Question

运行以下代码，我对“可用性”一无所获。如果打印机是在线还是离线，如何获取信息？在Windows设置中，但我的代码未显示它：

    {        
        ManagementScope scope = new ManagementScope(@"\root\cimv2");
        scope.Connect();

        ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer");

        foreach (ManagementObject printer in searcher.Get())
        {
            string printerName = printer["Name"].ToString().ToLower();
            Console.WriteLine("Printer :" + printerName);

            PrintProps(printer, "Caption");
            PrintProps(printer, "ExtendedPrinterStatus");
            PrintProps(printer, "Availability");
            PrintProps(printer, "Default");
            PrintProps(printer, "DetectedErrorState");
            PrintProps(printer, "ExtendedDetectedErrorState");
            PrintProps(printer, "ExtendedPrinterStatus");
            PrintProps(printer, "LastErrorCode");
            PrintProps(printer, "PrinterState");
            PrintProps(printer, "PrinterStatus");
            PrintProps(printer, "Status");
            PrintProps(printer, "WorkOffline");
            PrintProps(printer, "Local");
        }
    }

    static void PrintProps(ManagementObject o, string prop)
    {
        try { Console.WriteLine(prop + "|" + o[prop]); }
        catch (Exception e) { Console.Write(e.ToString()); }
    }

Answer 1

我遇到的问题是必须区分网络/无线连接的打印机和USB有线打印机：

   PrintProps(printer, "WorkOffline"); // works only for usb wired printers

使打印机连接/可用

1 个答案: