Gets information for specific device event
public TwainDeviceEvent GetDeviceEventData()
Public Function GetDeviceEventData() As TwainDeviceEvent
public:
TwainDeviceEvent^ GetDeviceEventData();
A TwainDeviceEvent object that represents device event information
This method will returns information for specific device event. To get status for each device event, set EnableGetDeviceEvent property to TRUE to enable firing GetDeviceEvent event To get CAP_DEVICEEVENT capability values, call GetDeviceEventCapability method, and to set CAP_DEVICEEVENT capability call SetDeviceEventCapability method, also call ResetDeviceEventCapability method to reset CAP_DEVICEEVENT capability.\
This method should be called inside GetDeviceEvent event to get the device event information.
using Leadtools;
using Leadtools.Twain;
TwainSession session = new TwainSession();
public void GetDeviceEventDataExample(IntPtr parent)
{
try
{
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None);
session.GetDeviceEvent += new EventHandler<EventArgs>(session_GetDeviceEvent);
session.EnableGetDeviceEvent = true;
session.Acquire(TwainUserInterfaceFlags.Show);
session.Shutdown();
}
catch
{ }
}
void session_GetDeviceEvent(object sender, EventArgs e)
{
try
{
TwainDeviceEvent deviceEvent = session.GetDeviceEventData();
string msg = string.Format("Event ={0}\nEvent Name ={1}\n", deviceEvent.Event, deviceEvent.DeviceName);
MessageBox.Show(msg);
if (deviceEvent.Event == TwainCapabilityValue.DeviceEventCheckBattery)
{
msg = string.Format("Battery Minutes ={0}\nBattery Percentage ={1}\n", deviceEvent.BatteryMinutes, deviceEvent.BatteryPercentage);
MessageBox.Show(msg);
}
else if (deviceEvent.Event == TwainCapabilityValue.DeviceEventCheckPowerSupply)
{
msg = string.Format("Power Supply ={0}\n", deviceEvent.PowerSupply);
MessageBox.Show(msg);
}
else if (deviceEvent.Event == TwainCapabilityValue.DeviceEventCheckPowerSupply)
{
msg = string.Format("XResolution ={0}\nYResolution ={1}\n", deviceEvent.XResolution, deviceEvent.YResolution);
MessageBox.Show(msg);
}
else if (deviceEvent.Event == TwainCapabilityValue.DeviceEventCheckFlash)
{
msg = string.Format("FlashUsed2 ={0}\n", deviceEvent.FlashUsed2);
MessageBox.Show(msg);
}
else if (deviceEvent.Event == TwainCapabilityValue.DeviceEventCheckAutomaticCapture)
{
msg = string.Format("Automatic Capture ={0}\nTime Before First Capture ={1}\nTime Between Captures = {2}\n", deviceEvent.AutomaticCapture, deviceEvent.TimeBeforeFirstCapture, deviceEvent.TimeBetweenCaptures);
MessageBox.Show(msg);
}
}
catch
{ }
}
Imports Leadtools
Imports Leadtools.Twain
Public WithEvents session As TwainSession = New TwainSession()
Private Sub session_GetDeviceEvent(ByVal sender As Object, ByVal e As System.EventArgs) Handles session.GetDeviceEvent
Try
Dim deviceEvent As TwainDeviceEvent = session.GetDeviceEventData()
Dim msg As String = String.Format("Event ={0}{1}Event Name ={2}", deviceEvent.Event, Chr(13), deviceEvent.DeviceName)
MessageBox.Show(msg)
If deviceEvent.Event = TwainCapabilityValue.DeviceEventCheckBattery Then
msg = String.Format("Battery Minutes ={0}{1}Battery Percentage ={2}", deviceEvent.BatteryMinutes, Chr(13), deviceEvent.BatteryPercentage)
MessageBox.Show(msg)
ElseIf deviceEvent.Event = TwainCapabilityValue.DeviceEventCheckPowerSupply Then
msg = String.Format("Power Supply ={0}", deviceEvent.PowerSupply)
MessageBox.Show(msg)
ElseIf deviceEvent.Event = TwainCapabilityValue.DeviceEventCheckPowerSupply Then
msg = String.Format("XResolution ={0}{1}YResolution ={2}", deviceEvent.XResolution, Chr(13), deviceEvent.YResolution)
MessageBox.Show(msg)
ElseIf deviceEvent.Event = TwainCapabilityValue.DeviceEventCheckFlash Then
msg = String.Format("FlashUsed2 ={0}", deviceEvent.FlashUsed2)
MessageBox.Show(msg)
ElseIf deviceEvent.Event = TwainCapabilityValue.DeviceEventCheckAutomaticCapture Then
msg = String.Format("Automatic Capture ={0}{1}Time Before First Capture ={2}{3}Time Between Captures = {4}", deviceEvent.AutomaticCapture, Chr(13), deviceEvent.TimeBeforeFirstCapture, Chr(13), deviceEvent.TimeBetweenCaptures)
MessageBox.Show(msg)
End If
Catch
End Try
End Sub
Public Sub GetDeviceEventDataExample(ByVal parent As IntPtr)
Try
session.Startup(parent, "manufacturer", "productFamily", "version", "application", TwainStartupFlags.None)
AddHandler session.GetDeviceEvent, AddressOf session_GetDeviceEvent
session.EnableGetDeviceEvent = True
session.Acquire(TwainUserInterfaceFlags.Show)
session.Shutdown()
Catch
End Try
End Sub
SetDeviceEventCapability Method
GetDeviceEventCapability Method
ResetDeviceEventCapability Method
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