public void Close()
{
if (SourceId.Id != 0)
{
UserInterface userInterface = new UserInterface();
TwainResult result = Twain32Native.DsUserInterface(
_applicationId,
SourceId,
DataGroup.Control,
DataArgumentType.UserInterface,
Message.DisableDS,
userInterface);
if (result != TwainResult.Failure)
{
result = Twain32Native.DsmIdentity(
_applicationId,
IntPtr.Zero,
DataGroup.Control,
DataArgumentType.Identity,
Message.CloseDS,
SourceId);
}
}
}
public void Close()
{
if (SourceId.Id != 0)
{
try
{
UserInterface userInterface = new UserInterface();
TwainResult result = Twain32Native.DsUserInterface(
_applicationId,
SourceId,
DataGroup.Control,
DataArgumentType.UserInterface,
Message.DisableDS,
userInterface);
if (result != TwainResult.Failure)
{
result = Twain32Native.DsmIdentity(
_applicationId,
IntPtr.Zero,
DataGroup.Control,
DataArgumentType.Identity,
Message.CloseDS,
SourceId);
}
}
catch
{
// ignore this is bypass an error that if trigerd needs the whole twain classto be reinitialised
}
}
}
/// <summary>
/// 打開DS，進入State 4以溝通Capabilities
/// </summary>
/// <exception cref="DeviceOpenExcetion">當DS被其他人占用的時候可能會擲回，或twain DLL沒有錯誤，但是回傳值失敗的話就會擲回</exception>
public void OpenSource()
{
TwainResult result = TwainResult.NotDSEvent;
try
{
result = Twain32Native.DsmIdentity(
_applicationId,
IntPtr.Zero,
DataGroup.Control,
DataArgumentType.Identity,
Message.OpenDS,
SourceId);
}
catch (Exception ex)
{
throw new DeviceOpenExcetion(ex.Message);
}
if (result != TwainResult.Success)
{
throw new DeviceOpenExcetion("Error opening data source", result);
}
Logger.WriteLog(LOG_LEVEL.LL_NORMAL_LOG, string.Format("DataSource \"{0}\" successfully opened.", this.SourceId.ProductName));
}
public DataSourceManager(Identity applicationId, IWindowsMessageHook messageHook)
{
// Make a copy of the identity in case it gets modified
ApplicationId = applicationId.Clone();
ScanningComplete += delegate { };
TransferImage += delegate { };
_messageHook = messageHook;
_messageHook.FilterMessageCallback = FilterMessage;
IntPtr windowHandle = _messageHook.WindowHandle;
_eventMessage.EventPtr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(WindowsMessage)));
// Initialise the data source manager
TwainResult result = Twain32Native.DsmParent(
ApplicationId,
IntPtr.Zero,
DataGroup.Control,
DataArgumentType.Parent,
Message.OpenDSM,
ref windowHandle);
if (result == TwainResult.Success)
{
//according to the 2.0 spec (2-10) if (applicationId.SupportedGroups
// | DataGroup.Dsm2) > 0 then we should call DM_Entry(id, 0, DG_Control, DAT_Entrypoint, MSG_Get, wh)
//right here
DataSource = DataSource.GetDefault(ApplicationId, _messageHook);
}
else
{
throw new TwainException("Error initialising DSM: " + result, result);
}
}
public bool Disable()
{
if (SourceState != null && SourceState >= TwainState.SourceEnabled)
{
if (SourceId.Id != 0)
{
var userInterface = new UserInterface();
TwainResult result = Twain32Native.DsUserInterface(
_applicationId,
SourceId,
DataGroup.Control,
DataArgumentType.UserInterface,
Message.DisableDS,
userInterface);
if (result != TwainResult.Failure)
{
_log.Debug(string.Format("DisableDS, result: {0}", result));
SourceState = TwainState.SourceOpen;
return(true);
}
var condition = DataSourceManager.GetConditionCode(_applicationId, SourceId);
_log.Debug(string.Format("DisableDS, result: {0}, conditionCode: {1}", result, condition));
return(false);
}
return(false);
}
return(false);
}
protected void SetValue <T>(T value)
{
/*log.Debug(string.Format("Attempting to set capabilities:{0}, value:{1}, type:{1}",
* _capability, value, _twainType));*/
Logger.WriteLog(LOG_LEVEL.LL_NORMAL_LOG, string.Format("Attempting to set capabilities:{0}, value:{1}, type:{2}",
_capability, value, _twainType.ToString()));
int rawValue = Convert.ToInt32(value);
var oneValue = new CapabilityOneValue(_twainType, rawValue);
var twainCapability = TwainCapability.From(_capability, oneValue);
TwainResult result = Twain32Native.DsCapability(
_applicationId,
_sourceId,
DataGroup.Control,
DataArgumentType.Capability,
Message.Set,
twainCapability);
if (result != TwainResult.Success)
{
Logger.WriteLog(LOG_LEVEL.LL_SUB_FUNC, string.Format("Failed to set capabilities:{0}, value:{1}, type:{2}, result:{3}",
_capability, value, _twainType, result));
if (result == TwainResult.Failure)
{
var conditionCode = GetStatus();
Logger.WriteLog(LOG_LEVEL.LL_SERIOUS_ERROR, string.Format("Failed to set capabilites:{0} reason: {1}",
_capability, conditionCode));
