How to Sort 2 different string list into another List array

Question

User321489315 posted

Hi All, 

I am getting bit complexity while sorting 2 different list of string arrays into another list of string array. Please help me.

I have below 2 different lists 

List<string> student1 = new List<string> { "RoleNo1", "RoleNo5", "RoleNo3" };
List<string> student2 = new List<string> { "RoleNo2", "RoleNo4" };

i want output of above 2 strings into another list with sorted order like below

List<string> finalStudentOrder = new List<string> { "RoleNo1", "RoleNo2", "RoleNo3", "RoleNo4", "RoleNo5" };

Please help me to achieve this. 

Thanks in Advance,

Chandu

Answer 1

User753101303 posted

Hi,

I would do it this way :

using System;
using System.Collections.Generic;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<string> student1 = new List<string> { "RoleNo1", "RoleNo5", "RoleNo3" };
            List<string> student2 = new List<string> { "RoleNo2", "RoleNo4" };
            List<string> finalStudentOrder = new List<string>(student1); // create a new list from list 1
            finalStudentOrder.AddRange(student2); // append list 2
            finalStudentOrder.Sort(); // sort
            foreach(var item in finalStudentOrder)
            {
                Console.WriteLine(item);
            }
        }
    }
}

Or is this what you find a bit complex? Another option would be to use Linq. Else be explicit about what you tried and which kind of complexity you ran into.

Answer 2

User-330142929 posted

Hi Chandu_king,

According to your description, I have made a demo, wish it is useful to you.

List<string> student1 = new List<string> { "RoleNo1", "RoleNo5", "RoleNo3" };

List<string> student2 = new List<string> { "RoleNo2", "RoleNo4" };

List<string> finalStudentOrder = student1.Concat(student2).OrderBy(x => x.Substring(x.Length - 1, 1)).ToList();
foreach (var item in finalStudentOrder)

        {
            Console.WriteLine(item);
        }

Because the List<T> implements The list<T> interface, we could use the Concat method to achieve the purpose of connecting two objects. Then we could use orderby interface to achieve sorting.

Feel free to let me know if you have any question.

Best Regards

Abraham