static void Main()
{
Console.WriteLine("Print all students");
for (int i = 1; i <= sampleStudents.Count; i++)
{
Console.WriteLine("Student " + i + ":\n");
Console.WriteLine(sampleStudents[i - 1]);
Console.WriteLine();
}
//problem 9
// Select only the students from group 2
var studentsFromGroup2 =
from student in sampleStudents
where student.GroupNumber == 2
select student;
// Order the students from group 2 by first name
var orderedStudentsFromGroup2 =
from student in studentsFromGroup2
orderby student.FirstName
select student;
Console.WriteLine("Students from group 2, ordered by first name (using LINQ):\n");
foreach (Student student in orderedStudentsFromGroup2)
{
Console.WriteLine(student);
Console.WriteLine();
}
Console.WriteLine("Students from group 2, ordered by first name (using extension methods):\n");
var orderedStudents2 = sampleStudents.Where(x => x.GroupNumber == 2).OrderBy(x => x.FirstName);
foreach (Student student in orderedStudents2)
{
Console.WriteLine(student);
Console.WriteLine();
}
// problem 11: extract all students w/ email in abv.bg using LINQ
var studentsWithEmailsInAbv =
from student in sampleStudents
where student.Email.Contains("@abv.bg")
select student;
Console.WriteLine("Students with emails in abv.bg:\n");
foreach (Student student in studentsWithEmailsInAbv)
{
Console.WriteLine(student);
Console.WriteLine();
}
// problem 12: Extract all students w/ phones in Sofia, using LINQ
var studentsWithPhonesInSofia =
from student in sampleStudents
where student.Phone.StartsWith("02") || student.Phone.StartsWith("+3592")
select student;
Console.WriteLine("Students with phones in Sofia:\n");
foreach (Student student in studentsWithPhonesInSofia)
{
Console.WriteLine(student);
Console.WriteLine();
}
// problem 13: Select all students that have at least one mark Excellent (6)
// into a new anonymous class that has properties – FullName and Marks.
var studentsWithExcellentMark =
from student in sampleStudents
where student.Marks.Contains((int)Marks.Excellent)
select new
{
FullName = student.FirstName + " " + student.LastName,
MarksList = student.Marks
};
Console.WriteLine("Students that have at least one excellent mark, each in new anonymous class with " +
"properties Fullname and MarksList:\n");
foreach (var student in studentsWithExcellentMark)
{
Console.WriteLine("Full name: {0}", student.FullName);
Console.WriteLine("Marks: {0}", string.Join(", ", student.MarksList));
Console.WriteLine();
}
// problem 14: Write down a similar program that extracts the students with exactly two marks "2".
var studentsWithTwoTwos = sampleStudents.Where(x => x.Marks.FindAll(y => y == 2).Count == 2).
Select(x => new
{
FullName = x.FirstName + " " + x.LastName,
MarksList = x.Marks
});
Console.WriteLine("Students that have exactly two poor marks, each in new anonymous class with " +
"properties Fullname and MarksList:\n");
foreach (var student in studentsWithTwoTwos)
{
Console.WriteLine("Full name: {0}", student.FullName);
Console.WriteLine("Marks: {0}", string.Join(", ", student.MarksList));
Console.WriteLine();
}
// problem 15: Extract all Marks of the students that enrolled in 2006.
// (The students from 2006 have 06 as their 5-th and 6-th digit in the FN).
