result)
{
Type type = item.Object.GetType();
if (type == typeof(MP.Book))
{
var book = (Book)item.Object;
Console.WriteLine($"Book: Id: {book.Id} - Name: {book.Name} - DateTime: {book.DateTime}");
}
if (type == typeof(MP.Comment))
{
var cmt = (Comment)item.Object;
Console.WriteLine($"Comment: Id: {cmt.Id} - Content: {cmt.Content} - DateTime: {cmt.DateTime}");
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
Result:

Here's solution that should work for you. Basically I took your idea of objectifying the data and creating a linq query that creates a list of objects from each list and sorts them according to the DateTime. By overriding the ToString() method printing the contents of the list becomes very simple:
public class Book
{
public const string className = "Book";
public string Id { get; set; }
public string Name { get; set; }
public string UserId { get; set; }
public DateTime DateTime { get; set; }
public override string ToString()
{
return $"Book: Id: {Id.PadRight(7)} - Name: {Name.PadRight(14)} - DateTime: {DateTime}";
}
}
public class Comment
{
public string Id { get; set; }
public string BookId { get; set; }
public string UserId { get; set; }
public string Content { get; set; }
public DateTime DateTime { get; set; }
public override string ToString()
{
return $"Comment: Id: {Id.PadRight(7)} - Content: {Content.PadRight(11)} - DateTime: {DateTime}";
}
}
class Program
{
static void Main()
{
try
{
string userid = "User1";
var books = new List<Book>();
books.Add(new Book { Id = "B1", Name = "Book1", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 11, 15, 00) });
books.Add(new Book { Id = "B2", Name = "Book2", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 12, 15, 00) });
books.Add(new Book { Id = "B3", Name = "Book3", UserId = "User2", DateTime = new DateTime(2016, 11, 16, 10, 15, 00) });
var comments = new List<Comment>();
comments.Add(new Comment { Id = "c1", BookId = "B3", UserId = "User1", Content = "cmt1", DateTime = new DateTime(2016, 11, 16, 11, 17, 00) });
comments.Add(new Comment { Id = "c2", BookId = "B1", UserId = "User1", Content = "cmt2", DateTime = new DateTime(2016, 11, 16, 11, 16, 00) });
var test = (from b in books
where b.UserId == userid
select (object)b).Concat
(from c in comments
where c.UserId == userid
select (object)c).OrderBy(x => x.GetType() == typeof(Book)?((Book)x).DateTime:((Comment)x).DateTime);
foreach(var o in test)
{
Console.WriteLine(o);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
Did some more thinking, using generic objects always makes me uneasy, and came up with a better solution. by using a base class with the common properties and the book and comment classes deriving from that, the list you make can contain either book or comment and it can be filtered and sorted by any of the base class properties:
public class Item
{
public string Id { get; set; }
public string UserId { get; set; }
public DateTime DateTime { get; set; }
}
public class Book:Item
{
public string Name { get; set; }
public override string ToString()
{
return $"Book: Id: {Id.PadRight(7)} - Name: {Name.PadRight(14)} - DateTime: {DateTime}";
}
}
public class Comment:Item
{
public string BookId { get; set; }
public string Content { get; set; }
public override string ToString()
{
return $"Comment: Id: {Id.PadRight(7)} - Content: {Content.PadRight(11)} - DateTime: {DateTime}";
}
}
Creating the filtered and sorted list becomes much simpler:
string userid = "User1";
var items = new List<Item>();
items.Add(new Book { Id = "B1", Name = "Book1", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 11, 15, 00) });
items.Add(new Book { Id = "B2", Name = "Book2", UserId = "User1", DateTime = new DateTime(2016, 11, 16, 12, 15, 00) });
items.Add(new Book { Id = "B3", Name = "Book3", UserId = "User2", DateTime = new DateTime(2016, 11, 16, 10, 15, 00) });
items.Add(new Comment { Id = "c1", BookId = "B3", UserId = "User1", Content = "cmt1", DateTime = new DateTime(2016, 11, 16, 11, 17, 00) });
items.Add(new Comment { Id = "c2", BookId = "B1", UserId = "User1", Content = "cmt2", DateTime = new DateTime(2016, 11, 16, 11, 16, 00) });
var test = (from b in items
where b.UserId == userid
orderby b.DateTime
select b);
foreach (var o in test)
{
Console.WriteLine(o);
}

Please try this one:
var vm = from b in Book
join c in Comment on b.Id equals c.BookId into d
where b.UserId == userid
orderby b.DateTime
select new {
OrderedDate = from item in d
orderby item.DateTime
select item
}
or another approach by UNION it
var vm = (from a in book
where a.UserId == userid
select new { a.DateTime })
.Union
(from b in Comment
where (x=> x.Book.Any(y=>y.UserId == userid))
select new { b.DateTime })
.Select(c => new { c.DateTime }).OrderBy(d => d.DateTime);

If I understand you correctly, you would like to display the records of two tables with different columns in a single grid.
Which columns are to be displayed?
Lets say they are ID, TYPE (either book entry or comment entry) and DT (DateTime).
var result = (from b in _context.Books
where b.UserId = userid
select new {b.Id Id, "BOOK" Type, b.DateTime DT})
.Union(
(from c in _context.Comments
where c.UserId = userid
select new {c.Id Id, "COMMENT" Type, c.DateTime DT})
).OrderByDescending(x => x.DT);

this is how i did,.
public class BookAndComment
{
public DateTime DateTime { get; set; }
public Book Book { get; set; }
public Comment Comment { get; set; }
}
and query
var orderedBooksAndComments = = books.Where(book => book.UserId == userId).Select(book =>
new BookAndComment
{
DateTime = book.DateTime,
Book = book
}).Union(comments.Where(comment => comment.UserId == userId).Select(comment =>
new BookAndComment
{
DateTime = comment.DateTime,
Comment = comment
}
)).OrderByDescending(bookAndComment => bookAndComment.DateTime).ToList();
than
foreach (var item in orderedBooksAndComments)
{
if(item.Book!=null)
{
// Do something
}else
{
var comment = item.Comment;
// comment should not be null here.
// Do something.
}
}

