static public bool PrintLabel(string aPrinterName, string LabelData, ref string statusInfo, ref string errMsg)
{
bool Ret = true;
errMsg = string.Empty;
if (LabelData != string.Empty)
{
string HexStarter = "<HEX>";
string HexEnder = "</HEX>";
if (LabelData.Contains(HexStarter))
{
// We have to print it as byte[], not string
// Convert to a set of byte[]'s
Collection <byte[]> PartsOfLabel = new Collection <byte[]>();
string currentLabelData = LabelData;
while (currentLabelData.Contains(HexStarter))
{
Int32 hexstart = currentLabelData.IndexOf(HexStarter);
Int32 hexend = currentLabelData.IndexOf(HexEnder);
string prestr = currentLabelData.Substring(0, hexstart);
string hexstr = currentLabelData.Substring(hexstart + HexStarter.Length, hexend - hexstart - HexEnder.Length + 1);
PartsOfLabel.Add(CswTools.StringToByteArray(prestr));
PartsOfLabel.Add(Convert.FromBase64String(hexstr));
currentLabelData = currentLabelData.Substring(hexend + HexEnder.Length + 1);
}
PartsOfLabel.Add(CswTools.StringToByteArray(currentLabelData));
// Concatenate all parts into a single byte[]
Int32 newLen = 0;
foreach (byte[] part in PartsOfLabel)
{
newLen += part.Length;
}
byte[] entireLabel = new byte[newLen];
Int32 currentOffset = 0;
foreach (byte[] part in PartsOfLabel)
{
System.Buffer.BlockCopy(part, 0, entireLabel, currentOffset, part.Length);
currentOffset += part.Length;
}
//unmanaged code pointer required for the function call
IntPtr unmanagedPointer = Marshal.AllocHGlobal(entireLabel.Length);
try
{
Marshal.Copy(entireLabel, 0, unmanagedPointer, entireLabel.Length);
// Call unmanaged code
if (RawPrinterHelper.SendBytesToPrinter(aPrinterName, unmanagedPointer, entireLabel.Length))
{
statusInfo = "Printed " + statusInfo;
}
else
{
Ret = false;
errMsg = "Label printing error on client.";
statusInfo = "Error printing " + statusInfo;
}
}
finally
{
//unmanaged pointer must be explicitly released to prevent memory leak
Marshal.FreeHGlobal(unmanagedPointer);
}
}
else
{
if (RawPrinterHelper.SendStringToPrinter(aPrinterName, LabelData))
{
statusInfo = "Printed " + statusInfo;
}
else
{
Ret = false;
errMsg = "Label printing error on client.";
statusInfo = "Error printing " + statusInfo;
}
}
} // if( LabelData != string.Empty )
else
{
statusInfo = "No label content.";
}
return(Ret);
} // _printLabel()
