TwainDeviceEvent Class

Summary

Provides information about the Event that was raised by the Source. The Source should only fill in those fields applicable to the Event. The Application must only read those fields applicable to the Event.

Syntax

C++/CLI

Python

public class TwainDeviceEvent

public ref class TwainDeviceEvent

class TwainDeviceEvent:

Example

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 
   { } 
}