Assigning one class object to another class property

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Hi, I am new to .Net. We have a task to build to classes Department, Employee. In Department, two properties DeptId,DeptName. In Employee, four properties EmpId,EmpName,EmpSalary , object of Department. So that department class values will get automatically bounded to employee class. We need to populate field values with help of collections.
We tried like this.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;

namespace employee
{
    public class Department
    {
        public int deptId { get; set; }
        public string deptName { get; set; }
    }
    public class Employee
    {
        private employee.Department dept;

        public Employee(employee.Department dept)
        {
            // TODO: Complete member initialization
            this.dept = dept;
        }
        public int empId { get; set; }
        public string empName { get; set; }
        public int emPSalary { get; set; }
        public Department Department { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            ArrayList list = new ArrayList();
            Department dept = new Department();
            dept.deptId = 1;
            dept.deptName = "IT";
            list.Add(dept);
            dept = new Department();
            dept.deptId = 2;
            dept.deptName = "HR";
            list.Add(dept);
            ArrayList list1 = new ArrayList();
            Employee emp = new Employee(dept);
            emp.empId = 100;
            emp.empName = "anusha";
            emp.emPSalary = 10000;
            emp.Department = dept;
            list1.Add(emp);
            emp = new Employee(dept);
            emp.empId = 101;
            emp.empName = "usha";
            emp.emPSalary = 20000;
            emp.Department = dept;
            list1.Add(emp);

            var query = from Employee employee in list1
                        where employee.empId == 100
                        select employee;
            foreach(Employee e in query)
            {
                Console.WriteLine(e.empId+""+e.empName +" "+e.emPSalary+""+e.Department+"");

                Console.ReadLine();
            }
            
        }
    }
}

While debuging with F10key we are getting only second values of department class i.e DeptId=2 at Employee emp = new Employee(dept);.

Any Input..
Thanks
Sindhu

Posted 6-Jan-14 20:18pm

sindhukrothapalli

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Kornfeld Eliyahu Peter · Accepted Answer · 2014-01-06T20:40:00

Solution 1

C#

Department dept = new Department();
dept.deptId = 1;
dept.deptName = "IT";
list.Add(dept);
dept = new Department();
dept.deptId = 2;
dept.deptName = "HR";
list.Add(dept);

After these lines dept has values 2 and 'HR'!
And later you use dept and not the what you stored in the array!

C#

emp.Department = dept;

So bot employee works at the same department!

Posted 6-Jan-14 20:40pm

Kornfeld Eliyahu Peter

Comments

sindhukrothapalli 7-Jan-14 2:45am

Hi Kornfeld Eliyahu Peter, For this what we have to do. Any Suggestion.. to get complete details of department.

Kornfeld Eliyahu Peter 7-Jan-14 2:48am

Try reorder you code.
1. create department 1
2. use department 1 on employee 1
3. create department 2
4. use department 2 on employee 2

sindhukrothapalli 7-Jan-14 2:57am

Thanks sir. Its Working.

Kornfeld Eliyahu Peter 7-Jan-14 3:10am

I know! :-)

Karthik_Mahalingam 7-Jan-14 3:14am

hi sindhu,
if your issue is resolved, pls mark this as answer and close this post...

sindhukrothapalli 7-Jan-14 4:31am

While using join condition we are facing this type error.Near Join- The type of one of the expression in the join clause is incorrect.Type inference failed in the call to 'GroupJoin'.

Near foreach-Cannot convert type 'Anonymous Type#1' to 'employee.Employee'.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;

namespace employee
{
public class Department
{
public int deptId { get; set; }
public string deptName { get; set; }
}
public class Employee
{
private employee.Department dept;

public Employee(employee.Department dept)
{
// TODO: Complete member initialization
this.dept = dept;
}
public int empId { get; set; }
public string empName { get; set; }
public int empSalary { get; set; }
public Department Department { get; set; }
}
class Program
{
static void Main(string[] args)
{
ArrayList list = new ArrayList();
Department dept = new Department();
dept.deptId = 1;
dept.deptName = "IT";
list.Add(dept);
ArrayList list1 = new ArrayList();
Employee emp = new Employee(dept);
emp.empId = 100;
emp.empName = "anusha";
emp.empSalary = 10000;
emp.Department = dept;
list1.Add(emp);
dept = new Department();
dept.deptId = 2;
dept.deptName = "HR";
list.Add(dept);
emp = new Employee(dept);
emp.empId = 101;
emp.empName = "usha";
emp.empSalary = 20000;
emp.Department = dept;
list1.Add(emp);
var query = from Employee employee in list1
where employee.empId == 101
select employee;
foreach(Employee e in query)
{
Console.WriteLine("EmpID\tEmpName\tEmpSal\tDepartmentID");
Console.WriteLine(e.empId+"\t"+e.empName +"\t"+e.empSalary+"\t"+e.Department.deptId+"");
}
var query1=(from Employee employee1 in list1
join Department department1 in list
on employee1.Department equals department1.deptId into o
from department1 in o.DefaultIfEmpty()
select new
{
id=employee1.empId,
name=employee1.empName,
salary=employee1.empSalary,
departmentname=department1.deptName
});
foreach (Employee e1 in query1)
{
Console.WriteLine("EmpID\tEmpName\tEmpSal\tDepartmentID");
Console.WriteLine(e1.empId + "\t" + e1.empName + "\t" + e1.empSalary + "\t" + e1.Department.deptName + "");
}
Console.ReadLine();
}
}
}

Karthik_Mahalingam 7-Jan-14 4:36am

post it in a new question, so that other will get notified.
now only Kornfeld Eliyahu Peter will get notified.

sindhukrothapalli 7-Jan-14 4:40am

ok

Kornfeld Eliyahu Peter 7-Jan-14 4:45am

KB right - I may have no the answer...