Created
May 5, 2016 10:55
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[C# UWP] A base class for all view models.
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/// <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. | |
/// This value is optional and can be provided automatically when invoked | |
/// from compilers that support CallerMemberName. | |
/// </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, [CallerMemberName] string propertyName = null) | |
{ | |
if (propertyName == null) throw new ArgumentNullException(nameof(propertyName)); | |
if (Equals(storage, value)) return false; | |
storage = value; | |
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); | |
return true; | |
} | |
} |
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