private void _rdTransferFile_CheckedChanged(object sender, System.EventArgs e)
{
int format;
string fileName;
_transferMode = TwainTransferMode.File;
_cmbFileFormats.Enabled = true;
_btnBrowse.Enabled = true;
fileName = this._txtFileName.Text;
_btnOK.Enabled = (fileName != "");
// disable other options
_cbUseBufferSize.Enabled = false;
_txtBufferSize.Enabled = false;
_btnLEADFormats.Enabled = false;
try
{
TwainCapability twnCap = _session.GetCapability(TwainCapabilityType.ImageImageFileFormat, TwainGetCapabilityMode.GetValues);
switch (twnCap.Information.ContainerType)
{
case TwainContainerType.Enumeration:
{
_cmbFileFormats.Items.Clear();
int count = twnCap.EnumerationCapability.Count;
_format = new RasterImageFormat[count];
for (int i = 0; i < count; i++)
{
if (twnCap.EnumerationCapability.ItemType == TwainItemType.Uint16)
{
format = Convert.ToUInt16(twnCap.EnumerationCapability.GetValue(i));
AddScannerFormats(format, i);
}
}
break;
}
case TwainContainerType.OneValue:
{
_cmbFileFormats.Items.Clear();
if (twnCap.OneValueCapability.ItemType == TwainItemType.Uint16)
{
_format = new RasterImageFormat[1];
format = Convert.ToUInt16(twnCap.OneValueCapability.Value);
AddScannerFormats(format, 0);
}
break;
}
}
_cmbFileFormats.SelectedIndex = 0;
}
catch (Exception ex)
{
Messager.ShowError(this, ex);
}
}
public bool GetCap()
{
bool flag = true;
if (capId == TwCap.ICAP_XRESOLUTION || capId == TwCap.ICAP_YRESOLUTION)
{
flag = SetInch();
}
//if (capId == TwCap.ICAP_THRESHOLD)
//{
// flag = SetBitDepthReduction();
//}
if (flag)
{
if (capId == TwCap.ECAP_PAPERSOURCE)
{
GetPaperSource();
}
else
{
TwCapability cap = new TwCapability(capId);
if (twSession.GetCapability(ref cap))
{
IntPtr intPtr = cap.contentValuePtr;
switch (cap.contentType)
{
case TwOn.One:
GetCapFromOneValue(intPtr);
break;
case TwOn.Array:
GetCapFromArray(intPtr);
break;
case TwOn.Enum:
GetCapFromEnumeration(intPtr);
break;
case TwOn.Range:
GetCapFromRange(intPtr);
break;
default:
{
logger.Debug("the contentType in TwCapability is wrong");
flag = false;
}
break;
}
}
if (cap.contentValuePtr != null)
{
TwainSession.GlobalFree(cap.contentValuePtr);
}
}
}
return(flag);
}