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* Setup (using the Visual Studio Form designer):
*
* Use the Same Form as in the sample above but change the CurrentTime
* type to provide Change notification for the Now property. This sample
* uses the PropertyChanged pattern. The label Text value will correctly
* update in this sample.
***********************************************************************/
public class CurrentTime
{
System.Windows.Forms.Timer _timer;
public CurrentTime()
{
/***************************************************************
* Use a timer to keep track of the current timer
***************************************************************/
_timer = new System.Windows.Forms.Timer();
/***************************************************************
* Update the time every second
***************************************************************/
_timer.Interval = 1000;
_timer.Tick += delegate { this.Now = DateTime.Now; };
_timer.Start();
}
/*******************************************************************
* Use a timer to keep track of the current time
*******************************************************************/
private DateTime _now = DateTime.Now;
/*******************************************************************
* Property Change Notification fired bound UI elements will
* update when this property changed
*
* This uses the PropertyChanged pattern
*******************************************************************/
public DateTime Now
{
get { return _now; }
private set
{
if (_now != value)
{
_now = value;
OnNowChanged(EventArgs.Empty);
}
}
}
/*******************************************************************
* Provide a PropertyChanged event
*******************************************************************/
public event EventHandler NowChanged;
protected virtual void OnNowChanged(EventArgs e)
{
if (null != NowChanged)
{
NowChanged(this, e);
}
}
}
| Simple Binding |
| Complex Binding |
| Using Simple Binding with a List |
| Sample: Simple Binding to a List (VS 2005) (VS Project: DataBinding Intro) |
| Type Conversion |
| Formatting |