c# - 检查打印是否成功

Question

我正在用 c# 开发 windowform 应用程序。

在我的应用程序中，我编写了以下代码以从本地计算机获取所有图像并打印出来。

  files = Directory.GetFiles(@"C:\temp", "*.jpeg");

        foreach (var i in files)
        {
            var objPrintDoc = new PrintDocument();
            objPrintDoc.PrintPage += (obj, eve) =>
            {
                System.Drawing.Image img = System.Drawing.Image.FromFile(i);
                Point loc = new Point(100, 100);
                eve.Graphics.DrawImage(img, loc);
            };
            objPrintDoc.Print();
        }

现在我想检查打印是否成功，然后我想删除我手动创建的临时文件夹来存储图像。

我试过下面的代码，但它对我不起作用。

        PrintServer myPrintServer;                    
        PrintQueueCollection myPrintQueues = myPrintServer.GetPrintQueues();
        String printQueueNames = "My Print Queues:\n\n";
        foreach (PrintQueue pq in myPrintQueues)
        {
            printQueueNames += "\t" + pq.Name + "\n";
        }

Answer 1

这是 PrintSystemJobInfo.JobStatus 的 msdn 描述

https://msdn.microsoft.com/en-us/library/system.printing.printsystemjobinfo.jobstatus(v=vs.110).aspx

我尝试了以下代码并看到了打印状态。

 private void brnPrint_Click(object sender, EventArgs e)
        {
            var files = Directory.GetFiles(@"D:\Folder", "*.jpg");

            foreach (var i in files)
            {
                var objPrintDoc = new PrintDocument();
                objPrintDoc.PrintPage += (obj, eve) =>
                    {
                        Image img = Image.FromFile(i);
                        Point loc = new Point(100, 100);
                        eve.Graphics.DrawImage(img, loc);
                    };

                objPrintDoc.Print();
                PrintServer myPrintServer = new PrintServer(@"\\ComputerName");
                PrintQueueCollection myPrintQueues = myPrintServer.GetPrintQueues();                   
                try
                {
                    foreach (PrintQueue pq in myPrintQueues)
                    {
                        pq.Refresh();
                        PrintJobInfoCollection pCollection = pq.GetPrintJobInfoCollection();
                        foreach (PrintSystemJobInfo job in pCollection)
                        {
                            listBox1.Items.Add(pq.Name);
                            SpotTroubleUsingJobAttributes(job);
                        }

                    }
                }
                catch (Exception)
                {
                     //throw;
                }
            }
        }

        public void SpotTroubleUsingJobAttributes(PrintSystemJobInfo theJob)
        {
            if ((theJob.JobStatus & PrintJobStatus.Blocked) == PrintJobStatus.Blocked)
            {
                listBox1.Items.Add("The job is blocked.");
            }
            if (((theJob.JobStatus & PrintJobStatus.Completed) == PrintJobStatus.Completed)
                ||
                ((theJob.JobStatus & PrintJobStatus.Printed) == PrintJobStatus.Printed))
            {
                listBox1.Items.Add(
                    "The job has finished. Have user recheck all output bins and be sure the correct printer is being checked.");
            }
            if (((theJob.JobStatus & PrintJobStatus.Deleted) == PrintJobStatus.Deleted)
                ||
                ((theJob.JobStatus & PrintJobStatus.Deleting) == PrintJobStatus.Deleting))
            {
                listBox1.Items.Add(
                    "The user or someone with administration rights to the queue has deleted the job. It must be resubmitted.");
            }
            if ((theJob.JobStatus & PrintJobStatus.Error) == PrintJobStatus.Error)
            {
                listBox1.Items.Add("The job has errored.");
            }
            if ((theJob.JobStatus & PrintJobStatus.Offline) == PrintJobStatus.Offline)
            {
                listBox1.Items.Add("The printer is offline. Have user put it online with printer front panel.");
            }
            if ((theJob.JobStatus & PrintJobStatus.PaperOut) == PrintJobStatus.PaperOut)
            {
                listBox1.Items.Add("The printer is out of paper of the size required by the job. Have user add paper.");
            }

            //if (((theJob.JobStatus & PrintJobStatus.Paused) == PrintJobStatus.Paused)
            //    ||
            //    ((theJob.HostingPrintQueue.QueueStatus & PrintQueueStatus.Paused) == PrintQueueStatus.Paused))
            //{
            //    HandlePausedJob(theJob);
            //    //HandlePausedJob is defined in the complete example.
            //}

            if ((theJob.JobStatus & PrintJobStatus.Printing) == PrintJobStatus.Printing)
            {
                listBox1.Items.Add("The job is printing now.");
            }
            if ((theJob.JobStatus & PrintJobStatus.Spooling) == PrintJobStatus.Spooling)
            {
                listBox1.Items.Add("The job is spooling now.");
            }
            if ((theJob.JobStatus & PrintJobStatus.UserIntervention) == PrintJobStatus.UserIntervention)
            {
                listBox1.Items.Add("The printer needs human intervention.");
            }

        }