How to populate array element defined inside the class

How to populate array element defined inside the class? I would like to Populate List of student with array of Marks,which i am not able to locate .
public class Marks
{
public int ENG { get; set; }
public int MATHS { get; set; }
}
public class Student
{
public string empName { set; get; }
public string empAddress { set; get; }
public Marks[] StudentMarks { set; get; }
}
var objs = new List<Student>()
{
new Employee() {empName = "Manish" empAddress = "MUM"....array element with Marks of two subjects
new Employee() {empName = "Manoj", empAddress = "MUM"....arrayelement with Marks of two subjects
}

In order to initialize array in a single line you should use one of the following code
int[] n1 = new int[4] {2, 4, 6, 8};
int[] n2 = new int[] {2, 4, 6, 8};
int[] n3 = {2, 4, 6, 8};
In your case, you should populate your array with Marks objects.
Marks[] MarksArray = new [] {new Marks() {ENG = 1, MATHS = 1}, new Marks() {ENG = 2, MATHS = 2}};
This array contains 2 marks - new Marks() {ENG = 1, MATHS = 1} and new Marks() {ENG = 2, MATHS = 2}.
You can read find more examples here - https://msdn.microsoft.com/en-us/library/aa287601(v=vs.71).aspx
So you can create your objects this way
var objs = new List<Student>()
{
new Student() {empName = "Manish", empAddress = "MUM", StudentMarks = new [] {new Marks() {ENG = 1, MATHS = 1}, new Marks() {ENG = 2, MATHS = 2}} },
new Student() {empName = "Manish", empAddress = "MUM", StudentMarks = new [] {new Marks() {ENG = 1, MATHS = 1}, new Marks() {ENG = 2, MATHS = 2}} },
};

If you were concerned with the syntax only then this would do:
void Main()
{
var objs = new List<Employee>()
{
new Employee() {
empName = "Manish",
empAddress = "MUM",
StudentMarks = new Marks[] {
new Marks {ENG=10, MATHS = 100},
new Marks { ENG=20, MATHS = 80}, }},
new Employee() {
empName = "Manoj",
empAddress = "MUM",
StudentMarks = new Marks[] {
new Marks { ENG=59, MATHS = 40},
new Marks { ENG=60, MATHS = 80},
new Marks { ENG=80, MATHS = 10},
new Marks { MATHS = 90},
new Marks { ENG=70},}
},
};
foreach (var student in objs)
{
Console.WriteLine("{0} - {1}", student.empName, student.empAddress);
foreach (var mark in student.StudentMarks)
{
Console.WriteLine("Eng:{0}, Maths:{1}", mark.ENG, mark.MATHS);
}
}
}
public class Marks
{
public int ENG { get; set; }
public int MATHS { get; set; }
}
public class Student
{
public string empName { set; get; }
public string empAddress { set; get; }
public Marks[] StudentMarks { set; get; }
}
public class Employee : Student
{ }
However, that is not a good model. A better model would be like this:
void Main()
{
var objs = new List<Student>()
{
new Student() {
Name = "Manish",
Address = "MUM",
StudentMarks = new List<Mark> {
new Mark {Name="Eng", Score = 50},
new Mark {Name="Maths", Score = 60},
}
},
new Student() {
Name = "Manoj",
Address = "MUM",
StudentMarks = new List<Mark> {
new Mark {Name="Maths", Score = 100},
new Mark {Name="Eng", Score = 80},
new Mark {Name="Eng", Score = 70},
new Mark {Name="Eng", Score = 90},
new Mark {Name="Maths", Score = 90},
}
},
};
foreach (var student in objs)
{
Console.WriteLine("{0} - {1}", student.Name, student.Address);
foreach (var mark in student.StudentMarks)
{
Console.WriteLine("Name:{0}, Score:{1}", mark.Name, mark.Score);
}
}
}
public class Mark
{
public string Name { get; set; }
public int Score { get; set; }
}
public class Student
{
public string Name { set; get; }
public string Address { set; get; }
public List<Mark> StudentMarks { set; get; }
}
This one is still not very good. A better one might be:
void Main()
{
var objs = new List<Student>()
{
new Student() {
Name = "Manish",
Address = "MUM",
StudentMarks = new Dictionary<string,List<int>> {
{"Maths", new List<int> {60,70,50}},
{"Eng", new List<int> {80,70,90}},
}
},
new Student() {
Name = "Manoj",
Address = "MUM",
StudentMarks = new Dictionary<string,List<int>> {
{"Maths", new List<int> {70,90}},
{"Eng", new List<int> {40,50,60,60}},
}
},
};
foreach (var student in objs)
{
Console.WriteLine("{0} - {1}", student.Name, student.Address);
foreach (var course in student.StudentMarks)
{
Console.WriteLine("Course:{0}, Average:{1}", course.Key, course.Value.Average());
foreach (var score in course.Value)
{
Console.WriteLine(score);
}
}
}
}
public class Mark
{
public string Name { get; set; }
public int Score { get; set; }
}
public class Student
{
public string Name { set; get; }
public string Address { set; get; }
public Dictionary<string,List<int>> StudentMarks { set; get; }
}
And there are better ones.