Generic foreach loop for different property

Question

I am trying to use a generic method for foreach loop which would pass different parameter as the argument.

In this example below I would like to pass different parameters(EmployeeDisplayOrder or EmployeeEnrollOrder)

public void SaveEmployeeDisplayOrder(ICollection<Employee> employees)
{
   //some code

   foreach( var emp in employees)
   {
      UpdateSpecificEmployeeOrder(employee.id, e => e.EmployeeDisplayOrder);
   }
}

public void SaveEmployeeEnrollOrder(ICollection<Employee> employees)
{
   //some code

   foreach( var emp in employees)
   {
     UpdateSpecificEmployeeOrder(employee.id, e => e.EmployeeEnrollOrder);
   }
}

I would like to have something like this

public void UpdateEmployeeOrders(ICollection<Employee> employee)
{ 
  foreach( var emp in employees)
  {
    UpdateSpecificEmployeeOrder(employee.id, //generic property);
  }
}

and call this UpdateEmployeeOrders generic method from SaveEmployeeDisplayOrder and SaveEmployeeEnrollOrder.

Method signature for UpdateSpecificEmployeeOrder

UpdateSpecificEmployeeOrder( int employeeid, params Expression<Func<Employee, object>>[] property)

Is this possible?

Answer 1

You have the answer in your answer... you're using lambdas... so pass a delegate in your method.

public void SaveEmployeeDisplayOrder<T>(ICollection<Employee> employees, Func<Employee, T> fetchProperty)
{
   //some code

   foreach( var employee in employees)
   {
      UpdateSpecificEmployeeOrder(employee.id, fetchProperty(employee));
   }
}

Then you would call it similar to what you had:

SaveEmployeeDisplayOrder(employees, e => e.EmployeeDisplayOrder);

or

SaveEmployeeDisplayOrder(employees, e => e.EmployeeEnrollOrder);