是否有.NET方法来枚举所有可用的网络打印机？

Question

是否有一种简单的方法来枚举.NET中所有可见的网络打印机？目前,我正在显示PrintDialog以允许用户选择打印机.问题是,本地打印机也会显示(与XPS Document Writer等一起).如果我自己可以枚举网络打印机,我可以只显示那些打印机的自定义对话框.

谢谢!!

Answer 1

• 从中获取默认打印机 LocalPrintServer.DefaultPrintQueue
• 从(从用户的角度)获取已安装的打印机 PrinterSettings.InstalledPrinters
• 列举清单:
• 任何打印机\\都是网络打印机 - 所以请使用new PrintServer("\\UNCPATH").GetPrintQueue("QueueName")
• 任何没有开始的打印机\\都是本地打印机,所以请使用它LocalPrintServer.GetQueue("Name")
• 您可以通过比较FullName属性来查看哪个是默认值.

注意:网络打印机可以是默认打印机LocalPrintServer.DefaultPrintQueue,但不会出现LocalPrintServer.GetPrintQueues()

    // get available printers
    LocalPrintServer printServer = new LocalPrintServer();
    PrintQueue defaultPrintQueue = printServer.DefaultPrintQueue;

    // get all printers installed (from the users perspective)he t
    var printerNames = PrinterSettings.InstalledPrinters;
    var availablePrinters = printerNames.Cast<string>().Select(printerName => 
    {
        var match = Regex.Match(printerName, @"(?<machine>\\\\.*?)\\(?<queue>.*)");
        PrintQueue queue;
        if (match.Success)
        {
            queue = new PrintServer(match.Groups["machine"].Value).GetPrintQueue(match.Groups["queue"].Value);
        }
        else
        {
            queue = printServer.GetPrintQueue(printerName);
        }

        var capabilities = queue.GetPrintCapabilities();
        return new AvailablePrinterInfo()
        {
            Name = printerName,
            Default = queue.FullName == defaultPrintQueue.FullName,
            Duplex = capabilities.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge),
            Color = capabilities.OutputColorCapability.Contains(OutputColor.Color)
        };
    }).ToArray();

    DefaultPrinter = AvailablePrinters.SingleOrDefault(x => x.Default);

Answer 2

使用新的System.Printing API

using (var printServer = new PrintServer(string.Format(@"\\{0}", PrinterServerName)))
{
    foreach (var queue in printServer.GetPrintQueues())
    {
        if (!queue.IsShared)
        {
            continue;
        }
        Debug.WriteLine(queue.Name);
     }
 }

Answer 3

在这里找到这个代码

 private void btnGetPrinters_Click(object sender, EventArgs e)
        {
// Use the ObjectQuery to get the list of configured printers
            System.Management.ObjectQuery oquery =
                new System.Management.ObjectQuery("SELECT * FROM Win32_Printer");

            System.Management.ManagementObjectSearcher mosearcher =
                new System.Management.ManagementObjectSearcher(oquery);

            System.Management.ManagementObjectCollection moc = mosearcher.Get();

            foreach (ManagementObject mo in moc)
            {
                System.Management.PropertyDataCollection pdc = mo.Properties;
                foreach (System.Management.PropertyData pd in pdc)
                {
                    if ((bool)mo["Network"])
                    {
                        cmbPrinters.Items.Add(mo[pd.Name]);
                    }
                }
            }

        }

更新:

"此API函数可以枚举所有网络资源,包括服务器,工作站,打印机,共享,远程目录等."

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=741&lngWId=10