c# 实现打印机状态查询与阻塞打印

沃梦达教程 C#/.NET开发

2023-04-15

这篇文章主要介绍了c# 引用System.Management来实现对打印机状态的查询，帮助大家更好的理解和学习使用c#，感兴趣的朋友可以了解下

在使用winform编写自动打印服务的过程中，发现只要进行了打印命令的调用，文档就会进入到打印等待队列，如果打印机无法正常工作，则会影响到相关业务数据的正确转换，所以需要检查打印机的状态来保障每次打印时打印机处于空闲状态，打印时队列中也只能有一个文档，本文是通过引用System.Management来实现对打印机状态的查询

打印机状态获取


enum PrinterStatus
        {
            其他 = 1,
            未知 = 2,
            空闲 = 3,
            打印 = 4,
            预热 = 5,
            停止打印 = 6,
            脱机 = 7,
        }

        /// <summary>
        /// 获取打印机的当前状态
        /// </summary>
        /// <param name="PrinterDevice">打印机设备名称</param>
        /// <returns>打印机状态</returns>
        private static PrinterStatus GetPrinterPrinterStatus(string PrinterDevice)
        {
            PrinterStatus ret = 0;
            string path = @"win32_printer.DeviceId='" + PrinterDevice + "'";
            ManagementObject printer = new ManagementObject(path);
            printer.Get();
            ret = (PrinterStatus)Convert.ToInt32(printer.Properties["PrinterStatus"].Value);
            return ret;
        }

打印机脱机检查


public static bool CheckPrinter(string BindPrintName)
        {
            ManagementScope scope = new ManagementScope(@"\root\cimv2");
            scope.Connect();

            // Select Printers from WMI Object Collections
            ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer");

            string printerName = "";
            foreach (ManagementObject printer in searcher.Get())
            {
                printerName = printer["Name"].ToString().ToLower();
                if (printerName.IndexOf(BindPrintName.ToLower()) > -1)
                {
                    //foreach (var property in printer.Properties)
                    //{
                    //    LogUtil.WriteLog(property.Name + ":" + property.Value);
                    /

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