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BindableBase class for implementing INotifyPropertyChanged using C# 6 features while targeting .NET 2.0 to .NET 4.0. Make sure to use the nameof() operator for passing the propertyName parameter.
using System.ComponentModel;
/// <summary>
/// Implementation of <see cref="INotifyPropertyChanged" /> to simplify models.
/// </summary>
public abstract class BindableBase : INotifyPropertyChanged
{
/// <summary>
/// Multicast event for property change notifications.
/// </summary>
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Checks if a property already matches a desired value. Sets the property and
/// notifies listeners only when necessary.
/// </summary>
/// <typeparam name="T">Type of the property.</typeparam>
/// <param name="storage">Reference to a property with both getter and setter.</param>
/// <param name="value">Desired value for the property.</param>
/// <param name="propertyName">Name of the property used to notify listeners.</param>
/// <returns>
/// True if the value was changed, false if the existing value matched the
/// desired value.
/// </returns>
protected bool SetProperty<T>(ref T storage, T value, string propertyName)
{
if (Equals(storage, value))
{
return false;
}
storage = value;
this.OnPropertyChanged(propertyName);
return true;
}
/// <summary>
/// Notifies listeners that a property value has changed.
/// </summary>
/// <param name="propertyName">Name of the property used to notify listeners./>.
/// </param>
protected void OnPropertyChanged(string propertyName)
{
this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
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