throw new TwainException("Failed to set capability.", result, conditionCode);
}
else if (result == TwainResult.CheckStatus)
{
Logger.WriteLog(LOG_LEVEL.LL_SUB_FUNC, "Value changed but not to requested value");
}
else
{
throw new TwainException("Failed to set capability.", result);
}
}
else
{
Logger.WriteLog(LOG_LEVEL.LL_NORMAL_LOG, "Set capabilities:" + _capability + " successfully");
}
}
protected void SetValue <T>(T value)
{
log.Debug(string.Format("Attempting to set capabilities:{0}, value:{1}, type:{1}",
_capability, value, _twainType));
int rawValue = Convert.ToInt32(value);
var oneValue = new CapabilityOneValue(_twainType, rawValue);
var twainCapability = TwainCapability.From(_capability, oneValue);
TwainResult result = Twain32Native.DsCapability(
_applicationId,
_sourceId,
DataGroup.Control,
DataArgumentType.Capability,
Message.Set,
twainCapability);
if (result != TwainResult.Success)
{
log.Debug(string.Format("Failed to set capabilities:{0}, value:{1}, type:{1}, result:{2}",
_capability, value, _twainType, result));
if (result == TwainResult.Failure)
{
var conditionCode = GetStatus();
log.Error(string.Format("Failed to set capabilites:{0} reason: {1}",
_capability, conditionCode));
throw new TwainException("Failed to set capability.", result, conditionCode);
}
else if (result == TwainResult.CheckStatus)
{
log.Debug("Value changed but not to requested value");
}
else
{
throw new TwainException("Failed to set capability.", result);
}
}
else
{
log.Debug("Set capabilities successfully");
}
}
public TwainException(string message, TwainResult returnCode, ConditionCode conditionCode)
: this(message, null)
{
ReturnCode = returnCode;
ConditionCode = conditionCode;
}
public TwainException(string message, TwainResult returnCode, ConditionCode conditionCode)
: this(message, null)
{
ReturnCode = returnCode;
ConditionCode = conditionCode;
}
protected IntPtr FilterMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (DataSource.SourceId.Id == 0)
{
handled = false;
return(IntPtr.Zero);
}
int pos = User32Native.GetMessagePos();
WindowsMessage message = new WindowsMessage();
message.hwnd = hwnd;
message.message = msg;
message.wParam = wParam;
message.lParam = lParam;
message.time = User32Native.GetMessageTime();
message.x = (short)pos;
message.y = (short)(pos >> 16);
Marshal.StructureToPtr(message, _eventMessage.EventPtr, false);
_eventMessage.Message = 0;
TwainResult result = Twain32Native.DsEvent(
ApplicationId,
DataSource.SourceId,
DataGroup.Control,
DataArgumentType.Event,
Message.ProcessEvent,
ref _eventMessage);
if (result == TwainResult.NotDSEvent)
{
handled = false;
return(IntPtr.Zero);
}
switch (_eventMessage.Message)
{
case Message.XFerReady:
Exception exception = null;
try
{
TransferPictures();
}
catch (Exception e)
{
exception = e;
}
CloseDsAndCompleteScanning(exception);
break;
case Message.CloseDS:
case Message.CloseDSOK:
case Message.CloseDSReq:
CloseDsAndCompleteScanning(null);
break;
case Message.DeviceEvent:
break;
default:
break;
}
handled = true;
return(IntPtr.Zero);
}
public DefaultDataSourceException(string message, TwainResult returnCode, ConditionCode conditionCode)
: this(message, null)
{
ReturnCode = returnCode;
ConditionCode = conditionCode;
}
protected IntPtr FilterMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
if (DataSource.SourceId.Id == 0)
{
handled = false;
return(IntPtr.Zero);
}
int pos = User32Native.GetMessagePos();
WindowsMessage message = new WindowsMessage();
message.hwnd = hwnd;
message.message = msg;
message.wParam = wParam;
message.lParam = lParam;
message.time = User32Native.GetMessageTime();
message.x = (short)pos;
message.y = (short)(pos >> 16);
Marshal.StructureToPtr(message, _eventMessage.EventPtr, false);
_eventMessage.Message = 0;
TwainResult result = Twain32Native.DsEvent(
ApplicationId,
DataSource.SourceId,
DataGroup.Control,
DataArgumentType.Event,
Message.ProcessEvent,
ref _eventMessage);
if (result == TwainResult.NotDSEvent)
{
handled = false;
return(IntPtr.Zero);
}
switch (_eventMessage.Message)
{
case Message.XFerReady:
IList <IntPtr> imagePointers = TransferPictures();
foreach (IntPtr image in imagePointers)
{
using (var renderer = new BitmapRenderer(image))
{
Images.Add(renderer.RenderToBitmap());
}
}
EndingScan();
DataSource.Close();
ScanningComplete(this, EventArgs.Empty);
break;
case Message.CloseDS:
EndingScan();
DataSource.Close();
break;
case Message.CloseDSOK:
EndingScan();
DataSource.Close();
break;
case Message.DeviceEvent:
break;
}
handled = true;
return(IntPtr.Zero);
}