如何获取网络上所有打印机的列表以检查它是联机还是脱机 [英] how to get a list of all printers on a network to check it is online or offline

问题描述

有人可以告诉我如何获取网络上所有打印机的列表吗?
我尝试使用WMI，但以下代码仅向我提供了本地打印机的列表

这是我尝试过的代码.

Can anyone tell me how to get a list of all printers on a network?
I have tried using WMI but the following code only gives me a list of local printers

here is the code that i tried.

//--set the scope of this search to the local machine
              ManagementScope scope = new ManagementScope(@"\root\cimv2");

              //--connect to the machine
              scope.Connect();

              //--query for the ManagementObjectSearcher to get all printer
              SelectQuery selectQuery1 = new SelectQuery();
              selectQuery1.QueryString = "Select * from win32_Printer";
              ManagementObjectSearcher obj = new ManagementObjectSearcher(scope,  selectQuery1);
              ManagementObjectCollection printers = obj.Get();

               //--now loop through each printer instance returned
                  foreach (ManagementObject printer in printers)
                  {
                      //--first make sure that there is a printer
                      if (printer != null)
                      {
                          str = printer["Name"].ToString().ToLower();

                          //--check if it matches the name provided
                          if (str.ToUpper().Equals("MyPrinterName".ToUpper()))
                          {
                              //--since we found a match check it''s status
                              if  (printer["WorkOffline"].ToString().ToLower().Equals("true") || printer["PrinterStatus"].Equals(7))
                              {
                                  //--it''s offline
                                  online = false;
                              }
                              else
                              {
                                  //--it''s online
                                  online = true;
                              }
                          }
                      }
                      else
                      {
                          throw new Exception("No printers were found");
                      }
                  }

请帮我.

lease Help me.

推荐答案

没有一种方法可以获取所有打印机.这取决于您的打印机如何连接到网络.它们都可以通过单个打印服务器使用吗?他们在ActiveDirectory中吗?他们只是坐在IP地址旁，以便任何客户端安装自己的驱动程序并向其打印直接IP吗?

There''s no one method that''s going to get all printers. It depends on how your printers are connected to the network. Are they all available through a single print server? Are they in ActiveDirectory? Are they just sitting around with IP addresses so any client install their own drivers and print direct IP to them??

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