private void RegisterEmployeeForm_Load(object sender, EventArgs e)
{
Employee employee = new Employee();
var q = employee.RetrieveEmployees().Select(x => new
{
Display = x.fullName + " - " + x.NIK,
Value = x
}).ToList();
comboBox1.DisplayMember = "Display";
comboBox1.ValueMember = "Value";
comboBox1.DataSource = q;
ContractType ct = new ContractType();
var q2 = ct.RetrieveContractTypes();
comboBox2.DisplayMember = "ContractTypeName";
comboBox2.DataSource = q2;
Branch b = new Branch();
var q3 = b.RetrieveBranches();
comboBox3.DisplayMember = "BranchName";
comboBox3.DataSource = q3;
Department d = new Department();
var q4 = d.RetrieveDepartments();
comboBox4.DisplayMember = "DepartmentName";
comboBox4.DataSource = q4;
Pos p = new Pos();
var q5 = p.RetrievePos();
comboBox5.DisplayMember = "PosName";
comboBox5.DataSource = q5;
Level l = new Level();
var q6 = l.RetrieveLevels();
comboBox6.DisplayMember = "LevelName";
comboBox6.DataSource = q6;
}