In my sample code, the SpecialTextBox control overrides the TextBox control, and allows only these keys:
Space, 0-9, Enter.
SpecialTextBox overrides these 3 methods:
OnKeyDown, OnKeyUp and OnKeyPress.
Here is a piece of code to see how it works:
protected override void OnKeyUp(KeyEventArgs e)
{
if (e.KeyCode == Keys.Space ||
e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9 ||
e.KeyCode == Keys.Enter)
{
base.OnKeyUp(e);
}
else
{
e.Handled = true;
}
}
When you want to import this control to your project with the source code, don't forget the DesignTimeAttributes.xmta, which allows the designer support for this control:
3 <Class Name="MyControls.SpecialTextBox">
4 <DesktopCompatible>trueDesktopCompatible>
5 <Class>
Sorce Code:
http://www.winmobile.euweb.cz/#Post06
