public class MyClass
{
public event EventHandler<PropertyChagedEventArgs> MyPropertyChanging;
public event EventHandler<PropertyChagedEventArgs> MyPropertyChanged;
private int _myProperty;
public int MyProperty
{
get { return _myProperty; }
set
{
if (value != _myProperty)
{
PropertyChagedEventArgs e
= new PropertyChagedEventArgs
("MyProperty", _myProperty,
value);//初始化 if (this.MyPropertyChanging != null)
{
this.MyPropertyChanging(this, e);
if (e.Cancel) return;
}
_myProperty = (int)e.NewValue;
if (this.MyPropertyChanged != null)
{
this.MyPropertyChanged(this, e);
}
}
}
}
}
/// <summary>
/// 通用的类
/// </summary>
public class PropertyChagedEventArgs : EventArgs
{
public PropertyChagedEventArgs(string propertyName,object oldValue,object newValue)
{
PropertyName = propertyName;
OldValue = oldValue;
NewValue = newValue;
}
public bool Cancel { get; set; }
public string PropertyName { get; private set; }
public object OldValue { get; private set; }
public object NewValue { get; set; }
}
//csharp/5975