[C#] Validation class for events?

[gicio]

Hi,

I develop an application that have 20 windows forms with many TextBoxes.
All TextBoxes have the same validation...
I write in all classes the same validation like that:



[code:1:220f0be2ce]
//if the user press a key down at txtDisplacement we check which one was pressed down
#region KeyDownInTxtDisplacement code
private void KeyDownInTxtDisplacement(object sender, System.Windows.Forms.KeyEventArgs e)
{
CheckWhichKeyDown(e);
}
#endregion



//if the user press a key down at txtModel we check which one was pressed down
#region KeyDownInTxtModel code
private void KeyDownInTxtModel(object sender, System.Windows.Forms.KeyEventArgs e)
{
CheckWhichKeyDown(e);
}
#endregion



//we check which key is pressed
//if key Enter or Return or Tab is pressed
//we go throw DoWhenOneTextBoxIsMarkedRed()
#region CheckWhichKeyDown code
private void CheckWhichKeyDown(System.Windows.Forms.KeyEven tArgs e)
{
if(e.KeyCode==Keys.Enter || e.KeyCode==Keys.Return || e.KeyCode==Keys.Tab)
{
ValidateThis();
}
}
#endregion



//when special key is press we enable the button
#region ValidateThis code
private void ValidateThis()
{
cmdAddToDataBase.Enabled = true;
}
#endregion
[/code:1:220f0be2ce]




CheckWhichKeyDown and ValidateThis should be in one validation class.
How I can write a validation class that validate ALL TextBoxes from all classes.
Any ideas?
Or do you know some sample validation classes available on www?


gicio