public static void PrintStudentName(Student3 std)
{
if (std == null)
{
throw new NullReferenceException("Student object is null. ");
}
Console.WriteLine(std.StudentName);
}
static void Main1()
{
//The Linq Query to Get All the Students--------------------------------------------------------------------------------------------------------------------
Console.WriteLine("Before Sorting:");
IEnumerable <Student3> students0 = Student3.GetAllStudetns();
foreach (Student3 stu in students0)
{
Console.WriteLine(stu.TotalMarks + "\t" + stu.Name + "\t" + stu.StudentID);
}
Console.WriteLine();
//+++++++++++++++++++++++++++++++++++++++++++++++++Sorting By Using Primary and Secondary Sort +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//a) Sorts Students first by TotalMarks in ascending order(Primary Sort)
//b) The 4 Students with TotalMarks of 800, will then be sorted by Name in ascending order(First Secondary Sort)
//c) The 2 Students with Name of John, will then be sorted by StudentID in ascending order(Second Secondary Sort)
Console.WriteLine("Sorted Order by using Linq:");
IOrderedEnumerable <Student3> students1 = Student3.GetAllStudetns().OrderBy(stu => stu.TotalMarks).ThenBy(stu => stu.Name).ThenByDescending(stu => stu.StudentID);
foreach (Student3 stu in students1)
{
Console.WriteLine(stu.TotalMarks + "\t" + stu.Name + "\t" + stu.StudentID);
}
Console.WriteLine();
//Implementation of above Query by Using Sql Like Query-----------------------------------------------------------------------------------------------------
Console.WriteLine("Sorted Order by using Sql Like Queries:");
IOrderedEnumerable <Student3> students2 = from stu in Student3.GetAllStudetns()
orderby stu.TotalMarks, stu.Name, stu.StudentID descending
select stu;
foreach (Student3 stu in students2)
{
Console.WriteLine(stu.TotalMarks + "\t" + stu.Name + "\t" + stu.StudentID);
}
Console.WriteLine();
//Reversing of the Collection of Student--------------------------------------------------------------------------------------------------------------------
Console.WriteLine("Before Revsering:");
IEnumerable <Student3> students3 = Student3.GetAllStudetns();
foreach (Student3 stu in students3)
{
Console.WriteLine(stu.StudentID + "\t" + stu.Name + "\t" + stu.TotalMarks);
}
Console.WriteLine();
Console.WriteLine("After Revsering:");
IEnumerable <Student3> result0 = students3.Reverse();
foreach (Student3 stu in result0)
{
Console.WriteLine(stu.StudentID + "\t" + stu.Name + "\t" + stu.TotalMarks);
}
}
public static void Main()
{
Student3 std = null;
try
{
PrintStudentName(std);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadKey();
}
