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using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
namespace MyComponentModel
{
public abstract class NotifyProperyChangedBase : INotifyPropertyChanged
{
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
#endregion
#region methods
protected bool CheckPropertyChanged<T>(string propertyName, ref T oldValue, ref T newValue)
{
if (oldValue == null && newValue == null)
{
return false;
}
if ((oldValue == null && newValue != null) || !oldValue.Equals((T)newValue))
{
oldValue = newValue;
FirePropertyChanged(propertyName);
return true;
}
return false;
}
protected void FirePropertyChanged(string propertyName)
{
if (this.PropertyChanged != null)
{
this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
}
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