private void txtRangoAl_TextChanged(object sender, TextChangedEventArgs e)
{
try
{
if (Validacion.IsValidCodPapeleta(txtRangoAl.Text) || (txtRangoAl.Text) == "")
{
lblErrRango2.Content = "El Codigo de Papeleta no es Valido";
}
else
{
lblErrRango2.Content = "";
if (this.txtRangoDel.Text != "" && this.txtRangoAl.Text != "")
{
this.lblCantidad.Content = (int.Parse(this.txtRangoAl.Text) - int.Parse(this.txtRangoDel.Text) + 1).ToString();
}
}
}
catch (Exception ex)
{
this.lblCantidad.Content = "No numerico";
}
}