public bool StartScan(ScanSettings settings, object extTag)
{
bool scanning = false;
try
{
_extTag = extTag;
_messageHook.UseFilter = true;
scanning = DataSource.Open(settings);
return(scanning);
}
catch (TwainException e)
{
DataSource.Close();
EndingScan();
throw e;
}
finally
{
// Remove the message hook if scan setup failed
if (!scanning)
{
EndingScan();
}
}
}
/// <summary>
/// 做open→設定各種CAPABILITY→EnableDS→等回傳圖→end
/// </summary>
/// <param name="settings"></param>
public void StartScan(ScanSettings settings)
{
bool scanning = false;
try
{
_messageHook.UseFilter = true;
scanning = DataSource.Open(settings, UseIncrementalMemoryXfer);
}
catch (TwainException e)
{
DataSource.Close();
EndingScan();
throw e;
}
finally
{
// Remove the message hook if scan setup failed
if (!scanning)
{
EndingScan();
}
}
}