/// <summary>
/// Handles the KeyPress event.
/// </summary>
protected override void OnKeyPress(KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar))
{
if (!ValidCharacters.Contains(e.KeyChar.ToString()))
{
e.Handled = true;
}
if (Plus == e.KeyChar.ToString() && (SelectionStart != 0 || Text.StartsWith(Plus) || Text.StartsWith(Minus)))
{
e.Handled = true;
}
if (Minus == e.KeyChar.ToString() && (SelectionStart != 0 || Text.StartsWith(Plus) || Text.StartsWith(Minus)))
{
e.Handled = true;
}
double value = 0;
string newText = GetNewText(e.KeyChar);
if (!string.IsNullOrEmpty(newText) && double.TryParse(newText, out value) &&
(value < Minimum || value > Maximum))
{
e.Handled = true;
}
}
// only allow one decimal separator
if (e.KeyChar.ToString() == DecimalSeparator && Text.Contains(DecimalSeparator))
{
e.Handled = true;
}
}
public static bool IsDnsNameValid(string dnsName)
{
if (dnsName.Length > MaximumLength)
{
return(false);
}
if (dnsName.Any(c => !ValidCharacters.Contains(c)))
{
return(false);
}
if (dnsName.First() == '-' || dnsName.Last() == '-')
{
return(false);
}
return(true);
}
private bool IsValid(char c)
{
return(ValidCharacters.Contains(c));
}