/// <summary>
/// Prepare available Education Levels
/// </summary>
/// <param name="items">Education Levels items</param>
/// <param name="withSpecialDefaultItem">Whether to insert the first special item for the default value</param>
/// <param name="defaultItemText">Default item text; pass null to use default value of the default item text</param>
public virtual void PrepareEducationLevels(IList <SelectListItem> items, bool withSpecialDefaultItem = true, string defaultItemText = null)
{
if (items == null)
{
throw new ArgumentNullException(nameof(items));
}
//prepare available education levels
var availableEducationLevels = _educationLevelService.GetAllEducationLevels();
foreach (var educationLevel in availableEducationLevels)
{
items.Add(new SelectListItem {
Value = educationLevel.Id.ToString(), Text = educationLevel.Name
});
}
//insert special item for the default value
PrepareDefaultItem(items, withSpecialDefaultItem, defaultItemText ?? "ระบุระดับการศึกษา");
}