var studentsFrom2006 = sampleStudents.Where(x => x.FacultyNumber[4] == '0' && x.FacultyNumber[5] == '6');
var allMarksFrom2006 = new List<int>();
foreach (var student in studentsFrom2006)
{
allMarksFrom2006.AddRange(student.Marks);
}
Console.WriteLine("All marks of the students, enrolled in 2006:\n{0}", string.Join(", ", allMarksFrom2006));
Console.WriteLine();
// problem 16:
Group group1 = new Group(1, "Developmental evolutionary biology");
Group group2 = new Group(2, "Science");
Group group3 = new Group(3, "Computer Science");
List<Group> groups = new List<Group> { group1, group2, group3 };
var studentsFromEvoDevo =
from someGroup in groups
where someGroup.GroupNumber == 1
join student in sampleStudents on someGroup.GroupNumber equals student.GroupNumber
select new
{
Name = student.FirstName + " " + student.LastName,
Department = someGroup.DepartmentName
};
Console.WriteLine("All students from evo-devo, extracted as new anonymous classes," +
" containing properties Name and Department:");
foreach (var student in studentsFromEvoDevo)
{
Console.WriteLine(student);
}
}
public static void Main()
{
List<Student> studentsList = new List<Student>
{
new Student("Gosho", "Petkov", "042000", "02203050", "*****@*****.**", new List<int> { 2, 3, 4 }, 2),
new Student("Pesho", "Hubavecov", "042006", "25503250", "*****@*****.**", new List<int> { 2, 2, 2 }, 1),
new Student("Gocho", "Gochev", "042001", "02202220", "*****@*****.**", new List<int> { 6, 6, 6 }, 2),
new Student("Mmmm", "Aaaaa", "012006", "202210", "*****@*****.**", new List<int> { 6, 2, 2 }, 3),
new Student("Aaaa", "Aaaaa", "012007", "20221550", "*****@*****.**", new List<int> { }, 3),
new Student("bbb", "bb", "012007", "0220221550", "*****@*****.**", new List<int> { }, 2),
new Student("ccc", "wwww", "012006", "0220221550", "*****@*****.**", new List<int> { 2, 2, 3 }, 2)
};
Group groupMath = new Group(1, "Mathematics");
Group groupPhilosophy = new Group(2, "Philosophy");
Group groupLiterature = new Group(3, "Literature");
List<Group> listOfGroups = new List<Group>
{
new Group(1, "Mathematics"),
new Group(2, "Philosophy"),
new Group(3, "Literature")
};
GroupMath(studentsList, listOfGroups);
// P9
var group2LINQ = Group2LINQMethod(studentsList);
Console.WriteLine("Sorted list using LINQ:");
Console.WriteLine(string.Join(", ", group2LINQ));
Console.WriteLine();
// P10
var group2Lambda = Group2LambdaMethod(studentsList);
Console.WriteLine("Sorted list using lambda operations and extensions:");
Console.WriteLine(string.Join(", ", group2Lambda));
Console.WriteLine();
// P11
var emailGroup = EmailCheck(studentsList);
Console.WriteLine("All students with abv.bg mail provider:");
Console.WriteLine(string.Join(", ", emailGroup));
Console.WriteLine();
// P12
var sofiaPhonesGroup = SofiaPhones(studentsList);
Console.WriteLine("All students with Sofia phones:");
Console.WriteLine(string.Join(", ", sofiaPhonesGroup));
Console.WriteLine();
// P13
MarksSix(studentsList);
// P14
MarksTwo(studentsList);
// P15
List<int> extractedMarks = AllMarks(studentsList);
Console.WriteLine("All marks of the students with FN 2006:");
Console.WriteLine(string.Join(", ", extractedMarks));
Console.WriteLine();
// P18
SortedByGroupsNumberLINQ(studentsList);
// P19
SortedByGroupsNumberExtensionMethods(studentsList);
}
static void Main()
{
//Using the class Student defined in 03-05.Students project.
List<Student> classB = new List<Student>();
Student georgiStudent = new Student("Georgi", "Andonov", 20, "456009", 2, "8893434544", "*****@*****.**");
Student mihailStudent = new Student("Mihail", "Manov", 21, "123006", 1, "88933333", "*****@*****.**");
Student alexanderStudent = new Student("Alexander", "Primorski", 2, "466008", 2);
Student ivoStudent = new Student("Ivo", "Antonov", 23, "555005", 3, "063 23434544", "*****@*****.**");
Student grishaStudent = new Student("Grisha", "Panchev", 20, "435005", 3, "02 44444", "*****@*****.**");
Student panchoStudent = new Student("Pancho", "Ganchev", 24, "231006", 2, "", "*****@*****.**");
classB.Add(georgiStudent);
classB.Add(mihailStudent);
classB.Add(alexanderStudent);
classB.Add(ivoStudent);
classB.Add(grishaStudent);
classB.Add(panchoStudent);
georgiStudent.Marks.Add(new Marks(4));
