private string Get_PDIScan_Error_Details(pdiscan_errors pdiscan_error)
{
try
{
string error_string = string.Empty;
IntPtr short_description = Marshal.AllocHGlobal(256);
IntPtr long_description = Marshal.AllocHGlobal(256);
IntPtr extra_info = Marshal.AllocHGlobal(256);
if (pdiscan_error != pdiscan_errors.PDISCAN_ERR_NONE)
{
PdiScanWrap.PdGetErrorShortDescription(scanning_handle, pdiscan_error, short_description);
PdiScanWrap.PdGetErrorLongDescription(scanning_handle, pdiscan_error, long_description);
PdiScanWrap.PdGetErrorExtraInfo(scanning_handle, extra_info);
error_string = "Error Number: " + ((int)pdiscan_error).ToString() + "\n"
+ "Short Description: " + Marshal.PtrToStringAnsi(short_description) + "\n"
+ "Long Description: " + Marshal.PtrToStringAnsi(long_description) + "\n"
+ "Extra Info: " + Marshal.PtrToStringAnsi(extra_info) + "\n";
}
Marshal.FreeHGlobal(short_description);
Marshal.FreeHGlobal(long_description);
Marshal.FreeHGlobal(extra_info);
return(error_string);
}
catch (Exception ex)
{
Common.Utils.LogManager.Error("Get_PDIScan_Error_Details exception: " + ex.ToString());
return(string.Empty);
}
}
private void imprinter_string_callback(int PageNumber, IntPtr ImprinterString, IntPtr UserData)
{
try
{
Common.Utils.LogManager.Info("imprinter_string_callback");
IntPtr impstr = Marshal.StringToHGlobalAnsi("imprinttest we do\n word wrap");
PD_IMPRINT_SETUP setup = new PD_IMPRINT_SETUP();
setup.eBase = pd_imprinter_horizontal_offset_bases.PD_IMPRINTER_HORIZONTAL_OFFSET_BASE_LEADING_EDGE;
setup.eDirection = pd_imprint_directions.PD_IMPRINT_DIRECTION_FORWARD;
setup.eTextOrientation = pd_imprinter_text_orientations.PD_IMPRINTER_TEXT_ORIENTATION_90;
setup.iOffset = 0;
pdiscan_errors pdiscan_error = PdiScanWrap.PdImprintDocument(scanning_handle, pd_imprint_types.PD_IMPRINT_TYPE_TEXT, impstr, ref setup);
}
catch (Exception ex)
{
Common.Utils.LogManager.Error("imprinter_string_callback exception: " + ex.ToString());
}
}
public bool Disconnect()
{
try
{
if (scanner_connected)
{
pdiscan_errors pdiscan_error = PdiScanWrap.PdDisconnectFromScanner(scanning_handle); // this command will make document stuck
scanner_connected = false;
return(true);
}
return(false);
}
catch (Exception ex)
{
Common.Utils.LogManager.Error("Disconnect exception: " + ex.ToString());
return(false);
}
}
/// <summary>
///
/// </summary>
/// <param name="documentScannerCallback">DocumentScannerCallback(string frontPath, string error)</param>
public bool StartScanning(Action <string[], string> documentScannerCallback)
{
try
{
// If scanner is not initiated, run Connect() first
if (!scanner_connected)
{
if (!Connect())
{
Common.Utils.LogManager.Error("StartScanning.PdEnableFeeder failed");
return(false);
}
}
_documentScannerCallback = documentScannerCallback;
if (scanner_connected && !enablefeeder)
{
//MessageBox.Show("StartScanning");
pdiscan_errors pdiscan_error = PdiScanWrap.PdEnableFeeder(scanning_handle);
if (pdiscan_error != pdiscan_errors.PDISCAN_ERR_NONE)
{
display_pdiscan_error(pdiscan_error);
//MessageBox.Show("StartScanning.PdEnableFeeder failed");
return(false);
}
//MessageBox.Show("StartScanning.PdEnableFeeder OK");
enablefeeder = true;
return(true);
}
return(false);
}
catch (Exception ex)
{
Common.Utils.LogManager.Error("StartScanning exception: " + ex.ToString());
return(false);
}
}
public void display_pdiscan_error(pdiscan_errors pdiscan_error)
