So I am using external API which is providing class called CatInfoType which have for example int number catid and string catname.
I have a combobox with properties
< ComboBox x:Name="listOfCategories_comboBox" ... SelectionChanged="listOfCategories_comboBox_SelectionChanged" DisplayMemberPath="catname" />
Then in MainWindow cs file I have:
1) list of this class
List<CatInfoType> displayedCategories_List = new List<CatInfoType>();
2) in constructor
var comboBox = listOfCategories_comboBox as ComboBox;
comboBox.ItemsSource = displayedCategories_List;
3) after some button is clicked then I am filling values of combobox:
foreach (var item in allCategories_list)
{
if (item.catparent == 0)
{
displayedCategories_List.Add(item);
}
}
Until now everything is fine, but I would like to change combobox items after same comboBoxSelectionChanged is called:
private void listOfCategories_comboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
CatInfoType selectedCategory = listOfCategories_comboBox.SelectedItem as CatInfoType;
int selectedCategoryId = selectedCategory.catid;
int selectedCategoryParentId = selectedCategory.catparent;
displayedCategories_List.Clear();
foreach (var item in allCategories_list)
{
if (item.catparent == selectedCategoryId)
displayedCategories_List.Add(item);
}
var comboBox = listOfCategories_comboBox as ComboBox; // I think those two lines are useless
comboBox.ItemsSource = displayedCategories_List;
}
However the combobox items are not getting changed. I was trying to do it in few ways. None of them get the result.
How I may do this ? Change comboBox Items "on live". After one of those item is pressed I want to clear the list and add new items to be displayed.
I hope code above and description is showing what I would like to do. In case you have questions feel free to ask.
