WPF实现进度条实时更新效果

<Window x:Class="ProgressBar.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:ProgressBar"    mc:Ignorable="d"  <Grid>    <ProgressBar Name="progressBar" Minimum="1" Maximum="1000" Height="50"/>    <Button Content="Done" VerticalAlignment="Bottom" HorizontalAlignment="Center" FontSize="20" Margin="10" Click="Button_Click"/>  </Grid></Window>

using System;using System.Windows;using System.Windows.Controls.Primitives;using System.Windows.Threading; namespace ProgressBar{  /// <summary>  /// MainWindow.xaml 的交互逻辑  /// </summary>  public partial class MainWindow : Window  {    public MainWindow()    {      InitializeComponent();    }     private delegate void UpdateProgressBarDelegate(DependencyProperty dp, object value);     private void Button_Click(object sender, RoutedEventArgs e)    {      UpdateProgressBarDelegate updateProgressBaDelegate = new UpdateProgressBarDelegate(progressBar.SetValue);      for (int i = (int)progressBar.Minimum; i <= (int)progressBar.Maximum; i++)      {        Dispatcher.Invoke(updateProgressBaDelegate, DispatcherPriority.Background, new object[] { RangeBase.ValueProperty, Convert.ToDouble(i) });      }    }  }}