Combo-Box

[JLBLU]

Hi Ahmad

I want a combo-box to display "Lundi" / "Mardi" (display values) but want to store "MONDAY" / "TUESDAY" (internal values) in my data source (column="ScheduleId").

For this, I have following class to handle my enumeration :

public class DkAlarmSchedule
{
    public const string MONDAY      = "MONDAY";
    public const string TUESDAY     = "TUESDAY";

    public const string DISPLAY_MONDAY      = "Lundi";
    public const string DISPLAY_TUESDAY     = "Mardi";

    public string ScheduleId    { get; set; }
    public string ScheduleName  { get; set; }

    private static readonly List<DkAlarmSchedule> alarmSchedules = new List<DkAlarmSchedule>();
    public static IEnumerable<DkAlarmSchedule>    AlarmSchedules { get { return alarmSchedules; } }

    public DkAlarmSchedule(string id, string name)
    {
        ScheduleId   = id;
        ScheduleName = name;
    }

    public static void SetAlarmSchedules()
    {
        alarmSchedules.Clear();
        alarmSchedules.Add(new DkAlarmSchedule(MONDAY       , DISPLAY_MONDAY));
        alarmSchedules.Add(new DkAlarmSchedule(TUESDAY      , DISPLAY_TUESDAY));
    }

    public static IEnumerable<DkAlarmSchedule> GetAlarmSchedules()
    {
        return AlarmSchedules;
    }

    public static List<DkAlarmSchedule> GetAlarmSchedulesList()
    {
        return alarmSchedules;
    }

    public static string GetNameFromId( string scheduleId )
    {
        return alarmSchedules.FirstOrDefault(rec => rec.ScheduleId.Equals(scheduleId)).ScheduleName;
    }

}

// At beginning of my application :

         DkAlarmSchedule.SetAlarmSchedules();

// So, If in my data source, I have stored "MONDAY' in comumn "ScheduleId", I want to see displayed value = 'Lundi"

// In my view XAML, I wanted to do :
<controlsTV:TableViewComboBoxColumn
x:Name="colSched"
Header="Planning"
Width="Auto"
ItemsSource="{x:Bind mod:DkAlarmSchedule.GetAlarmSchedules()}"
Binding="{Binding ScheduleId}"
DisplayMemberPath="ScheduleName"
/>

But, by doing this, displayed value is "MONDAY" (and not "Lundi") after view populate (OnNavigatedTo)

// To have a correct value displayed after load of my data source, I have to do :

1/ added a new attribute "ScheduleName" in my ViewModel

    public string ScheduleName
    {
        get { return DkAlarmSchedule.GetNameFromId(ScheduleId); }
    }

    public string ScheduleId
    {
        get { return this._modelObject.ScheduleId; }
        set
        {
            this._modelObject.ScheduleId = value;
            SetErrorMessage();
            OnPropertyChanged();
            OnPropertyChanged("ScheduleName");
        }
    }

2/ modify xaml like this :
<controlsTV:TableViewComboBoxColumn
x:Name="colSched"
Header="Planning"
Width="Auto"
ItemsSource="{x:Bind mod:DkAlarmSchedule.GetAlarmSchedules()}"
Binding="{Binding ScheduleName}"
DisplayMemberPath="ScheduleName"
SelectedValuePath="ScheduleId"
SelectedValueBinding="{Binding ScheduleId, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
/>

// I works, but not very nice. Is there a way to do it differently ?

best regards
Jean-Luc