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