How to send multiple files to the printer with one Process call

问题

I need to print multiple PDF-files from the hard-drive. I have found this beautiful solution of how to send a file to the printer. The problem with this solution is that if you want to print multiple files you have to wait for each file for the process to finish.

in the command shell it is possible to use the same command with multiple filenames: print /D:printerName file1.pdf file2.pdf and one call would print them all.

unfortunately simply just to put all the filenames into the ProcessStartInfo doesn't work

string filenames = @"file1.pdf file2.pdf file3.pdf"
ProcessStartInfo info = new ProcessStartInfo();
info.Verb = "print";
info.FileName = filenames;

neither does it to put the filenames as Arguments of the Process

info.Arguments = filename;

I always get the error: Cannot find the file!

How can I print a multitude of files with one process call?

Here is an example of how I use it now:

public void printWithPrinter(string filename, string printerName)
{

    var procInfo = new ProcessStartInfo();    
    // the file name is a string of multiple filenames separated by space
    procInfo.FileName = filename;
    procInfo.Verb = "printto";
    procInfo.WindowStyle = ProcessWindowStyle.Hidden;
    procInfo.CreateNoWindow = true;

    // select the printer
    procInfo.Arguments = "\"" + printerName + "\""; 
    // doesn't work
    //procInfo.Arguments = "\"" + printerName + "\"" + " " + filename; 

    Process p = new Process();
    p.StartInfo = procInfo;

    p.Start();

    p.WaitForInputIdle();
    //Thread.Sleep(3000;)
    if (!p.CloseMainWindow()) p.Kill();
}

回答1:

Following should work:

public void PrintFiles(string printerName, params string[] fileNames)
{
    var files = String.Join(" ", fileNames);
    var command = String.Format("/C print /D:{0} {1}", printerName, files);
    var process = new Process();
    var startInfo = new ProcessStartInfo
    {
        WindowStyle = ProcessWindowStyle.Hidden,
        FileName = "cmd.exe",
        Arguments = command
    };

    process.StartInfo = startInfo;
    process.Start();
}

//CALL
PrintFiles("YourPrinterName", "file1.pdf", "file2.pdf", "file3.pdf");

回答2:

It's not necessarily a simple solution, but you could merge the pdfs first and then send then to acrobat.

For example, use PdfMerge

Example overload to your initial method:

    public void printWithPrinter(string[] fileNames, string printerName)
    {
        var fileStreams = fileNames
            .Select(fileName => (Stream)File.OpenRead(fileName)).ToList();
        var bundleFileName = Path.GetTempPath();
        try
        {

            try
            {
                var bundleBytes = new PdfMerge.PdfMerge().MergeFiles(fileStreams);
                using (var bundleStream = File.OpenWrite(bundleFileName))
                {
                    bundleStream.Write(bundleBytes, 0, bundleBytes.Length);
                }
            }
            finally 
            {
                    fileStreams.ForEach(s => s.Dispose());
            }

            printWithPrinter(bundleFileName, printerName);
        }
        finally 
        {
            if (File.Exists(bundleFileName))
                File.Delete(bundleFileName);
        }
    }

来源：https://stackoverflow.com/questions/37526151/how-to-send-multiple-files-to-the-printer-with-one-process-call

标签

pdf

printing

process