private void appBarOkButton_Click(object sender, EventArgs e)
{
// Confirm there is some text in the text box.
if (newTaskNameTextBox.Text.Length > 0)
{
// Create a new to-do item.
ToDoItem newToDoItem = new ToDoItem
{
ItemName = newTaskNameTextBox.Text,
Category = (ToDoCategory)categoriesListPicker.SelectedItem
};
// Add the item to the ViewModel.
App.ViewModel.AddToDoItem(newToDoItem);
// Return to the main page.
if (NavigationService.CanGoBack)
{
NavigationService.GoBack();
}
}
}
public void DeleteToDoItem(ToDoItem toDoForDelete)
{
// Remove the to-do item from the "all" observable collection.
AllToDoItems.Remove(toDoForDelete);
// Remove the to-do item from the data context.
toDoDB.Items.DeleteOnSubmit(toDoForDelete);
// Remove the to-do item from the appropriate category.
switch (toDoForDelete.Category.Name)
{
case "Home":
HomeToDoItems.Remove(toDoForDelete);
break;
case "Work":
WorkToDoItems.Remove(toDoForDelete);
break;
case "Hobbies":
HobbiesToDoItems.Remove(toDoForDelete);
break;
default:
break;
}
// Save changes to the database.
toDoDB.SubmitChanges();
}
// Add a to-do item to the database and collections.
public void AddToDoItem(ToDoItem newToDoItem)
{
// Add a to-do item to the data context.
toDoDB.Items.InsertOnSubmit(newToDoItem);
// Save changes to the database.
toDoDB.SubmitChanges();
// Add a to-do item to the "all" observable collection.
AllToDoItems.Add(newToDoItem);
// Add a to-do item to the appropriate filtered collection.
switch (newToDoItem.Category.Name)
{
case "Home":
HomeToDoItems.Add(newToDoItem);
break;
case "Work":
WorkToDoItems.Add(newToDoItem);
break;
case "Hobbies":
HobbiesToDoItems.Add(newToDoItem);
break;
default:
break;
}
}
// Called during a remove operation
private void detach_ToDo(ToDoItem toDo)
{
NotifyPropertyChanging("ToDoItem");
toDo.Category = null;
}
// Called during an add operation
private void attach_ToDo(ToDoItem toDo)
{
NotifyPropertyChanging("ToDoItem");
toDo.Category = this;
}
// Called during a remove operation
private void detach_ToDo(ToDoItem toDo)
{
NotifyPropertyChanging("ToDoItem");
toDo.Category = null;
}
// Called during an add operation
private void attach_ToDo(ToDoItem toDo)
{
NotifyPropertyChanging("ToDoItem");
toDo.Category = this;
}