georgiStudent.Marks.Add(new Marks(6));
georgiStudent.Marks.Add(new Marks(6));
georgiStudent.Marks.Add(new Marks(5.5));
alexanderStudent.Marks.Add(new Marks(3.5));
ivoStudent.Marks.Add(new Marks(2));
ivoStudent.Marks.Add(new Marks(2));
grishaStudent.Marks.Add(new Marks(4.25));
grishaStudent.Marks.Add(new Marks(5.60));
panchoStudent.Marks.Add(new Marks(6));
//Problem 9 - using Linq only
PrintSeparator("Problem 9 - Student groups");
var studentsInGroup2 =
from student in classB
where student.GroupNumber == 2
orderby student.FirstName
select student;
foreach (var student in studentsInGroup2)
{
Console.WriteLine("Name: {0} - Group: {1}", student.FirstName, student.GroupNumber);
}
//Problem 10 - using Linq and Lambda
PrintSeparator("Problem 10 - Student groups extensions");
var studentsInGroup = classB
.Where(st => st.GroupNumber == 2)
.OrderBy(st => st.FirstName)
.ToList();
foreach (var student in studentsInGroup)
{
Console.WriteLine("Name: {0} - Group: {1}",student.FirstName, student.GroupNumber);
}
//Problem 11 - Extract students by email
PrintSeparator("Problem 11 - Extract students by email");
var studentsWithABVEmai = classB
.Where(st => st.Email.EndsWith("abv.bg"))
.ToList();
foreach (var student in studentsWithABVEmai)
{
Console.WriteLine("Name: {0} - Email: {1}",student.FirstName, student.Email);
}
//Problem 12 - Extract students by phone
PrintSeparator("Problem 12 - Extract students by phone");
var studentsPhoneInSofia = classB
.Where(st => st.Tel.StartsWith("02"))
.ToList();
foreach (var student in studentsPhoneInSofia)
{
Console.WriteLine("Name: {0} - Tel: {1}", student.FirstName, student.Tel);
}
//Problem 13 - Extract students by marks
PrintSeparator("Problem 13 - Extract students by marks");
var excellentStudents = classB
.Where(st => st.Marks.Any(m => m.Mark==6))
.Select(s => new {FullName = s.FirstName+" "+s.LastName, allMarks = s.PrintMarks()})
.ToList();
foreach (var student in excellentStudents)
{
Console.WriteLine("Name: {0} - Marks: {1}", student.FullName, student.allMarks);
}
//Problem 14 - Extract students with two marks
PrintSeparator("Problem 14 - Extract students with two marks");
var studentsTwoMarks = classB
.Where(st => st.Marks.Count(x => x.Mark==2)==2)
.Select(s => new { FullName = s.FirstName + " " + s.LastName, allMarks = s.PrintMarks() })
.ToList();
foreach (var student in studentsTwoMarks)
{
Console.WriteLine("Name: {0} - Marks: {1}", student.FullName, student.allMarks);
}
//Problem 15 - Extract marks
PrintSeparator("Problem 15 - Extract marks");
var studentsFrom2006 = classB
.Where(st => st.FN.Substring(4,2)=="06")
.ToList();
foreach (var student in studentsFrom2006)
{
Console.WriteLine("Name: {0} - FN: {1}", student.FirstName, student.FN);
}
//Problem 16* - Groups
PrintSeparator("Problem 16* - Groups");
List<Group> departments = new List<Group>();
Group math = new Group(2, "Mathemathics");
Group eng = new Group(1, "English");
Group chem = new Group(3, "Chemistry");
departments.Add(math);
departments.Add(eng);
departments.Add(chem);
var studentsMathemathics =
from student in classB
join dep in departments on student.GroupNumber equals dep.GroupNumber
where dep.DepartmentName == "Mathemathics"
select new { Fullname = student.FirstName + " " + student.LastName, dep.DepartmentName };
foreach (var person in studentsMathemathics)
{
Console.WriteLine("Student: {0} ,Department: {1}", person.Fullname, person.DepartmentName);
}
//Problem 18 - Grouped by GroupNumber with Linq
PrintSeparator("Problem 18 - Grouped by GroupNumber with Linq");
var groupedStudents2 =
from students in classB
group students by students.GroupNumber;
foreach (var group in groupedStudents2)
{
Console.WriteLine("Group {0}", group.Key);
foreach (var student in group)
{
Console.WriteLine("Student: {0} {1}", student.FirstName, student.LastName);
}
}
//Problem 19 - Grouped by GroupNumber with extension methods
PrintSeparator("Problem 19 - Grouped by GroupNumber with extension methods");
var groupedStudents = classB
.GroupBy(st => st.GroupNumber)
.ToList();
foreach (var group in groupedStudents)
{
Console.WriteLine("Group {0}", group.Key);
foreach (var student in group)
{
Console.WriteLine("Student: {0} {1}", student.FirstName, student.LastName);
}
}
}
