WPF中的绑定杂记

最新推荐文章于 2021-09-30 11:38:12 发布

原创最新推荐文章于 2021-09-30 11:38:12 发布 · 359 阅读

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本文介绍了一个使用WPF实现的双向绑定案例，通过自定义数据类`MyData`实现了属性改变通知机制，并将其绑定到UI元素上，展示了如何在主线程外更新UI并保持数据同步。

效果：绑定源对象字符串属性变化触发绑定目标UI Text属性变化

用到的知识点:

如何建立绑定

单向双向绑定

绑定源触发目标的属性变化

/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
MyData myDataObject = new MyData(DateTime.Now);
Binding myBinding = new Binding("MyDataProperty");
myBinding.Source = myDataObject;
myBinding.Mode = BindingMode.TwoWay;
myBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
myText.SetBinding(TextBlock.TextProperty, myBinding);

}
}

public class MyData : INotifyPropertyChanged

{
public MyData(DateTime dt)
{
new Thread(new ThreadStart(delegate
{
Thread.Sleep(5 * 1000);
for (int i = 0; i < 1000; i++)
{
MyDataProperty = i.ToString();
Thread.Sleep(100);
}
})) { IsBackground = true }.Start();
}
private String myDataProperty = "sb";
public String MyDataProperty
{
get { return myDataProperty; }
set
{
myDataProperty = value;
PropertyChanged.Invoke(this, new PropertyChangedEventArgs("MyDataProperty"));
}
}

#region INotifyPropertyChanged 成员

public event PropertyChangedEventHandler PropertyChanged;

#endregion
}