WPF数据自动滚动的效果实现

<Window x:Class="ForTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:ForTest"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <ProgressBar Grid.Row="0" Name="progressBar" Height="50" Width="600"></ProgressBar>
        <Button Grid.Row="1" Height="30" Width="100" Click="Button_Click" Margin="0,0,0,60">开始</Button>
        <ScrollViewer Grid.Row="2">
            <ListBox Name="list" ItemsSource="{Binding Datas,UpdateSourceTrigger=PropertyChanged}">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding ElemId,UpdateSourceTrigger=PropertyChanged}"></TextBlock>
                    </DataTemplate>
                </ListBox.ItemTemplate>  
            </ListBox>
        </ScrollViewer>
    </Grid>
</Window>

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;
namespace ForTest
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        #region UI更新接口
        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName = null)
        {
            if (PropertyChanged != null)
                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        #endregion
        public ObservableCollection<ElementData> Datas { get; set; }
        public MainWindow()
        {
            Datas = new ObservableCollection<ElementData>();
            InitializeComponent();
            DataContext = this;
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            new Thread(()=>
            {
                for (int i = 0; i < 100; i++)
                {
                    ElementData elementData = new ElementData();
                    elementData.ElemId = DateTime.Now.ToLongTimeString();
                    System.Windows.Application.Current.Dispatcher.Invoke((Action)(() =>
                    {
                        Datas.Add(elementData);
                        scroll.ScrollToEnd();
                    }));
                    Thread.Sleep(300);
                }
            })
            { IsBackground = true }.Start();
        }
    }
    public class ElementData : INotifyPropertyChanged
    {
        #region UI更新接口
        public event PropertyChangedEventHandler PropertyChanged;
        protected virtual void OnPropertyChanged(string propertyName = null)
        {
            if (PropertyChanged != null)
                PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        #endregion
        #region 属性
        /// <summary>
        /// 元素ID
        /// </summary>
        private string elemId;
        public string ElemId
        {
            get { return elemId; }
            set
            {
                elemId = value;
                OnPropertyChanged("ElemId");
            }
        }
        #endregion
    }
}