public FilterViewModel(string header, FilterIndexes filterIndex, IEnumerable <object> entities, Func <object, string> captionFunc)
: this(header, filterIndex)
{
if (entities == null)
{
throw new ArgumentNullException(nameof(entities), @"entities cannot be null.");
}
if (captionFunc == null)
{
throw new ArgumentNullException(nameof(captionFunc), @"captionFunc cannot be null.");
}
FilterItemVmCollection = new ObservableCollection <FilterItemViewModel>(
entities.Select(
e => {
var item = new FilterItemViewModel(e, captionFunc);
item.PropertyChanged += OnFilterItemPropertyChanged;
return(item);
})
);
foreach (var filterItem in FilterItemVmCollection)
{
filterItem.IsChecked = true;
}
}
public FilterViewModel(string header, FilterIndexes filterIndex, bool?isCheckedValue = null)
: this(header, filterIndex)
{
var trueItem = new FilterItemViewModel(true, TRUE_CAPTION);
trueItem.PropertyChanged += OnFilterItemPropertyChanged;
var falseItem = new FilterItemViewModel(false, FALSE_CAPTION);
falseItem.PropertyChanged += OnFilterItemPropertyChanged;
FilterItemVmCollection = new ObservableCollection <FilterItemViewModel>(new [] { trueItem, falseItem });
trueItem.IsChecked = isCheckedValue ?? true;
falseItem.IsChecked = !isCheckedValue ?? true;
}