如何在USB打印机上进行打印时收到通知 [英] How to get notified when printing occurs to USB printer

问题描述

现在我正在使用下面的代码。但只有当我插入或拔出USB打印机时，此代码才会通知我。但是我需要在USB打印机上进行打印时收到通知。我正在使用c＃和.netfx4.5。



请帮助我，任何建议都将受到高度赞赏！



问候，Orgil.D



我尝试过：

Now I'm using code below. But this code notifies me only when I plug in or out USB printer. But I need to get notified when printing occurs on USB printer. I am using c# and .netfx4.5.

Please help me, any suggestion would be highly appreciated!

Regards, Orgil.D

What I have tried:

<pre>using LibUsbDotNet.DeviceNotify;
//...
public static IDeviceNotifier UsbDeviceNotifier = DeviceNotifier.OpenDeviceNotifier();

    private static void Main(string[] args)
    {
        // Hook the device notifier event
        UsbDeviceNotifier.OnDeviceNotify += OnDeviceNotifyEvent;

        // Exit on and key pressed.
        Console.Clear();            
        Console.WriteLine();
        Console.WriteLine("Waiting for system level device events..");
        Console.Write("[Press any key to exit]");

        while (!Console.KeyAvailable)
            Application.DoEvents();

        UsbDeviceNotifier.Enabled = false;  // Disable the device notifier

        // Unhook the device notifier event
        UsbDeviceNotifier.OnDeviceNotify -= OnDeviceNotifyEvent;
    }

    private static void OnDeviceNotifyEvent(object sender, DeviceNotifyEventArgs e)
    {
        // A Device system-level event has occured

        Console.SetCursorPosition(0,Console.CursorTop);

        Console.WriteLine(e.ToString()); // Dump the event info to output.

        Console.WriteLine();
        Console.Write("[Press any key to exit]");
    }

推荐答案

您必须监控Windows打印作业并检查您的USB打印机是否为输出设备。 />


一些可能有用的链接：

监视打印机队列（.NET）中的作业 [ ^ ]

一种使用WMI控制打印作业的简单方法 [ ^ ]

You have to monitor the Windows print jobs and check if your USB printer is the output device.

Some links which might be helpful:
Monitor jobs in a printer queue (.NET)[^]
A simple approach for controlling print jobs using WMI[^]

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