In this post we are going to see how we are using the OfType method in Linq, for that we are taking a example of three classes
We are creating a generic list where we can add both types under one collection , but we are filtering that using the Typeof method for getting the student collection alone.
Output:
********************
Name : Ramu, Marks 450
Name : Hanish, Marks 420
Name : Suresh, Marks 350
public abstract class Person
{
public int ID { set; get; }
public string Name { set; get; }
public int
PhoneNumber { set; get; }
public string Address
{ set; get; }
}
public class Employee : Person
{
public string
Designation { set; get; }
public string
Department { set; get; }
public int
CollegeStudentId { set; get; }
}
public class Student:Person
{
public string
Department { set; get; }
public int
TotalMarks { set; get; }
}
We are creating a generic list where we can add both types under one collection , but we are filtering that using the Typeof method for getting the student collection alone.
List<Person> genericList = new List<Person>() {
new Student() { ID=2,
Name="Ramu",
Address="Delhi",
TotalMarks=450,
Department="CSE",
PhoneNumber=23233112
},
new Employee() { ID
= 103,
Name="Rajesh",
Department="Development",
Address="TN",
PhoneNumber=232323,
CollegeStudentId=1,
Designation="Architect"
},
new Student(){
ID=5,
Name="Hanish",
Address="Salem",
TotalMarks=420,
Department="EEE",
PhoneNumber=3442323
},
new Employee(){
ID = 101,
Name="Hanish",
Department="Development",
Address="US",
PhoneNumber=238564334,
CollegeStudentId=5,
Designation="TL"
},
new Student(){
ID =4,
Name="Suresh",
Address="Porur",
TotalMarks=350,
Department="ECE",
PhoneNumber=12321312
}
};
IEnumerable<Student> studs = genericList.OfType<Student>();
foreach (var item in studs)
{
Console.WriteLine(string.Format("Name : {0},
Marks
{1}",item.Name,item.TotalMarks));
}
Console.Read();
Output:
********************
Name : Ramu, Marks 450
Name : Hanish, Marks 420
Name : Suresh, Marks 350
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