如何按顺序将项插入现有ListView？ （UWP）

Question

我有一个绑定到ObservableCollection的ListView（作为ItemsSource）。它基本上是按字母顺序排列的字符串名称列表。

我想知道如何将单个项目（字符串）插入到集合中并自动排序，而不必使用整个列表。

另外，有没有办法在执行这样的任务时保持当前的ListViewItem？感谢。

Answer 1

也许你想要AdvancedCollectionView

  

AdvancedCollectionView是一个集合视图实现   支持过滤，排序和增量加载。它的意思是   用于viewmodel。

using Microsoft.Toolkit.Uwp.UI;

// Grab a sample type
public class Person
{
    public string Name { get; set; }
}

// Set up the original list with a few sample items
var oc = new ObservableCollection<Person>
{
    new Person { Name = "Staff" },
    new Person { Name = "42" },
    new Person { Name = "Swan" },
    new Person { Name = "Orchid" },
    ...
};

// Set up the AdvancedCollectionView with live shaping enabled to filter and sort the original list
var acv = new AdvancedCollectionView(oc, true);

// Let's filter out the integers
int nul;
acv.Filter = x => !int.TryParse(((Person)x).Name, out nul);

// And sort ascending by the property "Name"
acv.SortDescriptions.Add(new SortDescription("Name", SortDirection.Ascending));

// Let's add a Person to the observable collection
var person = new Person { Name = "Aardvark" };
oc.Add(person);

// Our added person is now at the top of the list, but if we rename this person, we can trigger a re-sort
person.Name = "Zaphod"; // Now a re-sort is triggered and person will be last in the list

// AdvancedCollectionView can be bound to anything that uses collections. 
YourListView.ItemsSource = acv;