private void _btnAcquirePage_Click(object sender, EventArgs e)
{
if (scannedImage != null)
{
scannedImage.Dispose();
scannedImage = null;
}
try
{
Messager.Show(this, "For best results, scan at 150DPI (or higher) and 1 bits per pixel", MessageBoxIcon.Information, MessageBoxButtons.OK);
StartupTwain();
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, twainSession.SelectedSourceName()))
{
return;
}
if (twainSession.SelectSource(String.Empty) == DialogResult.OK)
{
twainSession.Acquire(TwainUserInterfaceFlags.Show);
}
if (twainSession != null)
{
twainSession.Shutdown();
}
}
catch (Exception exp)
{
Messager.ShowError(this, exp);
}
}
private void Acquire(bool cleanup)
{
try
{
SetTransferMode();
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twainSession.SelectedSourceName()))
{
return;
}
_cleanupAfterAcquire = cleanup;
if (_cleanupAfterAcquire)
{
ShowCleanUpMessage();
}
// Acquire one or more images from a TWAIN source.
_twainSession.Acquire(TwainUserInterfaceFlags.Show | TwainUserInterfaceFlags.Modal);
}
catch (Exception ex)
{
AddErrorToErrorList(ex.Message);
MessageBox.Show(this, ex.Message);
}
}
public void LoadImageScanner()
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, twainSession.SelectedSourceName()))
{
return;
}
bool showUI = false;
inTwainAcquire = true;
//Set the scanner to scan a specified number of pages, scan at 1bpp B/W, and at 300DPI
try
{
twainSession.MaximumTransferCount = 1;
twainSession.Resolution = new SizeF(300, 300);
}
catch
{
MessageBox.Show("Unable to set scanner to 300DPI.");
showUI = true;
}
if (showUI)
{
twainSession.Acquire(TwainUserInterfaceFlags.Modal);
}
else
{
twainSession.Acquire(TwainUserInterfaceFlags.None);
}
inTwainAcquire = false;
}
private void _menuItemFileAcuire_Click(object sender, EventArgs e)
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twnSession.SelectedSourceName()))
{
return;
}
if (Directory.Exists(_twainSaveFilePath))
{
using (WaitCursor cursor = new WaitCursor())
{
try
{
if (_viewer.Image != null)
{
_viewer.Image.Dispose();
}
_twainSaveFileName = ChangeSaveFileName(_saveFilesCount.ToString());
//Call the Acquire method to start the scanning process
if (_twnSession.Acquire(TwainUserInterfaceFlags.Show) != DialogResult.OK)
{
Messager.ShowError(this, "Error Acquiring From Source");
}
else
{
_saveFilesCount++;
_twainSaveFileName = ChangeSaveFileName(_saveFilesCount.ToString());
}
}
catch (Exception ex)
{
Messager.ShowError(this, ex.Message);
}
finally
{
UpdateControls();
UpdateStatusBarText();
}
}
}
else
{
Messager.ShowError(this, "Set Results Path please.");
}
}
private void Acquire(bool cleanup)
{
try
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twainSession.SelectedSourceName()))
{
return;
}
_cleanupAfterAcquire = cleanup;
if (_cleanupAfterAcquire)
{
ShowCleanUpMessage();
}
_twainSession.Acquire(TwainUserInterfaceFlags.Show | TwainUserInterfaceFlags.Modal);
}
catch (Exception ex)
{
Messager.ShowError(this, ex);
}
}
private void Acquire(bool cleanup)
{
try
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twainSession.SelectedSourceName()))
{
return;
}
// get the output file name and file format
RasterSaveDialog dlg = new RasterSaveDialog(_codecs);
dlg.Title = "File Acquire Path";
dlg.AutoProcess = false;
dlg.EnableSizing = true;
dlg.FileFormatsList = new RasterSaveDialogFileFormatsList(RasterDialogFileFormatDataContent.Default);
dlg.ShowFileOptionsBasicJ2kOptions = false;
dlg.ShowFileOptionsJ2kOptions = false;
dlg.ShowFileOptionsMultipage = false;
dlg.ShowFileOptionsProgressive = false;
dlg.ShowFileOptionsQualityFactor = false;
dlg.ShowFileOptionsStamp = false;
dlg.ShowHelp = false;
dlg.ShowOptions = false;
dlg.ShowQualityFactor = false;
if (dlg.ShowDialog(this) == DialogResult.OK)
{
// save the output file name
_fileName = dlg.FileName;
// save the output file format
_fileFormat = dlg.Format;
_bitsPerPixel = dlg.BitsPerPixel;
string pathName = Path.GetDirectoryName(_fileName);
if (Directory.Exists(pathName))
{
// initialize the page counter
_pageNo = 0;
// Add the Acquire page event.
_twainSession.AcquirePage += new EventHandler <TwainAcquirePageEventArgs>(_twain_AcquirePage);
// Acquire pages
_cleanupAfterAcquire = cleanup;
if (_cleanupAfterAcquire)
{
ShowCleanUpMessage();
}
_twainSession.Acquire(TwainUserInterfaceFlags.Show);
// Remove the Acquire page event.
_twainSession.AcquirePage -= new EventHandler <TwainAcquirePageEventArgs>(_twain_AcquirePage);
}
else
{
Messager.ShowError(this, "Invalid File Name");
}
}
}
catch (Exception ex)
{
Messager.ShowError(this, ex);
}
finally
{
UpdateMyControls();
UpdateStatusBarText();
}
}
private void DoWork()
{
if (!DemosGlobal.CheckKnown3rdPartyTwainIssues(this, _twainSession.SelectedSourceName()))
{
_canceled = true;
DialogResult = DialogResult.Cancel;
return;
}
// Create an OCR document
// Acquire the page(s)
// Deskew the page
// Add the pages to the engine
// Recognize
// Save to final document
_lblProcessing.Text = "Acquiring a page...";
_canceled = false;
_twainSession.AcquirePage += new EventHandler <TwainAcquirePageEventArgs>(_twainSession_AcquirePage);
try
{
if (!_canceled)
{
DialogResult res = _twainSession.Acquire(TwainUserInterfaceFlags.Show);
if (res != DialogResult.OK && _document.Pages.Count <= 0)
{
_canceled = true;
}
}
if (_document.Pages.Count > 0)
{
// We have the pages in the OCR engine, recognize them
if (!_canceled)
{
_document.Pages.Recognize(new OcrProgressCallback(OcrProgress));
}
if (!_canceled)
{
_document.Save(_documentFileName, _format, new OcrProgressCallback(OcrProgress));
}
// Show the final document
if (!_canceled && File.Exists(_documentFileName))
{
Process.Start(_documentFileName);
}
}
}
catch (Exception ex)
{
ShowError(ex);
}
finally
{
// Unhook from the twain events
_twainSession.AcquirePage -= new EventHandler <TwainAcquirePageEventArgs>(_twainSession_AcquirePage);
// Remove all the pages from the document
_document.Pages.Clear();
_document.Dispose();
if (!_canceled)
{
DialogResult = DialogResult.OK;
}
else
{
DialogResult = DialogResult.Cancel;
}
}
}