Filter argument as collection

Question

Hi, I'm trying to create a query on the Data Modeler in Flash Builder to retrieve some elements from an entity in this case is Client which have a clientId, basically I'm creating a filter with this query: jpql:Select c from Client as c Where c.clientId in (:IDs) but I don't know how to specify that the IDs query argument is going to be a collection, array or something like that, I tried using IDs as a string and passing the formated string like this 1,2,3 but it gives me a Cast error. Any thoughts on how to handle this?

Answer 1

You could store a list of all countries (and the same for sectors) that are currently checked in a field and then filter based on all items in this list. Handle the Checked and Unchecked events (or the corresponding events for the TreeView) for
the ComboBox to add and remove items from the collection respectively. Something like this:
private readonly List<string> _selectedCountries = new List<string>();
private void CheckBox_Checked(object sender, RoutedEventArgs e)
CheckBox chk = sender as CheckBox;
CountriesClass slc = chk.DataContext as CountriesClass;
if (slc != null)
string slc_value = slc.CountryName;
if (!_selectedCountries.Contains(slc_value))
_selectedCountries.Add(slc_value);
myPeopleIndex = new ObservableCollection<PeopleClass>(myPeopleIndex.Where(r => _selectedCountries.Contains(r.Name)).OrderBy(r=>r.Name));
ViewResult.ItemsSource = myPeopleIndex;
private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
CheckBox chk = sender as CheckBox;
CountriesClass slc = chk.DataContext as CountriesClass;
if (slc != null)
string slc_value = slc.CountryName;
if (_selectedCountries.Contains(slc_value))
_selectedCountries.Remove(slc_value);
myPeopleIndex = new ObservableCollection<PeopleClass>(myPeopleIndex.Where(r => _selectedCountries.Contains(r.Name)).OrderBy(r => r.Name));
ViewResult.ItemsSource = myPeopleIndex;
Hope that helps.
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