private void Form_KeyDown(object sender, KeyEventArgs e)
{
TimeSpan elapsedTime;
if (MyBarCodeFlag)
{
// Check how long it was since the bar code reading began.
elapsedTime = DateTime.Now.Subtract(MyBarCodeReadTime);
// If it was more than two secondes ago, it is probably a manual input
// and should not be regarded as a bar code reading.
if (elapsedTime.Seconds > BarCodeManager.GetMaxTimeToRead())
{
MyBarCodeFlag = false;
}
}
switch (e.KeyCode)
{
case Keys.D0:
case Keys.D1:
case Keys.D2:
case Keys.D3:
case Keys.D4:
case Keys.D5:
case Keys.D6:
case Keys.D7:
case Keys.D8:
case Keys.D9:
if (!MyBarCodeFlag)
{
// Start saving digits.
MyBarCodeFlag = true;
MyBarCodeReadTime = DateTime.Now;
MyBarCodeString = "";
}
// Add digit.
MyBarCodeString += e.KeyCode.ToString().Substring(1);
break;
case Keys.Enter:
if (MyBarCodeFlag)
{
// Fire bar code received event.
if (IsNotNull(BarCodeReceived))
{
BarCodeReceived(MyBarCodeString);
}
}
MyBarCodeFlag = false;
break;
default:
MyBarCodeFlag = false;
break;
}
}
public static IGenericContainer GetGenericContainerByBarCode(String barCode)
{
DataReader dataReader = null;
try
{
// Check arguments.
CheckNotEmpty(barCode, "barCode");
CheckLength(barCode, "barCode", BarCodeManager.GetBarCodeMaxLength());
// Get data from database.
dataReader = Database.GetGenericContainerByBarCode(barCode);
return(GetFirstGenericContainer(dataReader));
}
finally
{
CloseDataReader(dataReader);
}
}