异步方式向WPF ListBox控件中一条一条添加记录

向ListBox绑定数据源时,如果数据量过大,可能会使得程序卡死,这是就需要一条一条的向ListBox的数据源中添加记录了,下面是个小Demo:

1.前台代码,就是一个ListBox控件

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <ListBox x:Name="listBox"></ListBox>
    </Grid>
</Window>

2.后台代码,就是不断的向ListBox的绑定的数据源中添加记录,这里只是添加了一个描述数字,不断的调用委托添加数据,如果想停止添加数据时可以写停止条件。

using System.Collections.ObjectModel;
using System.Windows;
using System.Windows.Threading;

namespace WpfApplication1
{
    /// <summary>
    ///     MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private ObservableCollection<string> _numberDescriptions;

        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            _numberDescriptions = new ObservableCollection<string>();

            listBox.ItemsSource = _numberDescriptions;

            Dispatcher.BeginInvoke(DispatcherPriority.Background, new LoadNumberDelegate(LoadNumber), 1);
        }

        private void LoadNumber(int number)
        {
            _numberDescriptions.Add("Number " + number);
            Dispatcher.BeginInvoke(DispatcherPriority.Background, new LoadNumberDelegate(LoadNumber), ++number);
        }

        private delegate void LoadNumberDelegate(int number);
    }
}

3.效果图

posted @ 2013-12-27 17:52  CandyZkn  阅读(3956)  评论(0编辑  收藏  举报