How to achieve real-time updating of WPF data binding?

There are several ways to achieve real-time updates in data binding in WPF.

1. Implement the INotifyPropertyChanged interface: Implement the INotifyPropertyChanged interface in the data class that needs real-time updates and call the PropertyChanged event in the property’s setter. This way, when the property value changes, the PropertyChanged event will be triggered, achieving real-time updates for bound data.

public class ViewModel : INotifyPropertyChanged
{
    private string _data;

    public string Data
    {
        get { return _data; }
        set
        {
            if (_data != value)
            {
                _data = value;
                OnPropertyChanged(nameof(Data));
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

1. Utilize Dependency Properties: Dependency properties are a special type of property that has an automatic notification mechanism, allowing for real-time updating of bound data. Define a dependency property on properties that require real-time updates, and call the PropertyChangedCallback method to update the property when it changes.

public class ViewModel : DependencyObject
{
    public static readonly DependencyProperty DataProperty =
        DependencyProperty.Register(nameof(Data), typeof(string), typeof(ViewModel), 
        new PropertyMetadata(null, OnDataPropertyChanged));

    public string Data
    {
        get { return (string)GetValue(DataProperty); }
        set { SetValue(DataProperty, value); }
    }

    private static void OnDataPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        // 更新数据
    }
}

1. When the bound data is a collection type, you can use ObservableCollection to achieve real-time updates. ObservableCollection is a special type of collection provided by WPF that automatically notifies the bound data view for updates.

public class ViewModel
{
    public ObservableCollection<string> DataCollection { get; set; }

    public ViewModel()
    {
        DataCollection = new ObservableCollection<string>();
    }
}

These are several commonly used methods to achieve real-time updating of WPF data binding. Depending on the specific scenario and requirements, you can choose an appropriate method for implementation.