{
string error_string;
IntPtr short_description = Marshal.AllocHGlobal(256);
IntPtr long_description = Marshal.AllocHGlobal(256);
IntPtr extra_info = Marshal.AllocHGlobal(256);
if (pdiscan_error != pdiscan_errors.PDISCAN_ERR_NONE)
{
PdiScanWrap.PdGetErrorShortDescription(scanning_handle, pdiscan_error, short_description);
PdiScanWrap.PdGetErrorLongDescription(scanning_handle, pdiscan_error, long_description);
PdiScanWrap.PdGetErrorExtraInfo(scanning_handle, extra_info);
error_string = "Error Number: " + ((int)pdiscan_error).ToString() + "\n"
+ "Short Description: " + Marshal.PtrToStringAnsi(short_description) + "\n"
+ "Long Description: " + Marshal.PtrToStringAnsi(long_description) + "\n"
+ "Extra Info: " + Marshal.PtrToStringAnsi(extra_info) + "\n";
Common.Utils.LogManager.Error("display_pdiscan_error: " + error_string);
}
Marshal.FreeHGlobal(short_description);
Marshal.FreeHGlobal(long_description);
Marshal.FreeHGlobal(extra_info);
}
private void scanning_error_callback(pdiscan_errors ScanningError, string ExtraInfo, IntPtr UserData)
{
Common.Utils.LogManager.Error("scanning_error_callback: " + ExtraInfo);
}
//Callbacks occur on a different thread. In order to return to the main thread we must use delegates.
public void page_end_callback(int PageNumber, IntPtr FrontSideDIB, IntPtr BackSideDIB, ref int AbortRequested, IntPtr UserData)
{
try
{
if (_documentScannerCallback != null)
{
Debug.Assert(FrontSideDIB != IntPtr.Zero);
string curDir = Directory.GetCurrentDirectory();
// create directory
if (!Directory.Exists(curDir + "\\Temp"))
{
Directory.CreateDirectory(curDir + "\\Temp");
}
// set file path
string frontPath = string.Empty;
string backPath = string.Empty;
string error = string.Empty;
//Front
if (FrontSideDIB != IntPtr.Zero)
{
frontPath = curDir + "\\Temp\\document_front" + DateTime.Now.ToString("yyyyMMddHHmmssFFF") + ".jpg";
pdiscan_errors retval = PdiScanWrap.PdSaveImageToDisk(FrontSideDIB, frontPath);
if (retval == pdiscan_errors.PDISCAN_ERR_NONE)
{
// Scale image
Image image = Image.FromFile(frontPath);
Image newImage = Trinity.Common.CommonUtil.ScaleImage(image, 768, 1024);
image.Dispose();
newImage.Save(frontPath, ImageFormat.Jpeg);
newImage.Dispose();
}
else
{
error = Get_PDIScan_Error_Details(retval);
}
}
if (BackSideDIB != IntPtr.Zero)
{
//PdiScanWrap.PdSaveImageToDisk(BackSideDIB, curDir + "\\Temp\\document_back" + DateTime.Now.ToString("yyyyMMddHHmmssFFF") + ".jpg");
backPath = curDir + "\\Temp\\document_back" + DateTime.Now.ToString("yyyyMMddHHmmssFFF") + ".jpg";
pdiscan_errors retval = PdiScanWrap.PdSaveImageToDisk(BackSideDIB, backPath);
if (retval == pdiscan_errors.PDISCAN_ERR_NONE)
{
// Scale image
Image image = Image.FromFile(backPath);
Image newImage = Trinity.Common.CommonUtil.ScaleImage(image, 768, 1024);
image.Dispose();
newImage.Save(backPath, ImageFormat.Jpeg);
newImage.Dispose();
}
else
{
error = Get_PDIScan_Error_Details(retval);
}
}
// callback
_documentScannerCallback(new string[] { frontPath, backPath }, error);
}
}
catch (Exception ex)
{
Common.Utils.LogManager.Error("page_end_callback exception: " + ex.ToString());
// callback
_documentScannerCallback(new string[] {}, ex.Message);
_documentScannerCallback = null;
}
}
public static extern void PdGetErrorLongDescription(IntPtr ScanningHandle, pdiscan_errors ErrorCode, IntPtr LongDescription);
