WPF ListView 虚拟化分组

使用WPF ListView 控件可以方便地展示大量数据，并通过虚拟化技术提高性能。其中，虚拟化分组是一种常用的技术，可以将数据按照特定的属性进行分组展示，提供更好的用户体验。本文将介绍WPF ListView 虚拟化分组的实现方式，并提供一个案例代码来演示其用法。

xaml
    
        
            
                
                    
                
            
        
    
    
        
            
            
        
    

csharp
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}
public class ViewModel
{
    public ICollectionView Data { get; set; }
    public ViewModel()
    {
        var persons = new List
        {
            new Person { Name = "Tom", Age = 20 },
            new Person { Name = "Jerry", Age = 22 },
            new Person { Name = "Alice", Age = 21 },
            new Person { Name = "Bob", Age = 20 },
            new Person { Name = "Eve", Age = 22 }
        };
        var collectionView = new CollectionViewSource { Source = persons };
        collectionView.GroupDescriptions.Add(new PropertyGroupDescription("Age"));
        Data = collectionView.View;
    }
}

xaml
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApp"
        Title="WPF ListView 虚拟化分组" Height="450" Width="800">
    
        
    
    
        
            
                
                    
                        
                            
                        
                    
                
            
            
                
                    
                    
                
            
        
    

csharp
using System.Collections.Generic;
using System.Windows;
using System.Windows.Data;
namespace WpfApp
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }
    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }
    public class ViewModel
    {
        public ICollectionView Data { get; set; }
        public ViewModel()
        {
            var persons = new List
            {
                new Person { Name = "Tom", Age = 20 },
                new Person { Name = "Jerry", Age = 22 },
                new Person { Name = "Alice", Age = 21 },
                new Person { Name = "Bob", Age = 20 },
                new Person { Name = "Eve", Age = 22 }
            };
            var collectionView = new CollectionViewSource { Source = persons };
            collectionView.GroupDescriptions.Add(new PropertyGroupDescription("Age"));
            Data = collectionView.View;
        }
    }
}