WPF: ComboBox SelectedIndex = -1 ??
- by msfanboy
Hello,
I am using a MVVM Wizard with several pages. When I set a value in the combobox and go to the next page and switch back I want to reset the value I set before.
But all whats happening is that the combobox is empty at top and the index is -1 ?
What do I wrong?
<ComboBox ItemsSource="{Binding Path=LessonNumbers}" SelectedIndex="{Binding SelectedLessonNumber}" />
private ReadOnlyCollection<int> _lessonNumbers;
public ReadOnlyCollection<int> LessonNumbers
{
get
{
if (_lessonNumbers == null)
this.CreateLessonNumbers();
return _lessonNumbers;
}
}
private void CreateLessonNumbers()
{
var list = new List<int>();
for (int i = 1; i < 24; i++)
{
list.Add(i);
}
_lessonNumbers = new ReadOnlyCollection<int>(list);
}
private int _selectedLessonNumber;
public int SelectedLessonNumber
{
get { return _selectedLessonNumber; }
set
{
if (_selectedLessonNumber == value)
return;
_selectedLessonNumber = value;
this.OnPropertyChanged("SelectedLessonNumber");
}
}
