Question

I have Class as defined below

class Employee
{
    public int EmpNo{get;set;}
    public string Name{get;set;}
    public string Designation{get;set;}
}

and I have a list of employees

List<Employee>

I can find a list of employees with similar designation, using FindAll() method.

But I want to have a list(or array) of EmpNo and not list of Employees. I can use a for loop to construct, but want a different answer using predicate. How can I do it? or is it not possible? I think had got a solution for similar problem earlier, but not getting it now.

May be Something like FindAll(…).ToArray().

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EDIT

Ok I got the answer.

FindAll(emp => emp.Designation.Equals("Executive")).Select(item => item.EmpNo).ToArray()

Answer 1

The alternative is;

employees
.Where(emp => emp.Designation.Equals("Executive"))
.Select(item => item.EmpNo).ToList()

There are slight performance differences between FindAll and Where, have a look at this;

FindAll vs Where extension-method