c# 获取和取消本地打印队列

Dictionary<string,

int> GetAllPrinterQueues()

{

    RaiseLog("Getting print queue counts");

    Dictionary<string,

int> TempDict

= new Dictionary<string,

int>();



    PrintServer myPrintServer =

new PrintServer();

// Get all the printers installed on this PC



    // List the print server's queues

    PrintQueueCollection myPrintQueues 

= myPrintServer.GetPrintQueues();

    String printQueueNames =

"My Print Queues:\n\n";

    foreach (PrintQueue pq

in myPrintQueues)

    {

        Saint.StCommon.Wait((decimal)2000);

// 2 seconds of "Application.DoEvents(), not thread sleep

        if (GotPingBack(pq.Name))

        {

            int PGcount

= 0;

            try

            {

                if (pq.NumberOfJobs

> 0)

                {

                    // We know there are jobs.  So we *have* to be able to get the collection at some point

                    DateTime Bailout = DateTime.Now.AddSeconds(10);

// Keep trying for 10 seconds or until I get a valid response

                    string ErrMsg

= "notyetretreived";

                    while (Bailout

> DateTime.Now

&& ErrMsg 

!= string.Empty)

                    {

                        try

                        {

                            var Jobs

= pq.GetPrintJobInfoCollection();

                            Saint.StCommon.Wait((int)2);

                            foreach (PrintSystemJobInfo Job

in Jobs)

                            {

                                PGcount += Job.NumberOfPages;

                                ErrMsg =

string.Empty;

                            }

                        }

                        catch (Exception k)

                        {

                            ErrMsg = k.Message;

                            Console.WriteLine(string.Format("{0}: {1}",

pq.Name, k.Message));

                        }

                    }

                }

            }

            catch

            {

                Console.WriteLine("Exception dork");

            }

            Console.WriteLine(string.Format("{2}\t{0}\t{1}",

pq.Name, PGcount, DateTime.Now.ToString("HH:mm:ss.fff")));

            TempDict.Add(pq.Name, PGcount);

        }

    }

    return TempDict;

}



public bool CancelPrintJob(int printJobID)

{

    // Variable declarations.           



    bool isActionPerformed

= false;           



    string searchQuery;           



    String jobName;            

    char[] splitArr;           



    int prntJobID;           



    ManagementObjectSearcher searchPrintJobs;            

    ManagementObjectCollection prntJobCollection;            

    try           



    {                

        // Query to get all the queued printer jobs.               



        searchQuery =

"SELECT * FROM Win32_PrintJob";               



        // Create an object using the above query.               



        searchPrintJobs =

new ManagementObjectSearcher(searchQuery);               



        // Fire the query to get the collection of the printer jobs.               



        prntJobCollection = searchPrintJobs.Get();               



        // Look for the job you want to delete/cancel.               



        foreach (ManagementObject prntJob

in prntJobCollection)

        {                    

            jobName = prntJob.Properties["Name"].Value.ToString();                   



            // Job name would be of the format [Printer name], [Job ID]                   



            splitArr =

new 

char[1];                   



            splitArr[0]

= Convert.ToChar(",");                   



            // Get the job ID.                   



            prntJobID = Convert.ToInt32(jobName.Split(splitArr)[1]);                   



            // If the Job Id equals the input job Id, then cancel the job.                   



            if (prntJobID

== printJobID)                   



            {                        

                // Performs a action similar to the cancel                       



                // operation of windows print console                       



                prntJob.Delete();                       



                isActionPerformed =

true;                       



                break;                   



            }                

        }                

        return isActionPerformed;           



    }            

    catch (Exception sysException)           



    {                

        // Log the exception.               



        return

false;           



    }        

}