Question

I have class student :

public class Student
    {
        public string Name { get; set; }
        public string Age { get; set; }
        public Student()
        {
        }
        public List<Student> getData()
        {
            List<Student> st = new List<Student> 
            {
                new Student{Name="Pham Nguyen",Age = "22"},
                new Student{Name="Phi Diep",Age = "22"},
                new Student{Name="Khang Tran",Age = "28"},
                new Student{Name="Trong Khoa",Age = "28"},
                new Student{Name="Quan Huy",Age = "28"},
                new Student{Name="Huy Chau",Age = "28"},
                new Student{Name="Hien Nguyen",Age = "28"},
                new Student{Name="Minh Sang",Age = "28"},
            };
            return st;
        }        
    }

How can I take data in this class? ( I mean – example : I want take Name=”Minh Sang”,Age = “28” to show).

sorry about this question. but i don’t know where to find it.

thanks all

Answer 1

EDIT 1:
Add these methods to your class:

public Student getStudent(int age, string name)
{
    return this.getData().Find(s => Convert.ToInt32(s.Age) == age && s.Name.Equals(name));
}

public Student getByIndex(int index)
{
    Student s = null;
    // maxIndex will be: 7
    // your array goes from 0 to 7
    int maxIndex = this.getData().Count() - 1;
    // If your index does not exceed the elements of the array:
    if (index <= maxIndex)
        s  = this.getData()[index];
    return s;
}

• I convert the age to int if you need to evaluate in future > or <.

EDIT 2:
Then invoke the methods like this:

    Student st = new Student();
    // s1 and s2 will return null if no result found.
    Student s1 = st.getStudent(28, "Minh Sang");
    Student s2 = st.getByIndex(7);

    if (s1 != null)
        Console.WriteLine(s1.Age);
        Console.WriteLine(s1.Name);
    if (s2 != null)
        Console.WriteLine(s2.Age);
        Console.WriteLine(s2.Name);